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Theory of Machine

Theory of Machine
When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to

Zero
One
π
π/2

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Theory of Machine
Throw of a cam is the maximum distance of the follower from

Root circle
Pitch circle
Prime circle
Base circle

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Theory of Machine
Idler pulley is used

For increasing velocity ratio
For changing the direction of motion of the belt
All of the listed here
For applying tension

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Theory of Machine
Efficiency of a screw jack is given by

tan (α - φ)/tanα
tanα/tan (α - φ)
tanα/tan (α +φ)
tan (α + φ)/tanα

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Theory of Machine
A kinematic chain is known as a mechanism when

One of the links is fixed
None of the links is fixed
None of these
Two of the links are fixed

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Theory of Machine
The factor which affects the critical speed of a shaft is

Eccentricity
Span of shaft
Diameter of disc
All of the listed here

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