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Machine Design

Machine Design
The ratio of endurance limit in shear to the endurance limit in flexure is

0.4
0.5
0.55
0.33

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Machine Design
The arms of the pulleys for flat belt drive have

Major axis twice the minor axis
Elliptical cross-section
All the three characteristics
Major axis in plane of rotation

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Machine Design
According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be

45 to 60%
80 to 90%
63 to 70%
70 to 83%

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

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

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Machine Design
In order to remove internal stresses produced by hardening the steel, the process usually adopted is

Normalizing
Annealing
Tempering
Spheroidizing

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Machine Design
In a steam engine, the piston rod is usually connected to the cross-head by means of a

Knuckle joint
Universal joint
Cotter joint
Oldham coupling

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