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2</a></p></header><div class="excerpt"><p>Machine Design MCQ Objective Question and Answers Part 2 
Machine Design Multiple choice Objective Question useful for technical Aptitude test.  Machine Design MCQ : Part 1 | Part 2 | Part 3...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/machine-design-mcq-objective-question-and-answers-part-2/" aria-label="View Post: Machine Design MCQ Objective Question and Answers Part 2">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Machine Design MCQ Objective Question and Answers Part 2","url":"\/\/www.gunkrazy.com\/machine-design-mcq-objective-question-and-answers-part-2\/","articleBody":"Machine Design MCQ Objective Question and Answers Part 2\u00a0\r\nMachine Design Multiple choice Objective Question useful for technical Aptitude test.\r\n\r\n\r\n\r\nMachine Design MCQ : Part 1 | Part 2 | Part 3 | Part 4\u00a0\r\n\r\n\r\n\r\n\r\n\r\n40. In most machine members, the damping capacity of the material should be\r\n(a) low\r\n(b) zero\r\n(c) high\r\n(d) could be anything\r\n(e) none of the above.\r\n\u00a0Ans: c\r\n\r\n41. The ratio of endurance limit in shear to the endurance limit in flexure is\r\n(a) 0.33\r\n(b) 0.4\r\n(c) 0.5\r\n(d) 0.55\r\n(e) 0.6\r\nAns: d\r\n\r\n42. For steel, the ultimate strength in shear as compared to ultimate strength in tension is\r\n(a) same\r\n(b) 1\/2\r\n(c) 1\/3\r\n(d) 1\/4\r\n(e) 2\/3\r\nAns: e\r\n\r\n43. The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of\r\n(a) 0.25\r\n(b) 0.45\r\n(r) 0.55\r\n(d) 0.65\r\n(e)0.75.\r\nAns: e\r\n\r\n44. At low temperatures (say 75\u00b0C) the notched-bar impact value of steel\r\n(a) increases markedly\r\n(b) decreases markedly\r\n(c) remains same\r\n(d) depends on heat treatment carried out\r\n(e) none of the above.\r\nAns: b\r\n\r\n45. A bolt\r\n(a) has a head on one end and a nut fitted to the other\r\n(b) has head at one end and other end fits into a tapped hole in the other part to be joined\r\n(c) has both the ends threaded\r\n(d) is provided with pointed threads\r\n(e) requires no nut.\r\nAns: a\r\n\r\n46. The crest diameter of a screw thread is same as\r\n(a) major diameter\r\n(b) minor diameter\r\n(c) pitch diameter\r\n(d) core diameter\r\n(e) none of the above.\r\nAns: a\r\n\r\n47. If d is the diameter of bolt hole then for a flanged pipe joint to be leak proof, the circumferential pitch of the bolts should be\r\n(a) lOVZ\r\n(b) 10VZtol5Vd\r\n(c) 15Vdto20VZ\r\n(d) 20Vdto30Vd\r\n(e) 30V5\"to40Vd.\r\nAns: d\r\n\r\n48. Maximum principal stress theory is applicable for\r\n(a) ductile materials\r\n(b) brittle materials\r\n(c) elastic materials\r\n(d) all of the above\r\n(e) none of the above.\r\nAns: b\r\n\r\nmaximum principal stress theory\r\n\r\n49. The following type of nut is used with alien bolt\r\n(a) alien nut\r\n(b) hexagonal nut\r\n(c) slotted nut\r\n(d) castle nut\r\n(e) any one of the above.\r\nAns: e\r\n\r\n50. A stud\r\n(a) has a head on one end and a nut fitted to the other\r\n(b) has head at one end and other end fits into a tapped hole in the other part to be joined\r\n(c) has both the ends threaded\r\n(d) has pointed threads\r\n(e) requires locking nuts.\r\nAns: c\r\n\r\n51. Shear stress theory is applicable for\r\n(a) ductile fnaterials\r\n(b) brittle materials\r\n(c) elastic materials\r\n(d) all of the above\r\n(e) none of the above.\r\nAns: a\r\n\r\n52. A tap bolt\r\n(a) has a head on one end and a nut fitted to the other\r\n(b) has head at one end and other end fits into a tapped hole in the other part \\o be joined\r\n(c) has both the ends threaded\r\n(d) has pointed threads\r\n(e) requires locking devices.\r\nAns: b\r\n\r\n53. For applications involving high stresses in one direction only the following type of thread would be best suited\r\n(a) ISO metric thread\r\n(b) acme thread\r\n(c) square thread\r\n(d) buttress thread\r\n(e) British Association thread.\r\nAns: d\r\n\r\n54. The included angle in unified of American National threads is\r\n(a) 60\u00b0\r\n(b) 55\u00b0\r\n(c) 47\u00b0\r\n(d) 29\u00b0\r\n(e) none of the above.\r\nAns: a\r\n\r\n55. The function of a washer is to\r\n(a) provide cushioning effect\r\n(b) provide bearing area\r\n(c) absorb shocks and vibrations\r\n(d) provide smooth surface in place of rough surface\r\n(e) act as a locking device.\r\nAns: b\r\n\r\n56. Cap screws are\r\n(a) similar to'small size tap bolts except that a greater variety of shapes of heads are available\r\n(b) slotted for a screw driver and generally used with a nut\r\n(c) used to prevent relative motion be-tween parts\r\n(d) provided with detachable caps\r\n(e) similar to stud.\r\nAns: a\r\n\r\n57. An alien bolt is\r\n(a) self locking bolt\r\n(b) same as stud\r\n(c) provided with hexagonal depression in head\r\n(d) used in high speed components\r\n(e) provided with countersunk head.\r\nAns: c\r\n\r\n58. The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under load W will be\r\n(a) 28\r\n(b) 8\/2\r\n(c) 48\r\n(d) 8\/4\r\n(e) none of the above.\r\nAns: c\r\n\r\n59. Ball bearing type screws are found in following application\r\n(a) screw jack \u00a0 \u00a0\r\n(b) aeroplane engines\r\n(c) crane\r\n(d) steering mechanism\r\n(e) bench vice.\r\nAns: d\r\n\r\n60. Set screws are\r\n(a) similar to small size tap bolts except that a greater variety of shapes of heads are available\r\n(b) slotted for a screw driver and generally used with a nut\r\n(c) used to prevent relative motion be-tween parts\r\n(d) similar to stud\r\n(e) none of the above.\r\nAns: c\r\n\r\n61. A self locking screw has\r\n(a) fine threads\r\n(b) coarse threads\r\n(c) coefficient of friction &gt; tangent of load angle\r\n(d) hole for inserting split pin\r\n(e) two nuts for locking.\r\nAns: c\r\n\r\n62. The designation M 33 x 2 of a bolt means\r\n(a) metric threads of 33 nos in 2 cm.\r\n(b) metric threads with cross-section of 33 mm\r\n(c) metric threads of 33 mm outside diameter and 2 mm pitch\r\n(d) bolt of 33 mm nominal diameter having 2 threads per cm\r\n(e) none of the above.\r\nAns: c\r\n\r\n63. Machine screws are\r\n(a) similar to small size tap bolts except that a greater variety of shapes of heads are available\r\n(b) slotted for a screw driver and generally used with a nut\r\n(c) used to prevent relative motion be-tween two parts\r\n(d) similar to stud\r\n(e) none of the above.\r\nAns: b\r\n\r\n64. Rivets are generally specified by\r\n(a) thickness of plates to be riveted\r\n(b) length of rivet\r\n(c) diameter of head\r\n(d) nominal diameter\r\n(e) all of the above.\r\n\u00a0Ans: d\r\n\r\n65. The edges of a boiler plate are bevelled to an angle of\r\n(a) 30\u00b0\r\n(b) 45\u00b0\r\n(c) 60\u00b0\r\n(d) 80\u00b0\r\n(e) 85\u00b0.\r\nAns: d\r\n\r\n66. Which of the following is a permanent fastening ?\r\n(a) bolts\r\n(b) keys\r\n(c) cotters\r\n(d) rivets\r\n(e) screws.\r\nAns: d\r\n\r\n67. In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole to the nearest edge of the plate in terms of dia. of rivet d should be equal to\r\n(a) d\r\n(b) 1.25 d\r\n(c) 1.5 d\r\n(d) 1.75 d\r\n(e) 2 d.\r\nAns: c\r\n\r\n68. If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to\r\n(a) 0.2\r\n(b) 0.25\r\n(c) 0.50\r\n(d) 0.6\r\n(e) 0.75.