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Theory of Machine

Theory of Machine
A pulley and belt in a belt drive form a

Rolling pair
Cylindrical pair
Turning pair
Sliding pair

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Theory of Machine
If ω/ωn is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

90°
180°
360°
0°

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Theory of Machine
A rotary internal combustion engine has __________ cylinders.

Four
Five
Seven
Six

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Theory of Machine
The centre of gravity of a coupler link in a four bar mechanism will experience

Only linear acceleration
Only angular acceleration
Both linear and angular acceleration
No acceleration

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Theory of Machine
The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m). (dx/dt) + (s/m). x = 0. If the roots of this equation are real, then the system will be

Critically damped
Under damped
Without vibrations
Over-damped

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Theory of Machine
When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a

Higher pair
Force-closed pair
Self-closed pair
Lower pair

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