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Theory of Machine

Theory of Machine
The secondary unbalanced force is maximum __________ in one revolution of the crank.

Two times
Sixteen times
Four times
Eight times

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Theory of Machine
Balancing of rotating and reciprocating parts of an engine is necessary when it runs at

Slow speed
Any one of these
Moderate speed
Highs peed

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Theory of Machine
The size of cam depends upon

Prime circle
Pitch circle
Pitch curve
Base circle

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Theory of Machine
A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

1.4 N-s/m
52.92 N-s/m
18.52 N-s/m
529.2 N-s/m

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Theory of Machine
In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is

270°
90°
180°
0°

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Theory of Machine
When the two elements of a pair have __________ when in motion, it is said to a lower pair.

Line or point contact
Body contact
Surface contact
None of these

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