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Theory of Machine

Theory of Machine
Carnot cycle is

a reversible cycle
a quasi static cycle
an irreversible cycle
a semi-reversible cycle

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Theory of Machine
The pitching of a ship produces forces on the bearings which act __________ to the motion of the ship.

Vertically and parallel
Horizontally and perpendicular
Vertically and perpendicular
Horizontally and parallel

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Theory of Machine
Which of the following is an open pair?

Ball and socket joint
Cam and follower
Lead screw and nut
Journal bearing

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Theory of Machine
The acceleration of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

ω² r₁ sinθ
ω² R cosθ
ω² (R - r₁) cosθ
ω² (R - r₁) sinθ

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Theory of Machine
The essential condition of placing the two masses, so that the system becomes dynamically equivalent, is (where l₁ and l₂ = Distance of two masses from the centre of gravity of the body, and kG = Radius of gyration of the body)

l₁l₂ = kG²
l₁ = kG
l₂ = kG
l₁l₂ = kG

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Theory of Machine
Whitworth quick return mechanism is obtained by inversion of

Roller cam mechanism
Slider crank mechanism
Kinematic chain
Five link mechanism

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