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Theory of Machine

Theory of Machine
The velocity of a body moving with simple harmonic motion is __________ at the mean position.

None of these
Maximum
Minimum
Zero

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Theory of Machine
When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be

Unstable
Isochronous
Stable
Hunt

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Theory of Machine
A flywheel is fitted to the crankshaft of an engine having W as the amount of indicated work per revolution and permissible limits of coefficient of fluctuation of energy and speed as CE and CS respectively. The kinetic energy of the flywheel is given by

W CE / CS
W CE / 2CS
2 W CE / CS
W CS / 2CE

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Theory of Machine
The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball, and M = Mass on the sleeve)

c (m + M) g
c/(m + M) g
c (m - M) g
c/(m - M) g

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Theory of Machine
In order to facilitate starting of locomotive in any position, the cranks of a locomotive with two cylinders, are placed at

180° to each other
120° to each other
90° to each other
45° to each other

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Theory of Machine
The magnitude of linear velocity of a point B on a link AB relative to point A is, (Where ω = Angular velocity of the link AB)

ω × (AB)²
ω² × AB
(ω × AB)²
ω × AB

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