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Theory of Machine

Theory of Machine
Carnot cycle is

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

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Theory of Machine
In an ideal machine, the output as compared to input is

More
Equal
May be less or more depending on efficiency
Less

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Theory of Machine
The following is the inversion of slider crank chain mechanism

All of these
Hand pump
Whitworth quick return mechanism
Oscillating cylinder engine

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Theory of Machine
Efficiency of a screw jack is given by

tanα/tan (α +φ)
tan (α - φ)/tanα
tan (α + φ)/tanα
tanα/tan (α - φ)

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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/(n - 1)
ω²r. (n - 1)/n
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)

I ω ωP
(1/2). I ω ωP
Iω²
(1/2).Iω²

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