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Theory of Machine

Theory of Machine
The velocity of the belt for maximum power is (where m = Mass of the belt in kg per meter length)

√(3m/T)
(T.g)/3
T/3
√(T/3m)

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Theory of Machine
When the pitching of a ship is __________ the effect of gyroscopic couple acting on it will be to move the ship towards port side.

Backward
Forward
Downward
Upward

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Theory of Machine
A simple spring-mass vibrating system has a natural frequency of fn. If the spring stiffness is halved and the mass is doubled, then the natural frequency will become

fn/2
8 fn
4 fn
2 fn

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Theory of Machine
The primary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is

0° and 90°
90° and 180°
0° and 180°
180° and 360°

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Theory of Machine
When the relation between the controlling force (Fc) and radius of rotation (r) for a spring controlled governor is Fc = ar + b, then the governor will be

Stable
Unstable
Isochronous
None of these

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Theory of Machine
The motion between a pair which takes place in ____ is known as incompletely constrained motion.

Two directions only
More than one direction
None of the listed here
One direction only

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