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Theory of Machine

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

90°
180°
360°
0°

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Theory of Machine
The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

ω₁.ω₂.r
(ω₁ - ω₂)r
(ω₁ + ω₂)r
(ω₁ - ω₂)2r

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Theory of Machine
A fixed gear having 200 teeth is in mesh with another gear having 50 teeth. The two gears are connected by an arm. The number of turns made by the smaller gear for one revolution of arm about the centre of bigger gear is

4
3
2
5

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Theory of Machine
When brakes are applied to all the four wheels of a moving car, the distance traveled by the car before it is brought to rest, will be

Maximum
Zero
None of these
Minimum

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Theory of Machine
The frictional torque transmitted by a cone clutch is same as that of

Flat pivot bearing
Conical pivot bearing
Flat collar bearing
Truncated conical pivot bearing

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Theory of Machine
Whitworth quick return mechanism is obtained by inversion of

Five link mechanism
Kinematic chain
Roller cam mechanism
Slider crank mechanism

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