Mechanical Engineering - Machine Design

1. 

The rolling contact bearings are known as

A. thick lubricated bearings
B. plastic bearings
C. thin lubricated bearings
D. antifriction bearings

Answer: Option D

Explanation:

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2. 

The backlash for spur gears depends upon

A. module
B. pitch line velocity
C. tooth profile
D. both (a) and (b)

Answer: Option D

Explanation:

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3. 

The size of a gear is usually specified by

A. pressure angle
B. pitch circle diameter
C. circular pitch
D. diametral pitch

Answer: Option B

Explanation:

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4. 

The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are εc and εl respectively. The change in volume of the boiler cylinder per unit volume will be

A. εc + 2εl
B. c + εl
C. εc + εl2
D. εc2 + εl

Answer: Option B

Explanation:

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5. 

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

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

Answer: Option B

Explanation:

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