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Machine Design

Machine Design
A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.

None of these
Greater
Smaller
Medium

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Machine Design
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is

Equal
Larger
Smaller
Larger/smaller depending on diameter of spring coil

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Machine Design
The constant factor in case of R10 series of preferred numbers is

1.06
1.26
1.58
1.12

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Machine Design
In order to withstand resistance to wear, the best profile of gear is

14½° stub tooth
20° full depth involute tooth
14½° full depth involute tooth
20° involute stub tooth

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Machine Design
A metal pipe of 1 m diameter contains a fluid having a pressure of 1 N/mm². If the permissible tensile stress in the metal is 20 N/mm², then the thickness of the metal required for making the pipe will be

10 mm
5 mm
25 mm
15 mm

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Machine Design
For steel, the ultimate strength in shear as compared to ultimate strength in tension is

43834
43832
43833
43864

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