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Theory of Machine

Theory of Machine
The lower pair is a

Closed pair
Open pair
Sliding pair
Point contact pair

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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

25°-30°
30°-40°
10°-15°
15°-25°

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Theory of Machine
The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the

Pitch curve
Base circle
Pitch circle
Prime circle

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Theory of Machine
The critical speed of a shaft in revolution per second is __________ as that of natural frequency of transverse vibration.

Different
None of these
Same
Unpredictable

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Theory of Machine
The fundamental equation for correct steering is (where φ and α = Angle through which the axis of the outer wheel and inner wheel turns respectively, c = Distance between the pivots of the front axles, and d = Wheel base)

cosφ - sinα = c/b
sinφ + sinα = b/c
cotφ - cotα = c/b
tanφ + cotα = b/c

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Theory of Machine
In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is

90°
0°
270°
180°

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