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Theory of Machine

Theory of Machine
A pantograph is a mechanism with

Rolling pairs
Higher pairs
Lower pairs
Turning pairs

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Theory of Machine
In full depth involute system, the smallest number of teeth in a pinion which meshes with rack without interference is

12
25
16
32

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Theory of Machine
When the particles of a body moves perpendicular to its axis, then the body is said to have

None of these
Transverse vibration
Longitudinal vibration
Torsional vibration

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Theory of Machine
Which type of gear train is used in clock mechanism to join hour hand and minute hand?

Reverted gear train
Compound gear train
Simple gear train
Epicyclic gear train

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Theory of Machine
If ‘D₁’ and ‘D₂’ be the diameters of driver and driven pulleys, then belt speed is proportional to

D₂/D₁
D₁
D₁/D₂
D₁.D₂

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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

8 fn
4 fn
2 fn
fn/2

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