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Theory of Machine

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

None of these
Maximum
Zero
Minimum

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

π/ω
ω × 2π
ω/2π
2π/ω

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Theory of Machine
The method of direct and reverse cranks is used in engines for

Balancing of forces and couples
The control of speed fluctuations
Kinematic analysis
Vibration analysis

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Theory of Machine
Flexible coupling is used because

It prevents shock transmission and eliminates stress reversals
It is easy to disassemble
It transmits shocks gradually
It is easy to engage and disengage

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

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

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Theory of Machine
Cylindrical cams can be classified as

Circular
Tangent
None of these
Reciprocating

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