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Machine Design

Machine Design
Which of the following material has the maximum ductility?

Copper
Aluminium
Zinc
Mild steel

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Machine Design
A tapered key which fits in a key way in the hub and is flat on the shaft, is known as

Wood ruff key
Gib-head key
Feather key
Flat saddle key

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Machine Design
Factor of safety for fatigue loading is the ratio of

Elastic limit to the working stress
Young's modulus to the ultimate tensile strength
Endurance limit to the working stress
Elastic limit to the yield point

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Machine Design
The material commonly used for crane hooks is

Cast iron
Mild steel
Aluminium
Wrought iron

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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
A saddle key __________ power through frictional resistance only.

Does not transmit
None of these
Transmits
Either A or B

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