This set of Engineering Metrology Multiple Choice Questions & Answers (MCQs) focuses on “Angle Gauges”.
1. Which of the following option is incorrect with respect to angle gauges?
a) Sine bar is better than angle gauges
b) Angle gauges are made of high carbon high chromium steel
c) Angle gauges can measure angle from 0 to 360 degrees
d) They are available in two sets of 13 and 16 gauges
Explanation: Angle gauges are more accurate than sine bar as it involves trigonometric functions.
2. How 34’ can built by using angle gauges?
Explanation: Combinations can be made by only three series of angle gauges. Minutes series is with 1’, 3’, 9’, 27’ angle gauges.
3. In how many series the gauges can be divided?
Explanation: 16 or 13 Gauges can be divided into 3 series i.e. degree, minutes and seconds (fraction of minute).
4. What is the approximate size of angle gauges?
a) 76mm long and 16 wide
b) 85mm long and 26 wide
c) 16mm long and 75 wide
d) 70mm long and 18 wide
Explanation: Angle gauges are about 3 inch (76.2 mm) long and 5/8 inch (15.87 mm) wide. And their faces are lapped within 0.0002 mm.
5. What is the accuracy of master angle gauges?
a) 0.1 sec
b) 1 sec
c) 0.25 sec
d) 3 sec
Explanation: Master Angle gauges are laboratory standard and most expensive of all. They measure the angle with an accuracy of 0.25 sec.
6. Which gauges are present in first series (degree) of angle gauges?
a) 5°, 10°, 15°, 25° and 40°
b) 1°, 3°, 9°, 27° and 41°
c) 1°, 5°, 9°, 25° and 45°
d) 5°, 10°, 15°, 30° and 45°
Explanation: The standard angles gauges have 5 gauges present in first series. They consist of 1°, 3°, 9°, 27° and 41° gauges.
7. How many sets of angle gauges are available?
Explanation: Two sets of angle gauges are available. One set with 16 gauges with accuracy of 1’’ and one set with 13 gauges with 3’’.
8. Which of the following option is true for the given statements?
Statement 1: Any angle up to 120o4’2’’ be made by direct combination of angle gauges.
Statement 2: Interferometry can be used to calibrate angle gauges.
a) T, F
b) F, F
c) F, T
d) T, T
Explanation: Direct combination of angle gauges can be made up to angle 81o40.9’. For larger angle, square block is used with angle gauges.
9. What are the two grades of angle gauges?
a) Master and tool room
b) Precise and Normal
c) Standard and Industrial
d) High and low
Explanation: Master grade are laboratory standard and made from steel carbide or tungsten carbide. Tool grade is normal industrial purpose angle gauges made from steel.
10. How angle greater than 90° is measured?
a) By repeating gauges
b) Using square plate
c) Using sine bar
d) Using auto collimator
Explanation: Versatility of angle gauges increases when used with square plate. Square plates with angle gauge can measure angle greater than 90o.
11. Which of the following is not a gauge from standard B angle gauges?
Explanation: Standard A has 13 gauges and standard B has all gauges from standard A except 0.05’ i.e. 12 gauges.
Sanfoundry Global Education & Learning Series – Engineering Metrology.
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