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Theory of Machine

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

Bevel gear
Helical gear
Spur gear
Spiral gear

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Theory of Machine
In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the transmissibility will be (where ω = Angular speed of the system, ωn = Natural frequency of vibration of the system)

Greater than unity
Zero
Equal to unity
Less than unity

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Theory of Machine
In a screw jack, the effort required to lower the load W is given by

P = W tan(α + φ)
P = W tan(φ - α)
P = W tan(α - φ)
P = W cos(α + φ)

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

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

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Theory of Machine
Sense of tangential acceleration of a link

Is opposite to that of velocity
Is perpendicular to that of velocity
Could be either same or opposite to velocity
Is same as that of velocity

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Theory of Machine
The sensitiveness of the governor _____ as the speed range decreases.

Decreases
Increases
None of the listed here
Remains unaffected

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