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Machine Design

Machine Design
Rankine's theory of failure is applicable for following type of materials

Elastic
Ductile
Plastic
Brittle

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Machine Design
Idler pulley is used for

All of these
Increasing velocity ratio
Changing the direction of motion of belt
For applying tension

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Machine Design
Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be

2
8
16
4

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Machine Design
The rolling contact bearings as compared to sliding contact bearings have

All of these
Low starting and low running friction except at very high speeds
Small overall dimensions
Accuracy of shaft alignment

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Machine Design
When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be _________ the bearing modulus.

5 times
10 times
15 times
20 times

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Machine Design
According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by

2 mm for rivet diameter from 39 mm to 48 mm
All of these
1 mm for rivet diameter from 27 mm to 36 mm
0.5 mm up to rivet diameter of 24 mm

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