\r\nAns: b\r\n\r\n69. Transverse fillet welded joints are designed for\r\n(a) tensile strength\r\n(b) compressive strength\r\n(c) shear strength\r\n(d) bending strength\r\n(e) torsional strength.\r\nAns: a\r\n\r\n70. Jam nut is a locking device in which\r\n(a) one smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming\r\n(b) a slot is cut partly in middle of nut and then slot reduced by tightening a screw\r\n(c) a hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip\r\n(d) through slots are made at top and a cotter-pin is passed through these and a hole in the bolt, and cotter spitted and bent in reverse direction at other end\r\n(e) none of the above.\r\nAns: a\r\n\r\n71. The pitch of threads on a Jock nut in comparison to pitch of nut is\r\n(a) same\r\n(b) coarser\r\n(c) finer\r\n(d) very coarse\r\n(e) very fine.\r\nAns: a\r\n\r\n\r\n\r\nMachine Design MCQ : Part 1 | Part 2 | Part 3 | Part 4\u00a0\r\n\r\n\r\n\r\nMore Resources \/articles\r\nMechanical MCQ Objectives Question and Answers\r\nTechnical Mechanical Interview Question and Answers\r\nMachine Design Notes , article , Interview Que. and Ans.\r\nMechanical Subjectwise Basic Concept Notes ,Articles\r\n\r\n\r\n\r\n&nbsp;","headline":"Machine Design MCQ Objective Question and Answers Part 2","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2019-06-12","mainEntityOfPage":"False","dateModified":"February 18, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2019\/06\/maximum-principal-stress-theory-300x191.jpg","height":191,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/machine-design-mcq-objective-question-and-answers/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2019/06/les_mom_modulusofresilience_1.png')"></div><span class="sr-only">link to Machine Design MCQ Objective Question and Answers Part 1</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/machine-design-mcq-objective-question-and-answers/">Machine Design MCQ Objective Question and Answers Part 1</a></p></header><div class="excerpt"><p>Machine Design MCQ Objective Question and Answers Part 1 
Machine Design Multiple choice Objective Question useful for technical Aptitude test.  Machine Design MCQ : Part 1 | Part 2 | Part 3...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/machine-design-mcq-objective-question-and-answers/" aria-label="View Post: Machine Design MCQ Objective Question and Answers Part 1">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Machine Design MCQ Objective Question and Answers Part 1","url":"\/\/www.gunkrazy.com\/machine-design-mcq-objective-question-and-answers\/","articleBody":"Machine Design MCQ Objective Question and Answers Part 1\u00a0\r\nMachine Design Multiple choice Objective Question useful for technical Aptitude test.\r\n\r\n\r\n\r\nMachine Design MCQ : Part 1 | Part 2 | Part 3 | Part 4\u00a0\r\n\r\n\r\n\r\n\r\n\r\n\r\n1. The ultimate strength of steel in tension in comparison to shear is in the ratio of\r\n(a) 1 : l \r\n(b) 2:1\r\n(c) 3 : 2 \r\n(d) 2 : 3\r\n(e) 1 : 2\r\nAns: c\r\n\r\n2. The permissible stress for carbon steel under static loading is generally taken as\r\n(a) 2000-3000 kg\/cm2\r\n(b) 3000-4000 kg\/cm2\r\n(c) 4000-4500 kg\/cm2\r\n(d) 7500-10,000 kg\/cm2\r\n(e) 10,000-15,000 kg\/cm2.\r\nAns: c\r\n\r\n3. The property of a material which enables it to resist fracture due to high impact loads is known as\r\n(a) elasticity \r\n(b) endurance\r\n(c) strength \r\n(d) toughness\r\n(e) resilience.\r\nAns: d\r\n\r\n4. A hot short metal is\r\n(a) brittle when cold\r\n(b) brittle when hot\r\n(c) brittle under all conditions\r\n(d) ductile at high temperature\r\n(e) hard when hot.\r\nAns: b\r\n\r\n5. Guest's theory of failure is applicable for following type of materials\r\n(a) brittle \r\n(b) ductile\r\n(c) elastic \r\n(d) plastic\r\n(e) tough.\r\nAns: b\r\n\r\n6. Rankine's theory of failure is applicable for following type of materials\r\n(a) brittle \r\n(b) ductile\r\n(c) elastic \r\n(d) plastic\r\n(e) tough.\r\nAns: a\r\n\r\n7. If an unsupported uniform cross sectional elastic bar is subjected to a longitudinal impact from a rigid bob moving with velocity v, then a compressive wave of intensity sc is propagated through the bar as follows\r\n(a) vpE \r\n(b) vVvF\r\n(c) WpE\/2 \r\n(d) IvHpE\r\n(e) none of the above, where E = modulus of elasticity and p = mass density.\r\nAns: a\r\n\r\n8. Tensile strength of a mild steel specimen can be roughly predicted from following hardness test\r\n(a) Brinell \r\n(b) Rockwell\r\n(c) Vicker\r\n(d) Shore's sceleroscope\r\n(e) none of the above.\r\n\u00a0Ans: a\r\n\r\n9. Resilience of a material is important, when it is subjected to\r\n(a) combined loading\r\n(b) fatigue \r\n(c) thermal stresses\r\n(d) wear and tear\r\n(e) shock loading.\r\nAns: e\r\n\r\n\r\nModulus of Resilience\r\n\r\n\r\n10. In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by\r\n(a) decreasing \u00a0the cross-section area of' bar\r\n(b) increasing the cross-section area of bar\r\n(c) remain unaffected with cross-section area\r\n(d) would depend upon other factors\r\n(e) none of the above.\r\nAns: a\r\n\r\n11. .Other method of reducing shock load in the above case can be\r\n(a) to decrease length\r\n(b) to increase length\r\n(c) unaffected by length\r\n(d) other factors would decide same\r\n(e) none of the above.\r\nAns: b\r\n\r\n12. If a load W is applied instantaneously on a bar; then the stress induced in bar will\r\n(a) be independent of ratio of mass of load W to mass of bar (y)\r\n(b) increase with increase in y\r\n(c) decrease with decrease in y\r\n(d) depend on other considerations\r\n(e) none of the above.\r\nAns: a\r\n\r\n13. Brittle coating technique is used for\r\n(a) determining brittleness\r\n(b) protecting metal against corrosion\r\n(c) protecting metal against wear and tear\r\n(d) experimental stress analysis\r\n(e) non-destructive testing of metals.\r\nAns: d\r\n\r\n14. Stress concentration is caused due to\r\n(a) variation in properties of material from point to point in a member\r\n(b) pitting at'points or areas at which loads on a member are applied\r\n(c) abrupt change of section\r\n(d) all of the above\r\n(e) none of the above.\r\nAns: d\r\n\r\n15. The endurance limit of a material with finished surface in comparison to rough surface is\r\n(a) more\r\n(b) less\r\n(c) same\r\n(d) more or less depending on quantum of load\r\n(e) unpredictable.\r\nAns: a\r\n\r\n16. Plastic flow in ductile materials\r\n(a) increases the seriousness of static loading stress concentration\r\n(b) lessens the seriousness of static loading stress concentration\r\n(c) has no effect on it\r\n(d) depends on other considerations\r\n(e) none of the above.\r\nAns: b\r\n\r\n17. The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be\r\n(a) same in both cases\r\n(b) 2 times more\r\n(c) 3 times more\r\n(d) 4 times more\r\n(e) unpredictable.\r\nAns: c\r\n\r\n18. The fatigue life of a part can be improved by\r\n(a) electroplating\r\n(b) polishing\r\n(c) coating \r\n(d) shot peening\r\n(e) heat treating.\r\nAns: d\r\n\r\n19. Stress concentration in static loading is more serious in\r\n(a) ductile materials\r\n(b) brittle materials\r\n(c) equally serious in both cases\r\n(d) depends on other factors\r\n(e) unpredictable.