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Theory of Machine

Theory of Machine
The periodic time of one oscillation for a simple pendulum is

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

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Theory of Machine
To obviate axial thrust, following gear drive is used

Mutter gears
Double helical gears having opposite teeth
Double helical gears having identical teeth
Single helical gear in which one of the teeth of helix angle a is more

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Theory of Machine
In a shaper mechanism, the Coriolis component of acceleration will

Depend on position of crank
Not exist
None of these
Exist

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Theory of Machine
When the crank is at the inner dead center, in a reciprocating steam engine, then the acceleration of the piston will be

ω²r. (n + 1)/n
ω²r. (n - 1)/n
ω²r. n/(n - 1)
ω²r. n/(n + 1)

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Theory of Machine
A disc is a spinning with an angular velocity ω rad/s about the axis of spin. The couple applied to the disc causing precession will be (where I = Mass moment of inertia of the disc, and ωP = Angular velocity of precession of the axis of spin)

(1/2).Iω²
(1/2). I ω ωP
Iω²
I ω ωP

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Theory of Machine
The Klein's diagram is used when

Crank has nonuniform angular velocity
Crank has uniform angular acceleration
Crank has uniform angular velocity
Crank has nonuniform angular acceleration

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