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Machine Design

Machine Design
Which is positive drive?

V belt drive
Flat belt drive
Timing belt
Crossed belt drive

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Machine Design
When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as

Angular bevel gears
Internal bevel gears
Crown bevel gears
Mitre gears

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Machine Design
The objective of caulking in a riveted joint is to make the joint

Stronger in tension
Leak-proof
Free from corrosion
Free from stress

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Machine Design
According to Indian standards, a bolt thread of 6 mm size of coarse pitch and with allowance on the threads and normal tolerance grade is designated as

M8 - 6d
M6 - 8d
M6
M8

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Machine Design
In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.

None of these
Smaller than
Equal to
Larger than

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Machine Design
When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)

0.75 d
1.25 d
0.5 d
d

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