\r\nAns: b20. Stress concentration in cyclic loading is more serious in\r\n(a) ductile materials\r\n(b) brittle materials\r\n(c) equally serious in both cases\r\n(d) depends on other factors\r\n(e) unpredictable.\r\nAns: a\r\n\r\n21. Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to\r\n(a) dynamic loading\r\n(b) static loading\r\n(c) combined static and dynamic loading\r\n(d) completely reversed loading\r\n(e) all of the above.\r\nAns: d\r\n\r\n22. Pick up wrong statement. Fatigue strength can be increased by\r\n(a) cold working\r\n(b) shot peening\r\n(c) grinding and lapping surface\r\n(d) hot working\r\n(e) using gradual changes of section.\r\nAns: d\r\n\r\n23. Which of the following is not correct procedure to increase the fatigue limit\r\n(a) cold working\r\n(b) shot peening\r\n(c) surface decarburisation\r\n(d) under-stressing\r\n(e) all of the above.\r\nAns: c\r\n\r\n24. Coaxing is the procedure of increasing\r\n(a) metal strength by cycling\r\n(b) metal hardness by surface treatment\r\n(c) metal resistance to corrosion by coating\r\n(d) fatigue limit by overstressing the metal by successively increasing loadings\r\n(e) none of the above.\r\nAns: d\r\n\r\n25. Which is correct statement ?\r\nStress concentration in static loading is\r\n(a) very serious in brittle materials and less serious in ductile materials\r\n(b) very serious in ductile materials and less serious in brittle materials\r\n(c) equally serious in both types of materials\r\n(d) seriousness \u00a0would depend on other factors\r\n(e) none of the above.\r\nAns: a\r\n\r\n26. The notch angle of the Izod impact test specimen is\r\n(a) 10\u00b0 \r\n(b) 20\u00b0\r\n(c) 30\u00b0 \r\n(d) 45\u00b0\r\n(e) 60\u00b0.\r\nAns: d\r\n\r\n27. In Vicker's hardness testing, the pyramid indentor apex is\r\n(a) 40\u00b0 \r\n(b) 122\u00b0\r\n(c) 136\u00b0 \r\n(d) 152\u00b0\r\n(e) 161\u00b0.\r\nAns: c\r\n\r\n28. Which is correct statement ?\r\nStress concentration in cyclic loading is\r\n(a) very serious in brittle materials and less serious in ductile materials\r\n(b) very serious in ductile materials and less serious in brittle materials\r\n(c) equally \u00a0 serious \u00a0 in \u00a0 both \u00a0 types \u00a0 of materials\r\n(d) seriousness would depend on other factors\r\n(e) none of the above.\r\nAns: c\r\n\r\n29. In testing a material for endurance strength, it is subjected to\r\n(a) static load\r\n(b) dynamic load\r\n(c) impact load\r\n(d) static as well as dynamic load\r\n(e) completely reversed load.\r\nAns: e\r\n\r\n30. If a material fails below its yield point, failure would be due to\r\n(a) straining \r\n(b) fatigue\r\n(c) creep \r\n(d) sudden loading\r\n(e) impact loading.\r\nAns: b\r\n\r\n31. The fatigue limit of a material\r\n(a) is greatly decreased by poor surface conditions\r\n(b) remains same irrespective of surface conditions\r\n(c) depends mainly on core composition\r\n(d) is dependent upon yield strength of material\r\n(e) none of the above.\r\nAns: a\r\n\r\n32. Cold working\r\n(a) increases the fatigue strength\r\n(b) decreases the fatigue strength\r\n(c) has no influence on fatigue strength\r\n(d) alone has \u00a0no \u00a0influence \u00a0on \u00a0fatigue strength\r\n(e) none of the above.\r\nAns: a\r\n\r\n33. Yield point in fatigue loading as compared to static loading is\r\n(a) same\r\n(b) higher\r\n(c) lower\r\n(d) depends on other factors\r\n(e) none of the above.\r\nAns: c\r\n\r\n34. Residual stress in materials\r\n(a) acts when external load is applied\r\n(b) becomes zero when external load is removed\r\n(c) is independent of external loads\r\n(d) is always harmful\r\n(e) is always beneficial.\r\n\u00a0Ans: c\r\n\r\n35. The building up of worn and uridersized parts, subjected to repeated loads by electroplating is\r\n(a) best method\r\n(b) extremely hazardous\r\n(c) has no effect as regards fatigue strength\r\n(d) cheapest method\r\n(e) all of the above.\r\nAns: a\r\n\r\n36. In nitrated parts, the origins of the fatigue cracks will occur at\r\n(a) surface\r\n(b) just below the surface\r\n(c) within the core\r\n(d) could occur anywhere\r\n(e) none of the above.\r\nAns: e\r\n\r\n37. Which process will increase the fatigue duration of parts ?\r\n(a) finishing and polishing\r\n(b) shot-peening\r\n(c) decarburisation\r\n(d) electroplating\r\n(e) all of the above\".\r\nAns: b\r\n\r\n38. Which is correct statement ?\r\n(a) a member made of steel will generally be more rigid than a member of equal load-carrying ability made of cast iron\r\n(b) a member made of cast iron will generally be. more rigid than a member of equal load carrying ability made of steel\r\n(c) both will be equally rigid\r\n(d) which one is rigid will depend on several other factors\r\n(e) none of the above.\r\nAns: b\r\n\r\n39. Resistance to fatigue of a material is measured by\r\n(a) Young's modulus\r\n(b) coefficient of elasticity\r\n(c) elastic limit\r\n(d) ultimate tensile strength\r\n(e) endurance limit.\r\nAns: e\r\n\r\n\r\n\r\nMachine Design MCQ : Part 1 | Part 2 | Part 3 | Part 4\u00a0\r\n\r\n\r\n\r\nMore Resources \/articles\r\nMechanical MCQ Objectives Question and Answers\r\nTechnical Mechanical Interview Question and Answers\r\nMachine Design Notes , article , Interview Que. and Ans.\r\nMechanical Subjectwise Basic Concept Notes ,Articles\r\n\r\n\r\n\r\n&nbsp;","headline":"Machine Design MCQ Objective Question and Answers Part 1","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2019-06-11","mainEntityOfPage":"False","dateModified":"February 18, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2019\/06\/les_mom_modulusofresilience_1.png","height":187,"width":265},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/ic-engine-mcq-objective-question-answers-part-2/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2019/06/what-is-compression-Ratio-300x164.jpg')"></div><span class="sr-only">link to IC Engine MCQ Objective Question and Answers Part 2</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/ic-engine-mcq-objective-question-answers-part-2/">IC Engine MCQ Objective Question and Answers Part 2</a></p></header><div class="excerpt"><p>IC Engine MCQ Objective Question and Answers Part 2
