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Machine Design

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
0.5 d
d
1.25 d

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Machine Design
The minimum number of teeth on the pinion which will mesh with any gear without interference for 20° full depth involute teeth will be

12
24
14
18

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

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

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Machine Design
The property of a material which enables it to be drawn into wires with the application of a tensile force, is called

Elasticity
Plasticity
Ductility
Malleability

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Machine Design
The included angle for the British Association thread is

29°
55°
47.3°
60°

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

None of these
Less than
More than
Equal to

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