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Machine Design

Machine Design
The groove angle of pulleys for V-belt is

420 to 450
340 to 360
300 to 320
More than 400

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Machine Design
A screw is said to be over hauling screw, if the

Friction angle is equal to helix angle
Friction angle is less than helix angle
Friction angle is more than helix angle
Efficiency of screw is 100%

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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)

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

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Machine Design
The helix angle for double helical gears may be made up to

90°
45°
60°
75°

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Machine Design
The coefficient of friction between the belt and pulley depends upon the

Speed of belt
All of these
Slip of belt
Material of belt and pulley

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Machine Design
The maximum shear stress theory is used for

Ductile materials
Plastic materials
Nonferrous materials
Brittle materials

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MORE MCQ ON Machine Design

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