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Theory of Machine

Theory of Machine
The secondary unbalanced force is __________ the primary unbalanced force.

n times
One-half
1/n times
Two-third

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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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Theory of Machine
Which type of gearing is used in steering system of an automobile?

Worm and wheel
Spiral gears
Rack and pinion
None of the listed here

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Theory of Machine
Efficiency of a screw jack is given by

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

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Theory of Machine
The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.

Less than
Equal to
None of these
Greater than

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Theory of Machine
If ω/ωn is very low for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

180°
360°
0°
90°

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