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Theory of Machine

Theory of Machine
Pulley in a belt drive acts as

Cylindrical pair
Turning pair
Sliding pair
Rolling pair

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Theory of Machine
In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)

(r₁ - r₂) (y/x)
(r₁ - r₂) (x/y)
(r₁ + r₂) (y/x)
(r₁ + r₂) (x/y)

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Theory of Machine
In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)

P = W cos(α + φ)
P = W tan(α - φ)
P = W tan(φ - α)
P = W tan(α + φ)

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Theory of Machine
In its simplest form, a cam mechanism consists of following number of links

2
4
1
3

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Theory of Machine
When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a

Meyer's expansion valve
Flywheel
D-slide valve
Governor

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Theory of Machine
The periodic time of a compound pendulum is __________ when the distance between the point of suspension and the center of gravity is equal to the radius of gyration of the body about its center of gravity.

Zero
None of these
Maximum
Minimum

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