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Machine Design MCQ Question with Answer

Machine Design MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 36
Which of the following statement is correct?

The distance from a point on one thread to the corresponding point on the next thread is called pitch
The distance which a screw thread advances axially in one rotation of the nut is called lead
In single start threads, lead is equal to pitch
All of the above
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Question No : 37
In designing a connecting rod, it is considered like __________ for buckling about X-axis.

Both ends hinged
Both ends fixed
One end fixed and the other end hinged
One end fixed and the other end free
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Question No : 38
Three different weights fall from a certain height under vacuum. They will take

Same time to reach earth
Times proportional to weight to reach earth
Times inversely proportional to weight to reach earth
None of the above
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Question No : 39
When a close coiled helical spring is compressed, its wire is subjected to

Tension
Shear
Compression
All of the above
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Question No : 40
According to I.B.R., when the thickness of boiler shell (t) is greater than 8 mm, then the diameter of rivet hole (d) is obtained by

Equating tearing resistance of the plate to the shearing resistance of the rivets
Equating tearing resistance of the plate to the crushing resistance of the rivets
Equating shearing resistance to the crushing resistance of the rivets
None of the above
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Question No : 41
A bolt of M 24 × 2 means that

The pitch of the thread is 24 mm and depth is 2 mm
Cross-sectional area of the threads is 24 mm²
The nominal diameter of bolt is 24 mm and pitch is 2 mm
The effective diameter of bolt is 24 mm and there are 2 threads per cm
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Question No : 42
In a partial journal bearing, the angle of contact of the bearing with the journal is

120°
180°
270°
360°
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