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Theory of Machine

Theory of Machine
The number of centers in a crank driven slider crank mechanism is

6
4
2

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Theory of Machine
The relation between number of links (l) and number of joints (j) in a kinematic chain is

l = (2/3).(j + 2)
l = (1/2).(j + 2)
l = (3/4).(j + 3)
l = j + 4

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Theory of Machine
In a locomotive, the resultant unbalanced force due to the two cylinders along the line of stroke, is known as

None of these
Tractive force
Swaying couple
Hammer blow

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Theory of Machine
One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where δ = Deflection of the spring)

1/2π. √(δ/g)
2π. √(g/δ)
1/2π. √(g/δ)
2π. √(δ/g)

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Theory of Machine
In a four stroke I.C. engine, the turning moment during the compression stroke is

Negative during major portion of the stroke
Positive throughout
Positive during major portion of the stroke
Negative throughout

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Theory of Machine
The ratio of maximum fluctuation of speed to the mean speed is called

Maximum fluctuation of speed
Fluctuation of speed
Coefficient of fluctuation of speed
None of these

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