Mechanical Engineering - Machine Design

1. 

Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating force P (P < F) is applied to the lower plate, which in turn acts on the nut. The tension in the both after this is

A. F + P
B. F - P
C. P
D. F

Answer: Option A

Explanation:

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2. 

The bearings of medium series have capacity __________ over the light series.

A. 10 to 20%
B. 20 to 30%
C. 30 to 40%
D. 40 to 50%

Answer: Option C

Explanation:

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3. 

The antifriction bearings

A. have low starting and low running friction at moderate speeds
B. have high initial cost
C. can carry both radial and thrust loads
D. all of these

Answer: Option D

Explanation:

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4. 

In a partial journal bearing, the angle of contact of the bearing with the journal is

A. 120°
B. 180°
C. 270°
D. 360°

Answer: Option A

Explanation:

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5. 

A shaft coupling should

A. be easy to connect or disconnect
B. transmit full power of the shaft
C. hold the shafts in perfect alignment
D. all of these

Answer: Option D

Explanation:

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