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Theory of Machine

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

Gyroscope
Valve and valve gears
Pantograph
All of these

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Theory of Machine
Klein's construction gives a graphic construction for

Acceleration polygon
Velocity polygon
Four bar chain mechanism
Slider-crank mechanism

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Theory of Machine
The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.

Equal to
Greater than
Less than
None of these

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Theory of Machine
Kinematic pairs are those which have two elements that

Permit relative motion
Have line contact
Have surface contact
Are held together

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Theory of Machine
A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

18.52 N-s/m
529.2 N-s/m
52.92 N-s/m
1.4 N-s/m

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Theory of Machine
The periodic time is given by (where ω = Angular velocity of the particle in rad/s)

ω × 2π
π/ω
2π/ω
ω/2π

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