Multiple Choice Questions (MCQ) on friction
The force of friction is maximum when the surface
- Is on the point of motion
- Is at rest
- Is moving
- The friction remains same at all points
(Ans:a)
The types of threads used in Screw jacks are
- Metric thread
- Square
- ACME
- Buttress
(Ans:b)
For a single started thread, the lead is equal to
- p/2
- p
- 2p
- p/3
Where p = pitch
(Ans:b)
The slope of the thread with horizontal is known as
- helix
- lead
- pitch
- helix angle
(Ans:d)
The flat pivot bearing is used to bear
- axial thrust
- radial thrust
- both radial and axial thrust
- None of the above
(Ans:a)
In plate clutch, the clutch plate is placed
- Before flywheel
- After pressure plate
- In between pressure plate and flywheel
- None of the above
(Ans:c)
The clutch is placed in four-wheeler, in between
- Engine and gear box
- Gear box and differential
- Propeller shaft and differential
- None of the above
(Ans:a)
The radius of friction circle is independent of
- Weight of the shaft
- Radius of the shaft
- Coefficient of friction
- All of the above
(Ans:a)
In rotation of shaft, the power lost in friction is given by
- W x µ x V Watts
- W x µ x V Kilo-watts
- W x µ / V Watts
- W x µ / V Kilo-watts
Where, W=Weight of shaft, µ=Coefficient of friction, V= Velocity of shaft (in m/s)
(Ans:a)
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