Metrology
JKSSB Junior Engineer (Mechanical) · Metrology and Automobile Engineering · 33 practice questions with answers and explanations: 5 Easy, 28 Medium, 0 Hard.
Sample questions
Sample Easy question 1
The vernier caliper is used for measuring:
- external and internal dimensions and depths
- only angles
- only surface roughness
- only thread pitch
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Answer: A. It has jaws and a depth rod.
Sample Easy question 2
The least count of a standard vernier calliper is usually:
- 1 mm
- 0.5 mm
- 0.2 mm
- 0.02 mm
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Answer: D. Many verniers have a least count of 0.02 mm, or 0.1 mm on simple ones.
Sample Easy question 3
The least count of a standard micrometer screw gauge is:
- 1 mm
- 0.01 mm
- 0.1 mm
- 0.001 mm
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Answer: B. The pitch is 0.5 mm with 50 divisions on the thimble.
Sample Medium question 4
A 'Go' gauge checks the:
- surface finish
- minimum material limit
- roundness
- maximum material limit of the part
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Answer: D. The Go end should pass, the No-Go should not.
Sample Medium question 5
Interchangeability in manufacture is made possible by:
- limits, fits and tolerances
- extra material on every part
- only skilled fitters
- hand fitting
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Answer: A. Parts made to the limits assemble without selection.
Sample Medium question 6
A clearance fit is one in which the shaft is:
- always smaller than the hole
- always larger than the hole
- equal to the hole
- sometimes larger than the hole
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Answer: A. There is always a gap between the mating parts.