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Free download in PDF Friction Multiple Choice Questions(mcqs) & Answers for competitive exams. These Friction Objective Questions with Answers are important for Board Exams as well as competitive exams like IIT-JEE, AIIMS, NEET and other Pre-Medical and Engineering Exams. These short solved questions or quizzes are provided by Gkseries.
(1)
Which of the following statements is true for flat belts?
[A]
They are used for short distances between the pulleys
[B]
They have high efficiency
[C]
They are used in lathe machines
[D]
All of the above
Answer: They are used in lathe machines
(2)
Which formula is used to calculate angle of static friction (Φs)?
[A]
tan-1 μs
[B]
sin-1 μs
[C]
cos-1 μs
[D]
none of the above
(3)
Which of the following surfaces will offer the least friction?
[A]
Vinyl floor
[B]
Plywood
[C]
Plastic
[D]
Ice
(4)
Tyres of which vehicles are biggest treads among the following?
[A]
Race car
[B]
Car
[C]
Motorbike
[D]
Excavator
(5)
The radius of friction circle is independent of
[A]
Weight of the shaft
[B]
Radius of the shaft
[C]
Coefficient of friction
[D]
All of the above
Answer: Weight of the shaft
(6)
The flat pivot bearing is used to bear
[A]
Axial Thrust
[B]
Radial Thrust
[C]
Both Radial And Axial Thrust
[D]
None Of The Above
(7)
In plate clutch, the clutch plate is placed
[A]
Before flywheel
[B]
After pressure plate
[C]
In between pressure plate and flywheel
[D]
None of the above
Answer: In between pressure plate and flywheel
(8)
For a single started thread, the lead is equal to
[A]
p/2
[B]
p
[C]
2p
[D]
p/3
(9)
When the two surfaces in contact have a very thin layer of lubricant in between them, it is known as
[A]
Solid friction
[B]
Rolling friction
[C]
Greasy friction
[D]
Film friction
(10)
The coefficient of friction (µ) is equal to
[A]
TanΦ
[B]
SinΦ
[C]
CotΦ
[D]
All above
(11)
The body will move only when
[A]
Force of friction = applied force
[B]
Force of friction < applied force
[C]
Force of friction > applied force
[D]
All of the above
Answer: Force of friction < applied force
(12)
A train has to negotiate a curve of radius 400m. By how much should the putter rail be raised with respect to inner rail for speed of 48 km/h? The distance between the rails is 1m.
[A]
0.20m
[B]
0.0454m
[C]
0.45m
[D]
0.020m
(13)
The force of friction depends upon
[A]
Nature of surface of contact
[B]
Material of objects in contact
[C]
Both ‘a’ and ‘b’
[D]
None of the above
(14)
When moving along a curved path, he
[A]
Leans inwards
[B]
Leans outwards
[C]
Is still
[D]
Leans sideways
(15)
Friction can be increased by
[A]
Using air cushion
[B]
Lubricants
[C]
Using sand
[D]
Using ball bearings
(16)
A scooter weighs 120kg f. Brakes are applied so that wheels stop rolling and start skidding. Find the force of friction if the coefficient of friction is 0.4.
[A]
60kg f
[B]
48kg f
[C]
25kg f
[D]
32kg f
(17)
A cubical block rests on an inclined plane of μ = 1/√3, determine the angle of inclination when the block just slides down the inclined plane
[A]
40°
[B]
50°
[C]
30°
[D]
20°
(18)
The shape of the airplane is like a
[A]
Bird
[B]
Car
[C]
Dog
[D]
All Of The Above
(19)
Friction is a /an_______
[A]
Evil
[B]
Foe
[C]
Both (a) and (b)
[D]
None
(20)
Fluid are____
[A]
Gases
[B]
Liquids
[C]
Gases and liquids both
[D]
None of these
Answer: Gases and liquids both
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