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Theory of Machine

Theory of Machine
The type of gears used to connect two non parallel and non intersecting shafts is

Spur gear
Helical gear
Bevel gear
Spiral gear

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Theory of Machine
Governor is used in automobile to

Limit the vehicle speed
Maintain constant engine speed
Maximize the fuel economy
Decrease the variation of speed

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Theory of Machine
The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is(Where μ = Coefficient of friction, W=Load over the bearing, R=Radius of bearing)

¾μWR
μwr
½μWR
²/₃ μWR

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Theory of Machine
The amplitude of vibration is always __________ the radius of the circle.

Less than
Equal to
None of these
Greater than

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Theory of Machine
The instantaneous centers which vary with the configuration of mechanism are called

None of these
Permanent instantaneous centers
Fixed instantaneous centers
Neither fixed nor permanent instantaneous centers

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Theory of Machine
Flexible coupling is used because

It transmits shocks gradually
It is easy to disassemble
It is easy to engage and disengage
It prevents shock transmission and eliminates stress reversals

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