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Theory of Machine

Theory of Machine
Carnot cycle is

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

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Theory of Machine
When the two elements of a pair have __________ when in motion, it is said to a lower pair.

None of these
Line or point contact
Body contact
Surface contact

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Theory of Machine
The Klein's diagram is used when

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

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Theory of Machine
In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called

Exhaust lap
Steam lap
Lead
None of these

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Theory of Machine
A reed type tachometer use the principle of

Longitudinal vibration
Torsional vibration
Transverse vibration
Damped free vibration

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Theory of Machine
A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of the rotor separately, are 100 Hz and 200 Hz respectively. The lowest critical speed is

6,000 r.p.m.
12,000 r.p.m.
5,367 r.p.m.
9,360 r.p.m.

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