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Theory of Machine

Theory of Machine
In Meyer's expansion valve, the main valve is driven by an eccentric having an angle of advance from

10°-15°
15°-25°
30°-40°
25°-30°

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Theory of Machine
When a point moves along a straight line, its acceleration will have

Radial component only
Radial and tangential components both
Coriolis component only
Tangential component only

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Theory of Machine
In a turning moment diagram, the variations of energy above and below the mean resisting torque line is called

Fluctuation of energy
Maximum fluctuation of energy
None of the listed here
Coefficient of fluctuation of energy

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

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Theory of Machine
The balancing weights are introduced in planes parallel to the plane of rotation of the disturbing mass. To obtain complete dynamic balance, the minimum number of balancing weights to be introduced in different planes is

4
1
2
3

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Theory of Machine
In involute gears, the pressure angle is

Dependent on the size of teeth
Always constant
Dependent on the size of gears
Always variable

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