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Theory of Machine

Theory of Machine
A cam with a roller follower would constitute following type of pair

Close pair
Higher pair
Lower pair
Open pair

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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.

None of these
Equal to
Greater than
Less than

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Theory of Machine
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)

[(r + R) sinφ]/2
[(r² + R²) cosφ]/2
[(r + R) cosφ]/2
[(r² + R²) sinφ]/2

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Theory of Machine
The lead screw of a lathe with nut forms a

Rolling pair
Sliding pair
Screw pair
Turning pair

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Theory of Machine
The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a turn to the left. The effect of gyroscopic couple on the aeroplane will be

To dip the nose and tail
To raise the nose and tail
To dip the nose and raise the tail
To raise the nose and dip the tail

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Theory of Machine
If ω/ωn = 2, where co is the frequency of excitation and ωn is the natural frequency of vibrations, then the transmissibility of vibration will the

2
1
0.5
1.5

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