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Machine Design

Machine Design
If a material fails below its yield point, failure would be due to

Sudden loading
Straining
Fatigue
Creep

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Machine Design
The lead angle of a worm is 22.5°. Its helix angle will be

67.5°
22.5°
90°
45°

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Machine Design
The railway carriage couplings have

Acme threads
Knuckle threads
Square threads
Buttress threads

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Machine Design
The bending stress in a curved beam is

None of these
Maximum at the neutral axis
Zero at the point other than centroidal axis
Zero at the centroidal axis

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Machine Design
A crankshaft is a __________ shaft.

Transmission
Machine frame
Machine
None of these

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Machine Design
Creep in belt is due to

Uneven extensions and contractions due to varying tension
Material of the belt
All of these
Material of the pulley

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