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Theory of Machine

Theory of Machine
The critical speed of a shaft depends upon its

Mass
Stiffness and eccentricity
Mass and stiffness
Stiffness

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Theory of Machine
The velocity of the belt for maximum power is (where m = Mass of the belt in kg per meter length)

√(3m/T)
(T.g)/3
√(T/3m)
T/3

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Theory of Machine
The maximum or minimum value of the swaying couple is

± (a/√2) (1 - c) m.ω².r
± a (1 - c) m.ω².r
± 2a (1 - c) m.ω².r
± c.m.ω².r

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Theory of Machine
In a reciprocating engine, usually __________ of the reciprocating masses are balanced.

Whole
Two-third
Three-fourth
One-half

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Theory of Machine
The height of a Watt's governor (in meters) is equal to (where N = Speed of the arm and ball about the spindle axis)

8.95/N²
8950/N²
89.5/N²
895/N²

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Theory of Machine
A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

52.92 N-s/m
18.52 N-s/m
529.2 N-s/m
1.4 N-s/m

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