线性和角度测量|计量面试问题和答案

线性和角度测量|Metrology Interview , Viva, Oral Question and Answers

1.制造滑动仪的同时考虑因素是什么？

The following additional operations are carried out to obtain the necessary qualities in slip gauges during manufacture.

首先，通过初步操作完成滑动仪的近似尺寸。
2. The blocks are hardened and wear resistant by a special heat treatment process.
3. To stabilize the whole life of blocks, seasoning process is done.
4. The approximate required dimension is done by a final grinding process.

2. How do you calibrate the slip gauges?

比较器用于校准滑动仪。

3. List the various linear measurements?

（i）长度。
（ii）高度和
(iii) Thickness.

4. What are the various types of linear measuring instruments?

用于测量线性测量的各种设备是
一世。游标卡尺。
ii. Micrometers.
iii. Slip gauge or gauge blocks.
IV。比较器。

5.List out any four angular measuring instrument used in metrology.

(i) Angle gauges.
（ii）分裂尺度。
(iii) Sine bar with slip gauges.
（iv）自动调用剂。
(v) Angle dekkor.

6. Classify the comparator according to the principles used for obtaining magnification.

常见类型是：
（i）机械比较器。
(ii) Electrical comparators.
(iii) Optical comparators.
（iv）气动比较器。

7.什么是比较者？

比较器是一种形式的线性测量装置，可以快速更方便地检查大量相同尺寸。

阅读更多：什么是计量中的比较器|比较器分类

8. How the mechanical comparator works?

在所有机械比较器中放大小运动的方法通过杠杆，齿轮列车或这些元素的组合实现。

9. State the best example of a mechanical comparator.

拨号指示器或拨号仪用作机械比较器。

10. Define least count and mention the least count of a mechanical comparator.

Least count. –可以使用任何已知最小计数的任何测量仪器测量的最小值。最小计数的机械比较器为0.01mm。

11.如何使用机械比较器？与任何一个例子的州。

让我们假设组件I S 32.5mm的所需高度。最初，这种高度建立在滑动仪表中。滑动量块置于拨号计的杆下。拨号仪中的指针调整为零。现在移除滑动仪表，待检查的部件在表盘仪的杆下引入。如果组件的高度存在任何偏差，则将由指针指示。

12.说明REED型机械比较器的任何四种优点。

(i) It is usually robust, compact and easy to handle.
（ii）电力等外部供应，需要空气。
（iii）与其他类型相比，它具有非常简单的机制，更便宜。
(iv) It is suitable for ordinary workshop and also easily portable.

13.提及芦苇型机械比较器的任何两个缺点。

（i）比较器的精度主要取决于机架和小齿轮装置的准确性。任何松弛都会降低准确性。
(ii) It has more moving parts and hence friction is more and accuracy is less.

14.电气比较器的主要类型是什么？

电气比较器包括以下三个主要部件，如
（i）换能器。
(ii) Display device as meter.
(iii) Amplifier.

15. On what basis the transducer works?

在一端由叶子弹簧保持的两个线圈之间提供铁衔铁。另一端被支撑在柱塞上。两个线圈充当A.C.小麦石桥电路的两个臂。

16.检查电气比较器的准确性如何？

To check the accuracy of a given specimen or work, first a standard specimen is placed under the plunger. After this, the resistance of wheat stone bridge is adjusted that the scale reading shows zero. Then the specimen is removed. Now, the work is introduced under the plunger.

17. State the working principle of an electronic comparator.

在电子比较器中，换电器诱导或频率调制或无线电振荡的应用原理。

18.提及电子比较器的重要部分。

（i）换能器。
(ii) Oscillator.
(iii) Amplifier.
(iv) Demodulator.
(v) Meter.

19. Classify pneumatic comparators.

（i）流动或速度类型。
(ii) Back pressure type.

20. What are the advantages of electrical and electronic comparator?

(i) It has less number of moving parts.
(ii) Magnification obtained is very high.
(iii) Two or more magnifications are provided in the same instrument to use various ranges.
（iv）指针是非常光的，使其对振动更敏感。

21.电气和电子比较器的缺点是什么？

(i) External agency is required to meter for actuation.
（ii）电压或频率的变化可能影响输出的精度。
(iv) Due to heating coils, the accuracy decreases.
(v) It is more expensive than mechanical comparator.

22.列出光学比较器的各个部分。

光学比较器包括以下部分，如

（i）枢转杠杆。
（ii）物镜
（iii）规模。
(iv) Plunger.
（iv）表
(v) Base.

23. What are the advantages of pneumatic comparators?

(i) The wear of measuring heads is avoided due to absence of direct contact.
(ii) Friction is less due to less number of moving parts.
(iii) Work piece is cleaned by supplying of all during the measurement.
（iv）可以高放大率。
(v) There is no interference of measuring head and indicating device because the measuring head is kept away from the indicating device.
(vi) It is a suitable method to check taperness of circular bore.