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Theory of Machine

Theory of Machine
Rectilinear motion of piston is converted into rotary by

Cross head
Slider crank
Gudgeon pin
Connecting rod

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Theory of Machine
In considering friction of a V-thread, the virtual coefficient of friction (μ₁) is given by

μ₁ = μ cos β
μ₁ = μ sin β
μ₁ = μ/cos β
μ₁ = μ/sin β

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Theory of Machine
The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft, and I = Mass moment of inertia of the disc attached at the end of a shaft)

1/2π
2π qI
(1/2π). √(q/I)
2π. √(q/I)

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Theory of Machine
The frictional torque transmitted in a conical pivot bearing with assumption of uniform pressure is __________ as compared to uniform wear.

Less
None of these
Same
More

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Theory of Machine
The unbalanced primary forces in a reciprocating engine are

Not balanced
Balanced partially
Balanced by secondary forces
Balanced completely

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Theory of Machine
In Meyer's expansion valve, the expansion valve is driven by an eccentric having an angle of advance from

80°- 90°
60°-70°
50°- 60°
70°- 80°

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