Engineering Metrology Practice Test 3

1. For full interchangeability, what is the relation between the process capability of a machine and manufacturing tolerance of the part?

Process capability ≥ Manufacturing tolerance

Process capability = Manufacturing tolerance

Process capability > Manufacturing tolerance

Process capability ≤ Manufacturing tolerance

2. What is the colour of the band at ‘no go’ side of plain gauges?

Yellow

Green

Blue

Red

3. What is mean clearance?

Average of both size of shaft and hole

Minimum size of hole minus minimum size of shaft

Mean size of hole minus mean size of shaft

Maximum size of hole minus maximum size of shaft

4. ‘Go limit’ applied to which limit condition?

Lower limit of shaft and upper limit of hole

Moderate material limit

Maximum material limit

Minimum material limit

5. What is the value of hardness for plug and ring gauges used for self-holding tapers?

750 to 860 HV

550 to 740 HV

120 to 540 HV

900 to 1200 HV

6. What is the first step of QA?

Development of standards

Identification of customer need

Servicing

Material control

7. What is important in testing a tapered job?

Change of diameter per unit length

Change in length per unit weight

Check the diameter at smaller end

Change of diameter per unit mass

8. Which of the following option is correct regarding anvils of ‘adjustable type gap gauges’?

Gauging anvil has both sliding and rotating movement

Anvils are of non-adjustable type

Gauging anvil has only sliding movement

Gauging anvil has only rotating movement

9. Which of the following is incorrect about tolerances?

Too loose tolerance results in less cost

Tolerance is a compromise between accuracy and ability

Fit between mating components is decided by functional requirements

Too tight tolerance may result in excessive cost

10. Up to which length of gauges, there is no appreciable change in length with a method of support?

100 mm

200 mm

75 mm

150 mm