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Theory of Machine

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

Valve and valve gears
Gyroscope
Pantograph
All of these

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Theory of Machine
The Coriolis component of acceleration depends upon

Both (A) and (B)
None of these
Angular velocity of the link
Velocity of slider

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Theory of Machine
The two elements of a pair are said to form a higher pair, when they

Permit relative motion
Are kept in contact by the action of external forces, when in motion
Have a surface contact when in motion
Have a line or point contact when in motion

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Theory of Machine
The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by (where OQ = Distance between the centre of circular flank and centre of nose)

ω² × OQ tanθ
ω² × OQ cosθ
ω² × OQ sinθ
ω² × OQ

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Theory of Machine
If ω/ωn is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

360°
90°
0°
180°

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Theory of Machine
To transmit power from one rotating shaft to another whose axes are neither parallel nor intersecting, use?

Spiral gear
Worm gear
Bevel gear
Spur gear

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