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Machine Design

Machine Design
The product of the diametral pitch and circular pitch is equal to

1
π
1/π
π × number of teeth

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Machine Design
When the belt is transmitting maximum power, the belt speed should be(Where, m = mass of belt per meter (kg/m) and Pmax = maximum permissible tension in belt (N))

√(3m /Pmax)
√(Pmax / m)
√(Pmax / 3m)
√(Pmax / 2m)

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Machine Design
Wahl's stress factor __________ very rapidly as the spring index decreases.

None of these
Remain same
Increases
Decreases

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Machine Design
The design of the pressure vessel is based on

Longitudinal stress
Longitudinal and hoop stress
None of these
Hoop stress

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Machine Design
A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as,

Hollow saddle key
Soft key
Hollow key
None of these

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Machine Design
The power transmitted by belt drive depends upon

All of these
Initial belt tension
Arc of contact
Belt velocity

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