1. How much overall length is available for feeler gauge blades?
a) 50 mm
b) 30 mm
c) 70 mm
d) 100 mm
Explanation: The overall length available for the blades is 100 mm. and thickness of blades generally varies from 0.03 to 1 mm.
2. Which if the following option is correct for given statements?
Statement 1: Feeler gauge can be used to check clearance between cylinder and piston.
Statement 2: The working of feeler gauges is completely depended on the sense of feel.
a) Statement 1 is true but statement 2 is not true
b) Statement 2 is true but statement 1 is not true
c) Both the statements are not true
d) Both the statements are true
Explanation: The feeler gauge is not forced in the gap and it should not slide freely. For a perfect working, gauge should give a ‘’gauge fit’’ type of feel.
3. What is the maximum variation in thickness of a feeler gauge blade of 0.3 mm thick blade?
a) 0.04
b) 0.05
c) 0.06
d) 0.07
Explanation: Maximum variation in thickness for feeler gauge blades up to the thickness of 0.03 mm including 0.03 should not exceed 0.04 mm. For blades over 0.3 mm, this variation is 0.006 mm.
4.According to BIS, What is the thickness of feeler gauge blades for set number 1?
a) 0.3 to 0.1
b) 0.03 to 0.1
c) 0.05 to 0.3
d) 0.5 to 0.3
Explanation: Set number 1 has 8 blades in the set with a thickness of blades from 0.03 to 0.1 in steps of 0.01.
5. Which of the following option is correct for given statements?
Statement 1: The series of feeler gauge blades are of thicknesses from 0.03 to 1 mm.
Statement 2: Feeler gauge blades are non-removable and are assembled in a protective sheath.
a) T, F
b) F, T
c) T, T
d) F, F
Explanation: Feeler gauge blades are hinged on a screw and nut. So, they are removable in nature. They are assembled in a protective sheath which protects the blades when they are not in use.
6. What is the width of feeler gauge blades (in mm) at heel and tip respectively?
a) 12, 6
b) 5, 11
c) 20, 15
d) 15, 25
Explanation: Blades are 6 mm wide at tip and width at the heel is 12 mm. Width is less at the tip because they are tapered for the outer part of their length.
7. 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 the 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.
8. How 34’ can be built by using angle gauges?
a) 27’+9’-3’+1’
b) 26’+10’-2’
c) 27’+10’-3’
d) 27’+8’
Explanation: Combinations can be made by only three series of angle gauges. Minutes series is with 1’, 3’, 9’, 27’ angle gauges.
9. In how many series the gauges can be divided?
a) 1
b) 2
c) 3
d) 4
Explanation: 16 or 13 Gauges can be divided into 3 series i.e. degree, minutes and seconds (fraction of minute).
10. 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.