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Theory of Machine

Theory of Machine
A slider moves at a velocity v on a link revolving at ω rad/s. The coriolis component of acceleration is

ωv
ω²v
2ωv²
2ωv

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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.r
(ω₁ - ω₂)r
(ω₁ - ω₂)2r
(ω₁ + ω₂)r

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Theory of Machine
The primary unbalanced force is maximum _________ in one revolution of the crank.

Twice
Sixteen times
Eight times
Four times

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Theory of Machine
In a Hartnell governor, the stiffness of the spring is given by (where S1 and S2 = Spring forces exerted on the sleeve at max. and min. radii of rotation, and h = Compression of the spring)

(S₁ + S₂) / h
(S₁ + S₂) / 2h
(S₁ - S₂) / h
(S₁ - S₂) / 2h

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Theory of Machine
In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the transmissibility will be (where ω = Angular speed of the system, ωn = Natural frequency of vibration of the system)

Less than unity
Equal to unity
Zero
Greater than unity

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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

ANSWER DOWNLOAD EXAMIANS APP
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