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Theory of Machine

Theory of Machine
The minimum force required to slide a body of weight W on a rough horizontal plane is

W sinθ
W cosecθ
W cosθ
W tanθ

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Theory of Machine
The power transmitted by a belt is maximum when the maximum tension in the belt is _________ of centrifugal tension.

One-third
Double
Three times
Two-third

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Theory of Machine
When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be

To raise the stern and lower the bow
To move the ship towards starboard
To raise the bow and lower the stern
To move the ship towards port side

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Theory of Machine
The balancing of a rigid rotor can be achieved by appropriately placing balancing masses in

Four planes
Two planes
A single plane
Three planes

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Theory of Machine
The Grubler's criterion for determining the degrees of freedom (n) of a mechanism having plane motion is (where l = Number of links, and j = Number of binary joints)

n = 2(l - 1) - 2j
n = 4(l - 1) - 3j
n = (l -1) - j
n = 3(l - 1) - 2j

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Theory of Machine
When a point moves along a straight line, its acceleration will have

Tangential component only
Coriolis component only
Radial and tangential components both
Radial component only

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