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Machine Design

Machine Design
The material used for brake lining should have __________ coefficient of friction.

Moderate
Low
High
None of these

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Machine Design
A column is known as a long column if the slenderness ratio is

40
50
70
100

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

Equal to
More than
None of these
Less than

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Machine Design
The piston pin bearings in heavy duty diesel engines are

Cylindrical roller bearings
Tapered roller bearings
Needle roller bearings
Spherical roller bearings

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Machine Design
The notch angle of the Izod impact test specimen is

30°
10°
20°
45°

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Machine Design
When a hole of diameter ‘d’ is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where τu = Ultimate shear strength of the material of the plate)

π/4 × d².τu
t.τu
π/4 × d² × tτu
πd.t.τu

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