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Theory of Machine

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

None of these
Binary
Compound
Simple

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Theory of Machine
When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in _________ directions.

Opposite
Perpendicular
Same
None of these

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Theory of Machine
The type of gears used to connect two non parallel and non intersecting shafts is

Helical gear
Bevel gear
Spur gear
Spiral gear

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Theory of Machine
The working depth of a gear is the radial distance from the

Pitch circle to the bottom of a tooth
Pitch circle to the top of a tooth
Addendum circle to the clearance circle
Top of a tooth to the bottom of a tooth

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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
4 fn
8 fn
2 fn

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Theory of Machine
The equivalent length of a simple pendulum which gives the same frequency as a compound pendulum is

h/(kG² + h²)
(kG² + h²)/h
(kG² + h²)/h²
h²/(kG² + h²)

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