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Theory of Machine

Theory of Machine
In order to double the period of a simple pendulum, the length of the string should be

None of these
Quadrupled
Doubled
Halved

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Theory of Machine
In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

0.6
0.2
0.4
0.8

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Theory of Machine
The frictional torque transmitted in a conical pivot bearing, considering uniform wear, is

(2/3) μ W R cosecα
(1/2) μ W R cosecα
μ W R cosecα
(3/4) μ W R cosecα

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Theory of Machine
A mechanism consisting of four links is called a __________ mechanism.

None of these
Compound
Simple
Binary

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Theory of Machine
A pantograph is a mechanism with

Turning pairs
Lower pairs
Higher pairs
Rolling pairs

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Theory of Machine
V-belts are usually used for

Long drives
Long and short drives
Short drives
None of these

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