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Machine Design

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

More than
None of these
Less than
Equal to

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Machine Design
The suitable material for belt in agricultural machinery is

Rubber
Leather
Cotton duck
Balata gum

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Machine Design
For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be

6
8
4
10

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Machine Design
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to

1.5 × diameter of bolt
1.25 × diameter of bolt
Diameter of bolt
0.75 × diameter of bolt

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Machine Design
The maximum efficiency of a square threaded screw is

(1 + cosφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + cosφ)
(1 + sinφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + sinφ)

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Machine Design
Buttress threads are usually found on

Feed mechanisms
Screw cutting lathes
Spindles of bench vices
Railway carriage couplings

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