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Theory of Machine

Theory of Machine
The Coriolis component of acceleration leads the sliding velocity by

45°
90°
180°
135°

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Theory of Machine
The acceleration of the particle moving with simple harmonic motion is _________ at the mean position.

Maximum
Zero
None of these
Minimum

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Theory of Machine
The critical speed of a shaft depends upon its

Mass and stiffness
Mass
Stiffness
Stiffness and eccentricity

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Theory of Machine
Which one of the following is an exact straight line mechanism using lower pairs?

Grasshopper mechanism
Robert’s mechanism
Watt’s mechanism
Peaucellier’s mechanism

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Theory of Machine
The frictional torque transmitted in a flat pivot bearing, considering uniform wear, is (where μ = Coefficient of friction, W = Load over the bearing, and R = Radius of bearing surface)

(3/4) μ W R
(2/3) μ W R
μ W R
(1/2) μ W R

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Theory of Machine
Cross head and guides form a

Sliding pair
Higher pair
Turning pair
Lower pair

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