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Machine Design

Machine Design
The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is

1
4
2
43832

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Machine Design
The taper on cotter varies from

1 in 15 to 1 in 10
1 in 24 to 1 in 20
1 in 48 to 1 in 24
1 in 32 to 1 in 24

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Machine Design
The longitudinal joint in boilers is used to get the required

Length and diameter of boiler
Efficiency of boiler
Diameter of boiler
Length of boiler

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Machine Design
Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that

Shaft A is better than shaft B
None of these
Both the shafts are equally good
Shaft B is better than shaft A

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Machine Design
The included angle for the British standard whitworth thread is

55°
47.5°
29°
60°

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Machine Design
The centrifugal tension in belts

Increase the wrap angle
Increases the power transmitted
Decreases the power transmitted
Increases the belt tension without increasing power transmission

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