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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.

Medium
None of these
Greater
Smaller

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Machine Design
A type of brake commonly used in motor cars is a

Band brake
Internal expanding brake
Shoe brake
Band and block brake

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Machine Design
A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

3.5
2.8
2.5
3

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Machine Design
The connecting rod bolts are tightened up with initial tension greater than the external load so that

Bolts will not loosen during service
Joint may not open up
The resultant load on the bolt would not be affected by the external cyclic load
Bolts are weakest elements

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Machine Design
Two shafts A and B are made of the same material. The diameter of shaft A is twice as that of shaft B. The power transmitted by the shaft A will be __________ of shaft B.

Twice
Sixteen times
Eight times
Four times

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Machine Design
The root angle of a bevel gear is equal to

Pitch angle + addendum angle
Pitch angle - addendum angle
Pitch angle - dedendum angle
Pitch angle + dedendum angle

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