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Theory of Machine

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

Slider crank
Cross head
Gudgeon pin
Connecting rod

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Theory of Machine
The type of gears used to connect two non parallel and non intersecting shafts is

Bevel gear
Spiral gear
Spur gear
Helical gear

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Theory of Machine
In under damped vibrating system, if x₁ and x₂ are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to

log(x₁.x₂)
loge(x₁/x₂)
x₁/x₂
log(x₁/x₂)

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Theory of Machine
The factor which affects the critical speed of a shaft is

Span of shaft
Diameter of disc
Eccentricity
All of the listed here

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Theory of Machine
Which of the following governor is used to drive a gramophone?

Hartnell governor
Pickering governor
Porter governor
Watt governor

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Theory of Machine
The equation of motion for a single degree of freedom system with viscous damping is 4(dx²/dt²) + 9(dx/dt) + 16x. The damping ratio of the system is

9/128
30195
44082
44090

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