Mechanical Engineering - Machine Design

21. 

The velocity of sliding __________ the distance of the point of contact from the pitch point.

A. is directly proportional to
B. is inversely proportional to
C. is equal to cos φ multiplied by
D. does not depend upon

Answer: Option A

Explanation:

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22. 

A column is known as a long column if the slenderness ratio is

A. 40
B. 50
C. 70
D. 100

Answer: Option D

Explanation:

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23. 

Circumferential joint in boilers is used to get the required length of a boiler.

A. True
B. False

Answer: Option A

Explanation:

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24. 

The ball bearings are provided with a cage

A. to reduce friction
B. to facilitate slipping of balls
C. to prevent the lubricant from flowing out
D. to maintain the balls at a fixed distance apart

Answer: Option D

Explanation:

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25. 

When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be

A. square threads
B. acme threads
C. knuckle threads
D. buttress threads

Answer: Option D

Explanation:

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