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Theory of Machine

Theory of Machine
The primary unbalanced force is maximum _________ in one revolution of the crank.

Four times
Twice
Eight times
Sixteen times

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Theory of Machine
A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when

a is +ve and b is also +ve
a = 0 and b is +ve
a is +ve and b = 0
a is +ve and b is -ve

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Theory of Machine
The velocity of a particle moving with simple harmonic motion, at any instant is given by (where ω = Displacement of the particle from mean position)

ω √(x² - r²)
ω √(r² - x²)
ω² √(x² - r²)
ω² √(r² - x²)

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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

625°K
700°K
600°K
650°K

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Theory of Machine
A circle passing through the pitch point with its center at the center of cam axis is known as

Outer circle
Prime circle
Base circle
Pitch circle

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Theory of Machine
The minimum periodic time of a compound pendulum is

2π. √(2kG/g)
2π. √(kG/g)
(1/2π). √(2kG/g)
(1/2π). √(kG/g)

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