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Theory of Machine

Theory of Machine
The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.

Product
Ratio
Difference
Sum

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Theory of Machine
A simple spring-mass vibrating system has a natural frequency of fn. If the spring stiffness is halved and the mass is doubled, then the natural frequency will become

fn/2
2 fn
4 fn
8 fn

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Theory of Machine
The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be

0, and less than coV
cor, 0
0, 0
0, and more than co2r

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Theory of Machine
Which of the following is an inversion of Single slider crank chain?

Elliptical trammel
Rotary engine
Beam engine
Oldham’s coupling

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Theory of Machine
When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.

Smaller OR Larger
Smaller
None of the listed here
Larger

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Theory of Machine
In order to balance the reciprocating masses,

None of these
Both (A) and (B)
Primary forces and couples must be balanced
Secondary forces and couples must be balanced

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