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Theory of Machine

Theory of Machine
The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.

Sum
Ratio
Product
Difference

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Theory of Machine
The component of the acceleration, parallel to the velocity of the particle, at the given instant is called

Coriolis component
Tangential component
None of these
Radial component

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

180°
90°
45°
135°

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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
The ratio of the driving tensions for V-belts is __________ times that of flat belts.(Where β = Semi-angle of the groove)

cosβ
secβ
sinβ
cosecβ

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Theory of Machine
When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be

Stable
Unstable
Isochronous
Hunt

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