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Theory of Machine

Theory of Machine
The locus of a point on a thread unwound from a cylinder will be

Cycloidal
A circle
A straight line
Involute

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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.

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

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Theory of Machine
With single Hooke's joint it is possible to connect two shafts, the axes of which have an angular misalignment up to

20°
30°
40°
10°

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Theory of Machine
In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)

(r₁ + r₂) (x/y)
(r₁ + r₂) (y/x)
(r₁ - r₂) (y/x)
(r₁ - r₂) (x/y)

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Theory of Machine
The natural frequency of free transverse vibrations due to a point load acting over a simply supported shaft is equal to (where δ = Static deflection of a simply supported shaft due to the point load)

0.571/√δ
0.6253/√δ
0.5615/√δ
0.4985/√δ

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Theory of Machine
When a point at the end of a link moves with constant angular velocity, its acceleration will have

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

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