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Theory of Machine

Theory of Machine
The Hooke's joint consists of:

Four forks
Three forks
Two forks
One fork

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Theory of Machine
The frictional torque transmitted in a flat pivot bearing with assumption of uniform pressure is _________ as compared to uniform wear.

None of the listed here
Same
Less
More

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Theory of Machine
The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle)

cos (θ - φ) + 1/ sin (θ + φ) + 1
cos (θ + φ) + 1/ cos (θ - φ) + 1
cos (θ - φ) + 1/ cos (θ + φ) + 1
sin (θ + φ) + 1/ cos (θ - φ) + 1

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Theory of Machine
Coriolis component is encountered in

Slider crank mechanism
Four bar chain mechanism
Quick return mechanism of shaper
Both (A) and (C) above

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Theory of Machine
The dynamic friction is the friction experienced by a body, when the body

None of these
Is at rest
Is in motion
Just begins to slide over the surface of the other body

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Theory of Machine
A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to

I₂/G²
G².I₂
I₂/G
G.I₂

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