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Machine Design

Machine Design
The included angle in unified of American National threads is

60°
55°
47°
29°

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Machine Design
The groove angle of pulleys for V-belt is

340 to 360
More than 400
420 to 450
300 to 320

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Machine Design
When the material of key and shaft is same, and the width of key is one-fourth of the diameter of shaft (d), then length of key will be

1.2 d
1.8 d
1.57 d
0.8 d

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Machine Design
When two non-parallel or intersecting but coplanar shafts are connected by gears, the arrangement is known as,

None of these
Helical gearing
Bevel gearing
Worm gearing

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Machine Design
The velocity of sliding __________ the distance of the point of contact from the pitch point.

Is inversely proportional to
Is equal to cos φ multiplied by
Does not depend upon
Is directly proportional to

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Machine Design
The square threads are usually found on

Feed mechanism of machine tools
Railway carriage couplings
Spindles of bench vices
Screw cutting lathes

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