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Machine Design

Machine Design
The diameter of the rivet hole is usually __________ the nominal diameter of the rivet.

None of these
Less than
Equal to
More than

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Machine Design
The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

3/ (3 + v)
6/ (6 + v)
0.75/ (0.75 + √v)
4.5/ (4.5 + v)

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Machine Design
The belt slip occurs due to

Loose belt
Heavy load
Driving pulley too small
Any one of the above

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Machine Design
In the levers of first type, the mechanical advantage is ________ one.

None of these
Equal to
Less than
More than

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Machine Design
Oldham coupling is used to connect two shafts

Which have lateral misalignment
Whose axes intersect at a small angle
Which are perfectly aligned
Which are not in exact alignment

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Machine Design
For hardening alloy steels and high speed steels, they are heated to

1300 to 1500°C
700 to 900°C
500 to 600°C
1100 to 1300°C

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