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Theory of Machine

Theory of Machine
In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is

0°
270°
180°
90°

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Theory of Machine
In under damped vibrating system, if x₁ and x₂ are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to

log(x₁/x₂)
x₁/x₂
loge(x₁/x₂)
log(x₁.x₂)

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Theory of Machine
The purpose of a link is to

Guide other links
Transmit motion
Act as a support
All of these

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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 anticlockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

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

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Theory of Machine
Which of the following disciplines provides study of relative motion between the parts of a machine?

Applied mechanics
Mechanisms
Kinematics
Theory of machines

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Theory of Machine
The lead screw of a lathe with nut forms a

Screw pair
Sliding pair
Turning pair
Rolling pair

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