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Machine Design

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

90°
75°
45°
60°

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

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

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

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

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Machine Design
A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

6 kN/m
12 kN/m
30 kN/m
24 kN/m

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Machine Design
The power transmitted by belt drive depends upon

Arc of contact
Belt velocity
Initial belt tension
All of these

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Machine Design
The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under load W will be

43869
44045
43929
44047

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