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Machine Design

Machine Design
The included angle for the British Association thread is

29°
60°
47.3°
55°

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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

16
2
8
4

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Machine Design
The design of the pressure vessel is based on

Longitudinal and hoop stress
None of these
Hoop stress
Longitudinal stress

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Machine Design
At low temperatures (say 75°C) the notched bar impact value of steel

Depends on heat treatment carried out
Remain same
Increases markedly
Decreases markedly

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

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

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Machine Design
In skew bevel gearing, the axes of shafts are

None of these
Intersecting and the teeth are curved
Non-intersecting and non-parallel and the teeth are straight
Non-intersecting and nonparallel and the teeth are curved

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