Engineering Metrology MCQs

Question 1

In an interferometer experiment, following pattern of fringes was observed. The surface being tested is

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(d) ridge/valley in the middle

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Fig. 29

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(b) convex

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(c) convave

Question 2

If the interference bands with optical flat are as shown in Fig. 30, the surface would be

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Convex

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Concave

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Ridge

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Progressively convex

Question 3

A scale in which the distance between graduations is proportional to the value of that graduation is called

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Linear scale

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Equidistant scale

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Regular scale

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Scale with a constant value of graudation

Question 4

Profilometer is an instrument used to measure

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Surface roughness

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Gear involute

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Thread profile

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Taper

Question 5

The value of a set of data at which the greatest number of cases is concentrated is called

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Mode.

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Mean

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Range

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Standard deviation

Question 6

If the correctness of profile of a thread is to be checked, which instrument would you choose

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Optical projector.

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Bench micrometer

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Sine bar

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Telescopic gauge

Question 7

The more sensitive instrument

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Oscillates more slowly

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First oscillates more

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Has no oscillations

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Is never stable

Question 8

Frequency of oscillation of an instrument indicating device is a function of

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Both damping and sensitivity

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Mass

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Damping

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Sensitivity

Question 9

The lost motion of the spindle in micrometer screw gauge when the rotation of the thimble is changed in direction is referred to as

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Backlash

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Wear

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Least count

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Total error