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Theory of Machine

Theory of Machine
V-belts are usually used for

None of these
Long and short drives
Long drives
Short drives

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Theory of Machine
The velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by (where ω = Angular velocity of the cam shaft)

ω (r₁ + r₂) sinθ sec2θ
ω (r₁ r₂) sinθ
ω (r₁ + r₂) cosθ cosec2θ
ω (r₁ r₂) cosθ

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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.

Same
Less
None of these
More

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Theory of Machine
A machine mounted on a single coil spring has a period of free vibration of tp . If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will become

16 tp
4 tp
tp /4
tp /16

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Theory of Machine
In a disc clutch, if there are n₁ number of discs on the driving shaft and n₂ number of discs on the driven shaft, then the number of pairs of contact surfaces will be

n₁ + n₂ + 1
n₁ + n₂ - 2
n₁ + n₂
n₁ + n₂ - 1

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Theory of Machine
The ratio of the maximum displacement of the forced vibration to the deflection due to the static force, is known as

Magnification factor
Damping factor
Logarithmic decrement
Damping coefficient

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