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Theory of Machine

Theory of Machine
The periodic time is given by (where ω = Angular velocity of the particle in rad/s)

2π/ω
ω × 2π
π/ω
ω/2π

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Theory of Machine
The behaviour of gases can be fully determined by

3 laws
2 laws
4 laws
1 law

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Theory of Machine
The advantage of the piston valve over the slide valve is that in the former case

Both wear and power absorbed are low
The pressure developed being high provides tight sealing
Power absorbed is less
Wear is less

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Theory of Machine
In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

0.6
0.4
0.8
0.2

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Theory of Machine
The mechanism in which two are turning pairs and two are sliding pairs, is called a

Elliptical trammel
Scotch yoke mechanism
Double slider crank chain
All of these

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Theory of Machine
For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that

Governor B is more sensitive than governor A
Both governors A and B are equally sensitive
None of these
Governor A is more sensitive than governor B

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