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Theory of Machine

Theory of Machine
The number of links in pantograph mechanism is equal to

4
5
2
3

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Theory of Machine
In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is

There is no such relationship
Greater than sum of other two
Equal to sum of other two
Less than sum of other two

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Theory of Machine
Transmission of power from the engine to the rear axle of an automobile is by means of

Compound gears
Worm and wheel method
Hooke's joint
Crown gear

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Theory of Machine
The lower pair is a

Sliding pair
Point contact pair
Closed pair
Open pair

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Theory of Machine
In locomotives, the ratio of the connecting rod length to me crank radius is kept very large in order to

Have perfect balancing
Minimize the effect of primary forces
Minimize the effect of secondary forces
To start the locomotive quickly

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Theory of Machine
The velocity of the belt for maximum power is (where m = Mass of the belt in kg per meter length)

(T.g)/3
T/3
√(3m/T)
√(T/3m)

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