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Theory of Machine

Theory of Machine
The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.

None of these
Same as
More than
Less than

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

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

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Theory of Machine
When the primary direct crank of a reciprocating engine makes an angle of 'θ' with the line of stroke, then the secondary direct crank will make an angle of _________ with the line of stroke.

4θ
θ
θ/2
2θ

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

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

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Theory of Machine
Cylindrical cams can be classified as

Circular
Tangent
Reciprocating
None of these

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Theory of Machine
A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by (where μ = tan φ = Coefficient of friction between the plane and the body)

P = W (cos α + μ sin α)
P = W tan (α + φ)
P = W (sin α + μ cos α)
P = W tan α

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