Internal Combustion Engine ( IC Engine ) Multiple Choice Question and Answers , MCQ Objective Question for Mechanical Engineering   IC Engine...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/ic-engine-mcq-objective-question-answers-part-2/" aria-label="View Post: IC Engine MCQ Objective Question and Answers Part 2">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"IC Engine MCQ Objective Question and Answers Part 2","url":"\/\/www.gunkrazy.com\/ic-engine-mcq-objective-question-answers-part-2\/","articleBody":"IC Engine MCQ Objective Question and Answers Part 2\r\nInternal Combustion Engine ( IC Engine ) Multiple Choice Question and Answers , MCQ Objective Question for Mechanical Engineering\u00a0\r\n\r\n\r\nIC Engine MCQ Objective : Part 1 | Part 2 | Part 3\u00a0\r\n\r\n\r\n\r\n\r\n&nbsp;\r\n\r\n31. Compression loss in I.C engines occurs due to\r\n(a) leaking piston rings\r\n(b) use of thick head gasket\r\n(c) clogged air-inlet slots\r\n(d) increase in clearance volume caused b bearing-bushing wear\r\n(e) all of the above.\r\nAns: e\r\n\r\n32. The specific fuel consumption per BH hour for a petrol engine is approximately\r\n(a) 0.15 kg\r\n(b) 0.2 kg\r\n(c) 0.25 kg\r\n(d) 0.3kg\r\n(e) 0.35 kg.\r\nAns: c\r\n\r\n33. The air requirement of a petrol engine during starting compared to theoretical air required for complete combustion is\r\n(a) more\r\n(b) loss\r\n(c) same\r\n(d) may be more or less depending on engine capacity\r\n(e)\u00a0 unpredictable.\r\nAns: b\r\n\r\n34. The inlet value of a four stroke cycle I.C engine remains open for nearly\r\n(a) 180\u00b0\r\n(b) 125\u00b0\r\n(c) 235\u00b0\r\n(d) 200\u00b0\r\n(e) 275\u00b0.\r\nAns: c\r\n\r\n35. Which of the following is not an interns combustion engine\r\n(a) 2-stroke petrol engine\r\n(b) 4-stroke petrol engine\r\n(c) diesel engine\r\n(d) gas turbine\r\n(e) steam turbine.\r\nAns: e\r\n\r\n36. Pick up the false statement\r\n(a) Thermal efficiency of diesel engine i about 34%\r\n(b) Theoretically correct mixture of air am petrol is approximately 15 : 1\r\n(c) High speed compression engines operate on dual combustion cycle\r\n(d) Diesel engines are compression ignition engines\r\n(e) S.I. engines are quality-governed engines.\r\nAns: e\r\n\r\n37. If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the\r\n(a) exhaust will be smoky\r\n(b) piston rings would stick into piston grooves\r\n(c) exhaust temperature will be high\r\n(d) engine starts overheating\r\n(e) scavenging occurs.\r\nAns: e\r\n\r\n38. The output of a diesel engine can be increased without increasing the engine revolution or size in following way\r\n(a) feeding more fuel\r\n(b) increasing flywheel size\r\n(c) heating incoming air\r\n(d) scavenging\r\n(e) supercharging.\r\nAns: e\r\n\r\n39. It the temperature of intake air in IC engines is lowered, then its efficiency will\r\n(a) increase\r\n(b) decrease\r\n(c) remain same\r\n(d) increase upto certain limit and then decrease\r\n(e) decrease upto certain limit and then in-crease.\r\nAns: a\r\n\r\n40. In a typical medium speed 4-stroke cycle diesel engine\r\n(a) compression starts at 35\u00b0 after bottom dead center and ends at top dead center\r\n(b) compression starts at bottom dead center and ends at top dead center\r\n(c) compression starts at 10\u00b0 before bottom dead center and, ends just before top dead center\r\n(d) may start and end anywhere\r\n(e) none of the above.\r\nAns: a\r\n\r\n41. For the same compression ratio\r\n(a) Otto cycle is more efficient than the Diesel\r\n(b) Diesel cycle is more efficient'than Otto\r\n(c) both Otto and Diesel cycles are, equally efficient\r\n(d) compression ratio has nothing to do with efficiency\r\n(e) which is more efficient would depend on engine capacity.\r\nAns: a\r\n\r\ncompression-Ratio\r\n\r\n42. \u00a0The process of breaking up or a liquid into fine droplets by spraying is called\r\n(a) vaporization \u00a0 \u00a0\u00a0\r\n(b) carburetion\r\n(c) ionisation\r\n(d) injection\r\n(e) atomisation.\r\nAns: e\r\n\r\n43. As a result of detonation in an I.C. engine, following parameter attains very high value\r\n(a) peak pressure\r\n(b) rate of rise of pressure\r\n(c) rate of rise of temperature \u00a0 \u00a0 \u00a0\r\n(d) peak temperature\r\n(e) rate of rise of horse-power.\r\nAns: b\r\n\r\n44. Which of the following statements is correct?\r\n(a) All the irreversible engines have same efficiency\r\n(b) All the reversible engines have same efficiency\r\n(c) Both Rankine and Caront cycles have same efficiency between same temperature limits\r\n(d) All reversible engines working between same temperature limits have same-efficiency\r\n(e) Between same temperature limits, both petrol and diesel engines have same efficiency.\r\nAns: d\r\n\r\n45. Most high speed compression engines operate on\r\n(a) Diesel cycle \u00a0 \u00a0\r\n(b) Otto cycle\r\n(c) Dual combustion cycle\r\n(d) Special type of air cycle\r\n(e) Carnot cycle.\r\nAns: c\r\n\r\n48. The accumulation of carbon in a cylinder results in increase of\r\n(a) clearance volume\r\n(b) volumetric efficiency\r\n(c) ignition time\r\n(d) effective compression ratio\r\n(e) valve travel time.\r\nAns: d\r\n\r\n49. Which of the following medium is compressed in a Diesel engine cylinder\r\n(a) air aione\r\n(b) air and fuel\r\n(c) air and lub oil\u00a0\r\n(d) fuel alone\r\n(e) air, fuel and lub oil.\r\nAns: a\r\n\r\n54. The air-fuel ratio of the petrol engine is controlled by\r\n(a) fuel pump \u00a0 \u00a0 \u00a0\u00a0\r\n(b) governor\r\n(c) injector\r\n(d) carburettor\r\n(e) scavenging.\r\nAns: d\r\n\r\n55. In a typical medium speed, 4-stroke cycle diesel engine\r\n(a) fuel injection starts at 10\u00b0 before to dead center and ends at 20\u00b0 after tor dead center\r\n(b) fuel injection starts at top dead center and ends at 20\u00b0 after top dead center\r\n(c) fuel injection starts at just before top dead center and ends just after top deac center\r\n(d) may start and end anywhere\r\n(e) none of the above.\r\nAns: a\r\n\r\n56. Diesel fuel, compared to petrol is\r\n(a) less difficult to ignite\r\n(b) just about the same difficult to ignite\r\n(c) more difficult to ignite\r\n(d) highly ignitable\r\n(e) none of the above.\r\nAns: c\r\n\r\n57. In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of\r\n(a) 250\u00b0C\r\n(b) 500\u00b0C\r\n(c) 1000\u00b0C\r\n(d) 150CPC\r\n(e) 2000\u00b0C.\r\nAns: c\r\n\r\n58. When crude oil is heated, then which of the following hydrocarbon is given off first.\r\n(a) kerosene\r\n(b) gasoline\r\n(c) paraffin\r\n(d) diesel\r\n(e) natural gas.\r\nAns: e\r\n\r\n59. The rating of a diesel engine, with increase in air inlet temperature, will\r\n(a) increase linearly\r\n(b) decrease linearly\r\n(c) increase parabolically\r\n(d) decrease parabolically\r\n(e) first decrease linearly and then increase parabolically.\r\nAns: b\r\n\r\n60. A 75 cc engine has following parameter as 75 cc\r\n(a) fuel tank capacity\r\n(b) lub oil capacity\r\n(c) swept volume\r\n(d) cylinder volume\r\n(e) clearance volume.\r\nAns: c\r\n\r\n61. A heat engine utilities the\r\n(a) calorific value of oil\r\n(b) low heat value of\r\n(c) high heat value of oil\r\n(d) mean heat value of oil\r\n(e) all of the above.\r\nAns: c\r\n\r\n62. Gaseous-fuel guarantees are based on\r\n(a) calorific value of oil\r\n(b) low heat value of oil\r\n(c) high heat value of oil\r\n(d) mean heat value of oil\r\n(e) all of the above.\r\nAns: b\r\n\r\n63. Fuel consumption of diesel engines is not guaranteed at one quarter load because at such low loads\r\n(a) the friction is high\r\n(b) the friction is unpredictable\r\n(c) the small difference in cooling water temperature or in internal friction has a disproportionate effect\r\n(d) the engine is rarely operated\r\n(e) none of the above.\r\nAns: c\r\n\r\n64. Polymerisation \u00a0is \u00a0a \u00a0chemical process \u00a0in which molecules of a compound become\r\n(a) larger\r\n(b) slowed down\r\n(c) smaller\r\n(d) liquid\r\n(e) gaseous.\r\nAns: a\r\n\r\n65. The term scavenging is generally associated with\r\n(a) 2-stroke cycle engines\r\n(b) 4-stroke cycle engines\r\n(c) aeroplane engines\r\n(d) diesel engines\r\n(e) high efficiency engines.