Engineering Metrology MCQs

Question 1

The normal chordal tooth thickness of a gear is the shortest distance from the

Accepted Answer

Tooth crest to the mid point of the chord

Answer

Tooth crest to the point of the chord

Answer

Mid point of the constant chord to the tip of the tooth

Answer

From the tooth crest to any point on the chord

Question 2

Addendum of a gear is equal to

Accepted Answer

0.3183 p

Answer

Pitch p

Answer

0.3 p

Answer

0.3683 p

Question 3

Optical flats are used in conjunction with

Accepted Answer

Interferrometric measurement

Answer

Angular measurements

Answer

Surface flatness

Answer

Surface parallelism

Question 4

In the phenomenon of optical interference, the two beams of light, both originating from the same source, can cause interference patterns when the path difference between them amounts to

Accepted Answer

An odd half-wavelength of the light being used

Answer

1 micron

Answer

1 mm

Answer

One wavelength of the light being used

Question 5

A 20 mm diameter international metric thread will have a pitch of

Accepted Answer

2.5 mm.

Answer

1 mm

Answer

1.50 mm

Answer

2.0 mm

Question 6

Wear allowance is provided on

Accepted Answer

Go gauge

Answer

No Go gauge

Answer

Both Go and No Go gauges

Answer

When both are combined in one gauge

Question 7

Which of the following gauge is of full form

Accepted Answer

Go gauge

Answer

No Go gauge

Answer

Snap gauge

Answer

Thread gauge

Question 8

Taylor's principle is cocerned with

Accepted Answer

Gauging measurements

Answer

Pneumatic comparators

Answer

Interferometric measurements

Answer

Angular measurements

Question 9

Accuracy of setting a sine bar

Accepted Answer

Decreases appreciably with steep angle

Answer

Is poor for smaller angles

Answer

Is maximum when angle of measurement is 45?

Answer

Is dependent on accuracy of outer dimensions of sine bar