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Theory of Machine

Theory of Machine
A ball and a socket forms a

Screw pair
Spherical pair
Rolling pair
Turning pair

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Theory of Machine
In a pantograph, all the pairs are

Self-closed pairs
Turning pairs
Spherical pairs
Sliding pairs

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Theory of Machine
An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be

700°K
650°K
625°K
600°K

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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)
loge(x₁/x₂)
log(x₁.x₂)
x₁/x₂

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Theory of Machine
The working depth of a gear is the radial distance from the

Pitch circle to the bottom of a tooth
Addendum circle to the clearance circle
Top of a tooth to the bottom of a tooth
Pitch circle to the top of a tooth

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

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MORE MCQ ON Theory of Machine

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