\r\nAns: e\r\n\r\n66. In diesel engine, the compression ratio in comparison to expansion ratio is\r\n(a) same\r\n(b) less\r\n(G) more\r\n(d) variable\r\n(e) more\/less depending on engine capacity.\r\nAns: c\r\n\r\n67. The cam shaft of a four stroke I.C. engine running at 1500 rmp will run at\r\n(a) 1500 rpm\r\n(b) 750 rpm\r\n(c) 3000 rpm\r\n(d) any value independent of engine speed\r\n(e) none of the above.\r\nAns: b\r\n\r\n\r\nIC Engine MCQ Objective : Part 1 | Part 2 | Part 3\u00a0\r\n\r\n\r\n\r\n\r\nMore Resources \/articles\r\nMechanical MCQ Objectives Question and Answers\r\nTechnical Mechanical Interview Question and Answers\r\nIC Engine Articles , Notes , Question and Answer\r\nMechanical Subjectwise Basic Concept Notes ,Articles\r\nNew Mechanical Projects 2020 ( All Projects Post Index List )\r\n\r\n\r\n\r\n&nbsp;","headline":"IC Engine MCQ Objective Question and Answers Part 2","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2019-06-09","mainEntityOfPage":"False","dateModified":"February 18, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2019\/06\/what-is-compression-Ratio-300x164.jpg","height":164,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/ic-engine-mcq-question-answer-part-3/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2019/06/dual-cycle-300x209.jpg')"></div><span class="sr-only">link to IC Engine MCQ Objective Question and Answers Part 3</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/ic-engine-mcq-question-answer-part-3/">IC Engine MCQ Objective Question and Answers Part 3</a></p></header><div class="excerpt"><p>IC Engine MCQ Objective Question and Answers Part 3
Internal Combustion Engine ( IC Engine ) Multiple Choice Question and Answers , MCQ Objective Question for Mechanical Engineering   IC Engine...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/ic-engine-mcq-question-answer-part-3/" aria-label="View Post: IC Engine MCQ Objective Question and Answers Part 3">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"IC Engine MCQ Objective Question and Answers Part 3","url":"\/\/www.gunkrazy.com\/ic-engine-mcq-question-answer-part-3\/","articleBody":"IC Engine MCQ Objective Question and Answers Part 3\r\nInternal Combustion Engine ( IC Engine ) Multiple Choice Question and Answers , MCQ Objective Question for Mechanical Engineering\u00a0\r\n\r\n\r\nIC Engine MCQ Objective : Part 1 | Part 2 | Part 3\u00a0\r\n\r\n\r\n\r\n\r\n68. Engine pistons are usually made of aluminium alloy because it\r\n(a) is lighter\r\n(b) wears less\r\n(c) absorbs shocks\r\n(d) is stronger\r\n(e) does not react with fuel and lub oil.\r\nAns: a\r\n\r\n69. Most high speed compression engines operate on\r\n(a) Otto cycle\r\n(b) Diesel cycle\r\n(c) Dual cycle\r\n(d) Carnot cycle\r\n(e) Two stroke cycle.\r\nAns: c\r\n\r\ndual cycle\r\n\r\n70. The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is\r\n(a) same\r\n(b) more\r\n(c) less\r\n(d) less or more depending on operating conditions\r\n(e) unpredictable.\r\nAns: b\r\n\r\n71. A diesel engine as compared to petrol engine (both running are rated load) is\r\n(a) more efficient\r\n(b) less efficient\r\n(c) equally efficient\r\n(d) unperdictable\r\n(e) other factors will decide it.\r\nAns: a\r\n\r\n72. \u00a0The size of inlet valve of an engine in comparison to exhaust valve is\r\n(a) more\r\n(b) less\r\n(c) same\r\n(d) more\/less depending on capacity of engine\r\n(e) varies from design to design.\r\nAns: b\r\n\r\n74. In a cycle, the spark lasts roughly for\r\n(a) 1 sec\r\n(b) 0.1 sec\r\n(c) 0.01 sec\r\n(d) 0.001 sec\r\n(e) 0.0001 sec.\r\nAns: d\r\n\r\n75. Which of the following is false statement :\r\nExcess quantities of sulphur in diesel fuel are Objectionable because it may cause the following\r\n(a) piston ring and cylinder wear\r\n(b) formation of hard coating on piston skirts\r\n(c) oil sludge in the engine crank case\r\n(d) detonation\r\n(e) forms corrosive acids.\r\nAns: d\r\n\r\n76. Which of the following is false statement. Some of the methods used to reduce diesel smoke are as follows\r\n(a) using additives in the fuel\r\n(b) engine derating i.e. reducing the maxi-mum flow of fuel\r\n(c) increasing the compression ratio\r\n(d) adherence to proper fuel specification\r\n(e) avoidance of overloading.\r\nAns: c\r\n\r\n77. The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be\r\n(a) higher\r\n(b) lower\r\n(c) remain unaffected\r\n(d) unpredictable \u00a0\r\n(e) none of the above.\r\nAns: a\r\n\r\n78. Pick up the wrong statement about supercharging\r\n(a) supercharging reduces knocking in diesel engines\r\n(b) there can be limited supercharging in petrol engines because of detonation\r\n(c) supercharging at high altitudes is essential\r\n(d) supercharging results in fuel economy\r\n(e) supercharging is essential in aircraft engines.\r\nAns: d\r\n\r\n79. The actual volume of fresh charge admitted in 4-stroke petrol engine is\r\n(a) equal to stroke volume\r\n(b) equal to stroke volume and clearance volume\r\n(c) less than stroke volume\r\n(d) more than stroke volume\r\n(e) more than cylinder volume.\r\nAns: c\r\n\r\n80. The magneto in an automobile is basically\r\n(c) transformer \u00a0 \u00a0\u00a0\r\n(b) d.c. generator\r\n(c) capacitor\r\n(d) magnetic circuit\r\n(e) a.c. generator.\r\nAns: b\r\n\r\n81. The reason for supercharging in any engine is to\r\n(a) increase efficiency\r\n(b) increase power\r\n(c) reduce weight and bulk for a given out-put\r\n(d) effect fuel economy\r\n(e) none of the above.\r\nAns: c\r\n\r\n82. The operation of forcing additional air under pressure in the engine cylinder is known as\r\n(a) scavenging \u00a0 \u00a0 \u00a0\r\n(b) turbulence\r\n(c) supercharging\u00a0\r\n(d) pre-ignition\r\n(e) dissociation and carburetor of fuel.\r\nAns: c\r\n\r\n83. Supercharging is essential in\r\n(a) diesel engines\r\n(b) gas turbines\r\n(c) petrol engines\r\n(d) aircraft engines\r\n(e) marine engines.\r\nAns: d\r\n\r\n84. The minimum cranking speed in case of petrol engine is about\r\n(a) half the operating speed\r\n(b) one-fourth of operating speed\r\n(c) 250-300 rpm \u00a0 \u00a0\r\n(d) 60-80 rpm \u00a0 \u00a0\u00a0\r\n(e) 10-20 rpm\r\nAns: d\r\n\r\n85. In a typical medium speed 4 stroke cycle diesel engine\r\n(a) exhaust valve opens at 35\u00b0 before bot-tom dead center and closes at 20\u00b0 after top dead center\r\n(b) exhaust valve opens at bottom 'dead center and closes at top dead center\r\n(c) exhaust valve opens just after bottom dead center and closes just before top dead center\r\n(d) may open and close anywhere\r\n(e) none of the above is true.\r\nAns: a\r\n\r\n86. Flash point of fuel oil is\r\n(a) minimum temperature to which1 oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame\r\n(b) temperature at which it solidifies or congeals\r\n(c) temperature at which it catches fire without external aid\r\n(d) indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off\r\n(e) none of the above.\r\nAns: a\r\n\r\n87. The mean effective pressure obtained from engine indicator indicates the\r\n(a) maximum pressure developed\r\n(b) minimum pressure\r\n(c) instantaneous pressure at any instant\r\n(d) exhaust pressure\r\n(e) average pressure.\r\nAns: e\r\n\r\n88. For the same power developed in I.C. engines, the cheaper system is\r\n(a) naturally aspirated\r\n(b) supercharged\r\n(c) centrifugal pump\r\n(d) turbo charger\r\n(e) none of the above.