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Theory of Machine

Theory of Machine
The approximate straight line mechanism is a

6 bar linkage
Four bar linkage
3 bar linkage
8 bar linkage

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Theory of Machine
The locus of a point on a thread unwound from a cylinder will be

A straight line
A circle
Involute
Cycloidal

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Theory of Machine
The equation of free vibrations of a system is (d²x/dt²) +36 π²x, its natural frequency is

3π Hz
6π Hz
3 Hz
6 Hz

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Theory of Machine
If ‘D₁’ and ‘D₂’ be the diameters of driver and driven pulleys, then belt speed is proportional to

D₁.D₂
D₂/D₁
D₁
D₁/D₂

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Theory of Machine
In Meyer's expansion valve, the main valve is driven by an eccentric having an angle of advance from

15°-25°
10°-15°
30°-40°
25°-30°

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Theory of Machine
Longitudinal vibrations are said to occur when the particles of a body moves

In a circle about its axis
None of these
Parallel to its axis
Perpendicular to its axis

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