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Theory of Machine

Theory of Machine
The brake commonly used in railway trains is

Band and block brake
Shoe brake
Band brake
Internal expanding brake

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Theory of Machine
The C.G. of a link in any mechanism would experience

Both angular and linear accelerations
No acceleration
Angular acceleration
Linear acceleration

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Theory of Machine
The secondary unbalanced force is maximum __________ in one revolution of the crank.

Eight times
Two times
Four times
Sixteen times

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Theory of Machine
The example of successfully constrained motion is a

Motion of an I.C. engine valve
Piston reciprocating inside an engine cylinder
Motion of the shaft between a footstep bearing
All of these

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Theory of Machine
The acceleration of a particle at any instant has two components i.e. radial component and tangential component. These two components will be

Perpendicular to each other
Parallel to each other
Opposite to each other
Inclined at 45°

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Theory of Machine
A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when

a is +ve and b is also +ve
a is +ve and b = 0
a is +ve and b is -ve
a = 0 and b is +ve

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