\r\nAns: b\r\n\r\n89. Installation of supercharger on a four-cycle diesel engine can result in the following percentage increase in power\r\n(a) upto 25%\r\n(b) upto 35%\r\n(c) upto 50%\r\n(d) upto 75%\r\n(e) upto 100%.\r\nAns: e\r\n\r\n90. Scavenging is usually done to increase\r\n(a) thermal efficiency\r\n(b) speed\r\n(c) power output\r\n(d) fuel consumption\r\n(e) all of the above.\r\nAns: c\r\n\r\n&nbsp;\r\n\r\n91. Which of the following is the lightest and most volatile liquid fuel\r\n(a) diesel\r\n(b) kerosene\r\n(c) fuel oil\r\n(d) gasoline\r\n(e) lub oil.\r\nAns: d\r\n\r\n92. The theoretically correct air fuel ratio for petrol engine is of the order of\r\n(a) 6 : 1\r\n(b) 9 : 1\r\n(c) 12 : 1\r\n(d) 15 : 1\r\n(e) 20 : 1.\r\nAns: d\r\n\r\n93. Air fuel ratio for idling speed of a petrol engine is approximately\r\n(a) 1 : 1\r\n(b) 5 : 1\r\n(c) 10:1\r\n(d) 15 : 1\r\n(e) 20 : 1.\r\nAns: c\r\n\r\n94. Air fuel ratio at which a petrol engine can not work is\r\n(a) 8 : 1\r\n(b) 10 : 1\r\n(c) 15 : 1\r\n(d) 20 : 1 and less\r\n(e) will work at all ratios.\r\nAns: d\r\n\r\n95. For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of\r\n(a) 9 : 1\r\n(b) 12 : 1\r\n(c) 15 : 1\r\n(d) 18 : 1\r\n(e) 20: 1.\r\nAns: b\r\n\r\n96. The following volume of air is required for consuming 1 liter of fuel by a four stroke engine\r\n(a) 1 m3\r\n(b) 5 m3\r\n(c) 5-6 m3\r\n(d) 9-10 m3\r\n(e) 15-18 m3.\r\nAns: d\r\n\r\n97. Pour point of fuel oil is the\r\n(a) minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame\r\n(b) temperature at which it solidifies or congeals\r\n(c) it catches fire without external aid\r\n(d) indicated by 90% distillation temperature i.e., when 90% of sample oil has distilled off\r\n(e) temperature at which it flows easily.\r\nAns: b\r\n\r\n98. A 5 BHP engine running at full load would consume diesel of the order of\r\n(a) 0.3 kg\/hr\r\n(b) 1 kg\/hr\r\n(c) 3 kg\/hr\r\n(d) 5 kg\/hr\r\n(e) 10 kg\/hr.\r\nAns: b\r\n\r\n99. Diesel engine can work on very lean air fuel ratio of the order of 30 : 1. A petrol engine can also work on such a lean ratio provided\r\n(a) it is properly designed\r\n(b) best quality fuel is used\r\n(c) can not work as it is impossible\r\n(d) flywheel size is proper\r\n(e) engine cooling is stopped.\r\nAns: c\r\n\r\n100. A diesel engine has\r\n(a) 1 valve\r\n(b) 2 valves\r\n(b) 3 valves\r\n(d) 4 valves\r\n(e) no valve.\r\nAns: c\r\n\r\n&nbsp;\r\n\r\n\r\nIC Engine MCQ Objective : Part 1 | Part 2 | Part 3\u00a0\r\n\r\n\r\n\r\n\r\nMore Resources \/articles\r\nMechanical MCQ Objectives Question and Answers\r\nTechnical Mechanical Interview Question and Answers\r\nIC Engine Articles , Notes , Question and Answer\r\nMechanical Subjectwise Basic Concept Notes ,Articles\r\nNew Mechanical Projects 2020 ( All Projects Post Index List )\r\n\r\n\r\n\r\n&nbsp;","headline":"IC Engine MCQ Objective Question and Answers Part 3","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2019-06-09","mainEntityOfPage":"False","dateModified":"February 18, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2019\/06\/dual-cycle-300x209.jpg","height":209,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal no-thumb"><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/ic-engine-mcq-objective-question-and-answers-part-1/">IC Engine MCQ Objective Question and Answers Part 1</a></p></header><div class="excerpt"><p>IC Engine MCQ Objective Question and Answers Part 1 
Internal Combustion Engine ( IC Engine ) Multiple Choice Question and Answers , MCQ Objective Question for Mechanical Engineering   IC...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/ic-engine-mcq-objective-question-and-answers-part-1/" aria-label="View Post: IC Engine MCQ Objective Question and Answers Part 1">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"IC Engine MCQ Objective Question and Answers Part 1","url":"\/\/www.gunkrazy.com\/ic-engine-mcq-objective-question-and-answers-part-1\/","articleBody":"IC Engine MCQ Objective Question and Answers Part 1\u00a0\r\nInternal Combustion Engine ( IC Engine ) Multiple Choice Question and Answers , MCQ Objective Question for Mechanical Engineering\u00a0\r\n\r\n\r\nIC Engine MCQ Objective : Part 1 | Part 2 | Part 3\u00a0\r\n\r\n\r\n\r\n\r\n1. The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft\r\n(a) \u00a0 \u00a0 1\/2\r\n(b) \u00a0 \u00a0 1\r\n(c) \u00a0 \u00a0 2\r\n(d) \u00a0 \u00a0 4\r\n(e) \u00a0 \u00a0 8.\r\nAns: c\r\n\r\n2. In a diesel engine, the fuel is ignited by\r\n(a) spark\r\n(b) injected fuel\r\n(c) heat resulting from compressing air that is supplied for combustion\r\n(d) ignition\r\n(e) combustion chamber.\r\nAns: c\r\n\r\n3. Scavenging air in diesel engine means\r\n(a) air used for combustion sent under pres-sure\r\n(b) forced air for cooling cylinder\r\n(c) burnt air containing products of combustion\r\n(d) air used for forcing burnt gases out of engine's cylinder during the exhaust period\r\n(e) air fuel mixture.\r\nAns: d\r\n\r\n4. Supercharging is the process of\r\n(a) supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere\r\n(b) providing forced cooling air\r\n(c) injecting excess fuel for raising more load\r\n(d) supplying compressed air to remove combustion products fully\r\n(e) raising exhaust pressure.\r\nAns: a\r\n\r\nsupercharging\r\n\r\n5. Does the supply of scavenging air at a density greater than that of atmosphere mean engine is supercharged ?\r\n(a) yes\r\n(b) no\r\n(c) to some extent\r\n(d) unpredictable\r\n(e) depends on other factors.\r\nAns: b\r\n\r\n6. The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called\r\n(a) net efficiency\r\n(b) efficiency ratio\r\n(c) relative efficiency\r\n(d) overall efficiency\r\n(e) cycle efficiency.\r\nAns: c\r\n\r\n7. Compression ratio of LC. engines is\r\n(a) the ratio of volumes of air in cylinder before compression stroke and after compression stroke\r\n(b) volume displaced by piston per stroke and clearance volume in cylinder\r\n(c) ratio of pressure after compression and before compression\r\n(d) swept volume\/cylinder volume\r\n(e) cylinder volume\/swept volume.\r\nAns: a\r\n\r\n8. The air standard efficiency of an Otto cycle compared to diesel cycle for the given compression ratio is\r\n(a) same\r\n(b) less\r\n(c) more\r\n(d) more or less depending on power rating\r\n(e) unpredictable.\r\nAns: c\r\n\r\n9. The calorific value of gaseous fuels is expressed in terms of\r\n(a) \u00a0 \u00a0 kcal\r\n(b) \u00a0 \u00a0 kcal\/kg\r\n(c) \u00a0 \u00a0 kcal\/m2\r\n(d) \u00a0 \u00a0 kcal\/n2\r\n(e) \u00a0 \u00a0 all of the above.\r\nAns: d\r\n\r\n11. If the intake air temperature of I.C. engine increases, its efficiency will\r\n(a) \u00a0 \u00a0 increase\r\n(b) \u00a0 \u00a0 decrease\r\n(c) \u00a0 \u00a0 remain same \u00a0\u00a0\r\n(d) \u00a0 \u00a0 unpredictable\r\n(e) \u00a0 \u00a0 depend on other factors.\r\nAns: b\r\n\r\n12. All heat engines utilize\r\n(a) low heat value of oil\r\n(b) high heat value of oil\r\n(c) net claorific value of oil\r\n(d) calorific value of fuel\r\n(e) all of the above.\r\nAns: a\r\n\r\n13. An engine indicator is used to determine the following\r\n(a) speed\r\n(b) temperature\r\n(c) volume of cylinder\r\n(d) m.e.p. and I.H.P.