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Theory of Machine

Theory of Machine
Which of the following mechanism is obtained from lower pair?

Gyroscope
All of these
Valve and valve gears
Pantograph

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Theory of Machine
At the nodal point in a shaft, the amplitude for torsional vibration will be

Zero
Minimum
Maximum
Infinity

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Theory of Machine
The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body, and δ = Static deflection of the body)

0.4985/√δ
1/2π × √(s/m)
1/2π × √(g/δ)
Any one of the listed here

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Theory of Machine
In a system subjected to damped forced vibrations, the ratio of maximum displacement to the static deflection is known as

Damping factor
Magnification factor
Critical damping ratio
Logarithmic decrement

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Theory of Machine
When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.

Smaller
Smaller OR Larger
Larger
None of the listed here

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Theory of Machine
Which of the following mechanisms produces mathematically an exact straight line motion?

Watt mechanism
Tchebicheff mechanism
Peaucellier's mechanism
Grasshopper mechanism

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