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Machine Design

Machine Design
Ball bearing type screws are found in following application

Crane
Screw jack
Steering mechanism
Aeroplane engines

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Machine Design
The building up of worn and undersized parts, subjected to repeated loads by electroplating is

Cheapest method
Extremely hazardous
Best method
Has no effect as regards fatigue strength

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Machine Design
Stress concentration in cyclic loading is more serious in

Ductile materials
Equally serious in both cases
Depends on other factors
Brittle materials

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Machine Design
Oldham coupling is used to connect two shafts

Which are not in exact alignment
Which have lateral misalignment
Whose axes intersect at a small angle
Which are perfectly aligned

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

29°
55°
60°
47.5°

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Machine Design
The width of the pulley should be __________ width of the belt.

Greater than
Equal to
None of these
Less than

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