\r\n(e) BHP.\r\nAns: d\r\n\r\n14. Fuel oil consumption guarantees for I .C. engine are usually based on\r\n(a) low heat value of oil\r\n(b) high heat value of oil\r\n(c) net calorific value of oil\r\n(d) calorific value of fuel\r\n(e) all of the above.\r\nAns: b\r\n\r\n17. If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the %age increase in efficiency will be\r\n(a) 2%\r\n(b) 4%\r\n(c) 8%\r\n(d) 14%\r\n(e) 27%.\r\nAns: d\r\n\r\n18. In case of gas turbines, the gaseous fuel consumption guarantees are based on\r\n(a) high heat value\r\n(b) low heat value\r\n(c) net calorific value\r\n(d) middle heat value\r\n(e) calorific value.\r\nAns: b\r\n\r\n19. In a typical medium speed 4-stroke cycle diesel engine the inlet valve\r\n(a) opens at 20\u00b0 before top dead center and closes at 35\u00b0 after the bottom dead center\r\n(b) opens at top dead center and closes at bottom dead center\r\n(c) opens at 10\u00b0 after top dead center and closes 20\u00b0 before the bottom dead center\r\n(d) may open or close anywhere\r\n(e) remains open for 200\u00b0.\r\nAns: a\r\n\r\n20. The pressure and temperature at the end of compression stroke in a petrol engine are of the order of\r\n(a)\u00a0 4 - 6 kg\/cm2 and 200 - 250\u00b0C\r\n(b) 6 - 12 kg\/cm2 and 250 - 350\u00b0C\r\n(c) 12 - 20 kg\/cm2 and 350 - 450\u00b0C\r\n(d) 20 - 30 kg\/cm2 and 450 - 500\u00b0C\r\n(e) 30 - 40 kg\/cm2 and 500 - 700\u00b0C.\r\nAns: b\r\n\r\n21. The pressure at the end of compression in the case of diesel engine is of the order of\r\n(a) 6 kg\/cm\r\n(b) 12kg\/cmz\r\n(c) 20 kg\/cmz \u00a0 \u00a0 \u00a0\u00a0\r\n(d) 27.5 kg\/cmz\r\n(e) 35 kg\/cm\r\nAns: e\r\n\r\n22. The maximum temperature in the I.C. engine cylinder is of the order of\r\n(a) 500- 1000\u00b0C\r\n(b) 1000- 1500\u00b0C\r\n(c) 1500-2000\u00b0C\r\n(d) 2000-2500\u00b0C\r\n(e) 2500-3000\u00b0C\r\nAns: d\r\n\r\n23. The thermal efficiency of a diesel cycle having fixed compression ratio, with increase in cut-off ratio will\r\n(a) increase\r\n(b) decrease\r\n(c) be independent\r\n(d) may increase or decrease depending on other factors\r\n(e) none of the above.\r\nAns: b\r\n\r\n24. Pick up the wrong statement\r\n(a) 2-stroke engine can run in any direction\r\n(b) In 4-stroke engine, a power stroke is obtained in 4-strokes\r\n(c) thermal efficiency of 4-stroke engine is more due to positive scavenging\r\n(d) petrol engines work on otto cycle\r\n(e) petrol engines occupy more space than diesel engines for same power output.\r\nAns: e\r\n\r\n25. Combustion in compression ignition engines is\r\n(a) homogeneous\r\n(b) heterogeneous\r\n(c) both (a) and (b)\r\n(d) laminar\r\n(e) turbulent.\r\nAns: b\r\n\r\n26. The fuel in diesel engine is normally injected at pressure of\r\n(a) 5-10 kg\/cm2 \u00a0 \u00a0\r\n(b) 20-25 kg\/cm2\r\n(c) 60-80 kg\/cm2 \u00a0\r\n(d) 90-130 kg\/cm2\r\n(e) 150-250 kg\/cm2\r\nAns: d\r\n\r\n27. The specific fuel consumption per BHP hour for diesel engine is approximately\r\n(a) 0.15 kg\r\n(b) 0.2 kg\r\n(c) 0.25 kg\r\n(d) 0.3 kg\r\n(e) 0.35 kg.\r\nAns: b\r\n\r\n28. The temperature of interior surface of cylinder wall in normal operation is not allowed to exceed\r\n(a) 80\u00b0C\r\n(b) 120\u00b0C\r\n(c) 180\u00b0C\r\n(d) 240\u00b0C\r\n(e) 320\u00b0C.\r\nAns: c\r\n\r\n30. Crankcase explosion in I.C. engines usually occurs as\r\n(a) first a mild explosion followed by a bi explosion\r\n(b) first a big explosion followed by a mil explosion\r\n(c) both mild and big explosions occi simultaneously\r\n(d) never occurs\r\n(e) unpredictable.\r\nAns: a\r\n\r\n\r\nIC Engine MCQ Objective : Part 1 | Part 2 | Part 3\u00a0\r\n\r\n\r\n\r\n\r\nMore Resources \/articles\r\nMechanical MCQ Objectives Question and Answers\r\nTechnical Mechanical Interview Question and Answers\r\nIC Engine Articles , Notes , Question and Answer\r\nMechanical Subjectwise Basic Concept Notes ,Articles\r\nNew Mechanical Projects 2020 ( All Projects Post Index List )\r\n\r\n\r\n\r\n&nbsp;","headline":"IC Engine MCQ Objective Question and Answers Part 1","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2019-06-09","mainEntityOfPage":"False","dateModified":"February 18, 2020","image":{"@type":"ImageObject","url":"","height":0,"width":0},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/engineering-mechanics-mcq-objective-question-and-answers-part-4/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2019/06/Kinetic-Friction-300x165.jpg')"></div><span class="sr-only">link to Engineering Mechanics MCQ Objective Question and Answers Part 4</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/engineering-mechanics-mcq-objective-question-and-answers-part-4/">Engineering Mechanics MCQ Objective Question and Answers Part 4</a></p></header><div class="excerpt"><p>Engineering Mechanics MCQ Objective Question and Answers Part 4
Engineering Mechanics Multiple Choice Questions / Objectives Mechanical Questions and Answers   Engineering Mechanics MCQ  :...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/engineering-mechanics-mcq-objective-question-and-answers-part-4/" aria-label="View Post: Engineering Mechanics MCQ Objective Question and Answers Part 4">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Engineering Mechanics MCQ Objective Question and Answers Part 4","url":"\/\/www.gunkrazy.com\/engineering-mechanics-mcq-objective-question-and-answers-part-4\/","articleBody":"Engineering Mechanics MCQ Objective Question and Answers Part 4\r\nEngineering Mechanics Multiple Choice Questions \/ Objectives Mechanical Questions and Answers\u00a0\r\n\r\n\r\n\r\n\r\nEngineering Mechanics MCQ\u00a0 : Part 1 | Part 2 | Part 3 | Part 4\u00a0\r\n\r\n\r\n\r\n\r\n\r\n\r\n92. Tangent of angle of friction is equal to\r\n(a) kinetic friction\r\n(b) limiting friction\r\n(c) angle of repose\r\n(d) coefficient of friction\r\n(e) friction force.\r\nAns: d\r\n\r\n93. Kinetic friction is the\r\n(a) tangent of angle between normal reaction and the resultant of normal reaction and the limiting friction\r\n(b) ratio of limiting friction and normal reaction\r\n(c) the friction force acting when the body is just about to move\r\n(d) the friction force acting when the body is in motion\r\n(e) dynamic friction.\r\nAns: d\r\n\r\nKinetic Friction\r\n\r\n95. The effort required to lift a load W on a screw jack with helix angle a and angle of friction &lt;j) is equal to\r\n(a) W tan(a + &lt;)&gt;)\r\n(b) W tan(a-&lt;)&gt;)\r\n(c) W cos(a + &lt;t&gt;)\r\n(d) W sin(a + &lt;(&gt;)\r\n(e) W (sin a + cos &lt;j&gt;).\r\nAns: a\r\n\r\n96. A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is \\i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will\r\n(a) remain horizontal\r\n(b) slant up towards direction of pull\r\n(c) slant down towards direction of pull\r\n(d) unpredictable\r\n(e) none of the above.\r\nAns: c\r\n\r\n97. A particle inside a hollow sphere of radius r, having coefficient of friction\u00a0 can rest upto height of\r\n(a) r\/2 \r\n(b) r\/A\r\n(c) r\/% \r\n(d) 0.134 r\r\n(e) 3r\/8.\r\nAns: d\r\n\r\n98. The algebraic sum of moments of the forces forming couple about any point in their plane is\r\n(a) equal to the moment of the couple\r\n(b) constant\r\n(c) both of above are correct\r\n(d) both of above are wrong\r\n(e) none of the above.