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Theory of Machine

Theory of Machine
In S.H.M., acceleration is proportional to

Rate of change of velocity
Displacement
All of these
Velocity

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

More
Less
None of these
Same

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Theory of Machine
The swaying couple is due to the

Primary unbalanced force
Partial balancing
Two cylinders of locomotive
Secondary unbalanced force

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Theory of Machine
The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

(ω₁ - ω₂)2r
ω₁.ω₂.r
(ω₁ - ω₂)r
(ω₁ + ω₂)r

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Theory of Machine
For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that

Both governors A and B are equally sensitive
Governor B is more sensitive than governor A
None of these
Governor A is more sensitive than governor B

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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
I₂/G
G.I₂
G².I₂

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