\r\nAns: a\r\n\r\n99. A single force and a couple acting in the same plane upon a rigid body\r\n(a) balance each other\r\n(b) cannot balance each other\r\n(c) produce moment of a couple\r\n(d) are equivalent\r\n(e) none of the above.\r\nAns: b\r\n\r\n100. If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either\r\n(a) meet in a point\r\n(b) be all parallel\r\n(c) at least two of them must meet\r\n(d) all the above are correct\r\n(e) none of the above.\r\nAns: d\r\n\r\n101. The maximum frictional force which comes into play when a body just begins to slide over another surface is called\r\n(a) limiting friction\r\n(b) sliding friction\r\n(c) rolling friction\r\n(d) kinematic friction\r\n(e) dynamic friction.\r\nAns: a\r\n\r\n102. The co-efficient of friction depends upon\r\n(a) nature of surfaces\r\n(b), area of contact\r\n(c) shape of the surfaces\r\n(d) ail of the above.\r\n(e) (a) and (b) above.\r\nAns: a\r\n\r\n104. The necessary condition for forces to be in equilibrium is that these should be\r\n(a) coplanar\r\n(b) meet at one point ;\r\n(c) both (a) and (b) above\r\n(d) all be equal\r\n(e) something else.\r\nAns: c\r\n\r\n105. If three forces acting in different planes can be represented by a triangle, these will be in\r\n(a) non-equilibrium\r\n(b) partial equilibrium\r\n(c) full equilibrium\r\n(d) unpredictable\r\n(e) none of the above.\r\nAns: a\r\n\r\n106. If n = number of members and y = number of joints, then for a perfect frame, n =\r\n(a) j-2 \r\n(b) 2j-l\r\n(c) 2\/-3 \r\n(d) 3\/-2\r\n(e) 2\/ -4.\r\nAns: c\r\n\r\n107. A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly\r\n(a) 38 m \r\n(b) 62.5 m\r\n(C) 96 m \r\n(d) 124 m\r\n(e) 240 m.\r\nAns: b\r\n\r\n108. A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to\r\n(a) 25 \r\n(b) 50\r\n(c) 100 \r\n(d) 250\r\n(e) 500.\r\nAns: b\r\n\r\n109. Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one\r\n(a) ellipse \r\n(b) hyperbola\r\n(c) parabola \r\n(d) circle\r\n(e) none of the above.\r\nAns: b\r\n\r\n111. Which of the following is not the unit of energy\r\n(a) kg m \r\n(b) kcal\r\n(c) wattr \r\n(d) watt hours\r\n(e) kg m x (m\/sec)2.\r\nAns: c\r\n\r\n112. A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal\r\n(a) density of metal can't be determined\r\n(b) metal is twice as dense as water\r\n(c) metal will float in water\r\n(d) metal is twice as dense as unknown fluid\r\n(e) none of the above.\r\nAns: a\r\n\r\n113. The C.G. of a solid hemisphere lies on the central radius 3r\r\n(a) at distance \u2014 from the plane base 3r\r\n(b) at distance \u2014 from the plane base 3r\r\n(c) at distance \u2014 from the plane base 3r\r\n(d) at distance \u2014 from the plane base or\r\n(e) at distance \u2014 from the plane base.\r\nAns: d\r\n\r\n117. The C.G. of a plane lamina will not be at its geometrical centre in the case of a\r\n(a) right angled triangle\r\n(b) equilateral triangle\r\n(c) square \r\n(d) circle\r\n(e) rectangle.\r\nAns: a\r\n\r\n119. The C.G. of a right circular solid cone of height h lies at the following distance from the base\r\n(a) h\/2 \r\n(b) J\/3\r\n(c) h\/6 \r\n(d) h\/4\r\n(e) 3\/i\/5.\r\nAns: d\r\n\r\n122. The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is\r\n(a) same \r\n(b) double\r\n(c) half \r\n(d) four times\r\n(e) one fourth.\r\nAns: b\r\n\r\n126. Which of the following is the example of lever of first order\r\n(a) arm of man\r\n(b) pair of scissors\r\n(c) pair of clinical tongs\r\n(d) all of the above\r\n(e) none of the above.\r\nAns: d\r\n\r\n127. A pair of smith's tongs is an example of the lever of\r\n(a) zenith order\r\n(b) first order\r\n(c) second order\r\n(d) third order\r\n(e) fourth order.\r\nAns: c\r\n\r\n128. In the lever of third order, load W, effort P and fulcrum F are oriented as follows\r\n(a) W between P and F\r\n(b) F between W and P\r\n(c) P between W and F\r\n(d) W, P and F all on one side\r\n(e) none of the above.\r\nAns: a\r\n\r\n129. The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of\r\n(a) friction \r\n(b) limiting friction\r\n(c) repose \r\n(d) kinematic friction\r\n(e) static friction.\r\nAns: c\r\n\r\n130. In actual machines\r\n(a) mechanical advantage is greater than velocity ratio\r\n(b) mechanical advantage is equal to velocity ratio\r\n(c) mechanical advantage is less than velocity ratio\r\n(d) mechanical advantage is unity\r\n(e) none of the above.\r\nAns: c\r\n\r\n131. In ideal machines\r\n(a) mechanical advantage is greater than velocity ratio\r\n(b) mechanical advantage is equal to velocity ratio\r\n(c) mechanical advantage is less than velocity ratio\r\n(d) mechanical advantage is unity\r\n(e) none of the above.\r\nAns: b\r\n\r\n136. A cable with a uniformly distributed load per horizontal meter run will take the following shape\r\n(a) straight line\r\n(b) parabola\r\n(c) hyperbola\r\n(d) elliptical\r\n(e) part of a circle.\r\nAns: b\r\n\r\n\r\n\r\nEngineering Mechanics MCQ\u00a0 : Part 1 | Part 2 | Part 3 | Part 4\u00a0\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nMore Resources \/articles\r\nMechanical MCQ Objectives Question and Answers\r\nStrength of material- Notes , articles , Interview Que. &amp; Ans\r\nTechnical Mechanical Interview Question and Answers\r\nMechanical Subjectwise Basic Concept Notes ,Articles\r\n\r\n\r\n\r\n&nbsp;","headline":"Engineering Mechanics MCQ Objective Question and Answers Part 4","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2019-06-08","mainEntityOfPage":"False","dateModified":"February 18, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2019\/06\/Kinetic-Friction-300x165.jpg","height":165,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <nav class="pagination-wrapper" aria-label="article pagination"> <a class="prev page-numbers" href="?page_num=35">&laquo; PREV</a> <a class="page-numbers" href="?page_num=1"><span class="screen-reader-text">Page </span>1</a> <span class="page-numbers dots">&hellip;</span> <a class="page-numbers" href="?page_num=34"><span class="screen-reader-text">Page </span>34</a> <a class="page-numbers" href="?page_num=35"><span class="screen-reader-text">Page </span>35</a> <span aria-current="page" class="page-numbers current"><span class="screen-reader-text">Page </span>36</span> <a class="page-numbers" href="?page_num=37"><span class="screen-reader-text">Page </span>37</a> <a class="page-numbers" href="?page_num=38"><span class="screen-reader-text">Page </span>38</a> <span class="page-numbers dots">&hellip;</span> <a class="page-numbers" href="?page_num=338"><span class="screen-reader-text">Page </span>338</a> <a class="next page-numbers" href="?page_num=37">NEXT &raquo;</a></nav></section></main><aside id="secondary" class="widget-area"><div class="about-wrapper"><h2 class="widget-title" style="background: #d693c6; color: #ff392e">About Us</h2><div class="about-image" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2020/03/Sachin-Thorat-300x300-min.png')"></div><p class="about-copy">LearnMech.Com is a Mechanical Project-oriented platform run by Sachin Thorat who is a B-Tech Graduate in Mechanical Engineering. 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