Question 1

Which of the following options is not a lubricant?

Oil
Grease
Graphite
Black Polish

Answer

Correct Option: D

Question 2

What would happen to automobiles if there would be no friction between tyres and road?

The automobiles will start only.
The automobiles will stop only.
The automobiles will not start or stop or turn.
The automobiles will run faster.

Answer

Correct Option: C

Question 3

Why is the sole of shoe groomed?

To increase friction
To decrease friction
To reduce friction
To increase pressure

Answer

Correct Option: A

Question 4

Why do palms become hot after rubbing them?

Force
Friction
Pressure
Environmental heat

Answer

Correct Option: B

Question 5

Why does friction decrease efficiency of machines?

Consumption of heat due to used force.
Generation of heat due to pressure.
Consumption of heat due to friction.
Generation of heat due to friction.

Answer

Correct Option: D

Question 6

What is rolling friction?

When a body slides on the surface of another body.
When a body rolls over the surface of another body.
When a body is kept stationary on another body.
When a body is accelerating on the surface of another body.

Answer

Correct Option: B

Question 7

Which of the following activities requires force of friction?

Rolling
Writing
Walking
All of the above

Answer

Correct Option: D

Question 8

Which of the following processes is not done to increase the friction?

Treading of tyres
Growing of sole of shoes
Throwing sand on tracks
Oiling

Answer

Correct Option: D

Question 9

It is easier to pull luggage fitted with rollers because

rolling friction is greater.
sliding friction is more.
rolling friction is less.
sliding friction is less.

Answer

Correct Option: C

Question 10

How can we increase the force of friction?

By polishing
By greasing
By oiling
By throwing sand on tracks covered with snow

Answer

Correct Option: D

Question 11

Which of the following frictions applies least resistance to the motion of the body?

Rolling friction
Sliding friction
Static friction
None of these

Answer

Correct Option: A

Question 12

Wheel is said to be one of the greatest inventions for man kind because it can

increase friction
reduce friction
eliminate friction
generate energy

Answer

Correct Option: B

Question 13

How can friction be reduced to zero?

By using oil
By using polishing
By using grease
Never possible

Answer

Correct Option: D

Question 14

What is the use of ball bearings between hubs and the axle of ceiling fans and bicycle?

To reduce sliding friction
To reduce static friction
Rolling reduces friction
Rolling increases friction

Answer

Correct Option: C

Question 15

Drag is a frictional force exerted by _____.

gases
solids
liquids
both gases and liquids

Answer

Correct Option: D

Question 16

Which of the following types of shapes is given to the objects to minimize drag?

Triangular
Spherical
Streamlined
Rectangular

Answer

Correct Option: C

Question 17

Objects loose energy when they move through fluids to over come

Static friction
Sliding friction
Rolling friction
Fluid friction

Answer

Correct Option: D

Question 18

Why is the shape of birds streamlined?

To minimize force of friction
To increase force of friction
To overcome gravitational force
To protect themselves from the ill effects of sunlight

Answer

Correct Option: A

Question 19

Which of the following objects does not use rolling friction?

Bicycle
Scooter
Car
A rock on a hill

Answer

Correct Option: D

Question 20

Which type of force is exerted by the water when a ship moves through it?

Frictional force
Gravitational force
Magnetic force
Molecular force

Answer

Correct Option: A

Question 21

Why can friction never be entirely eliminated?

No surface is perfectly rough.
No surface is perfectly smooth.
Surfaces can never be polished.
Because dust particles present in air always make surface rough.

Answer

Correct Option: B

Question 22

Why do we sprinkle fine powder on carom?

To increase friction.
To decrease the force used for striking.
To decrease friction.
To prevent the wood of carom board.

Answer

Correct Option: C

Question 23

On which of the following factors fluid friction does not depend?

Speed of body
Shape of object
Nature of fluid
Nature of object

Answer

Correct Option: D

Question 24

From which of the following did the scientists get hints for streaming the objects?

Animals
Plants
Birds
Rodents

Answer

Correct Option: C

Question 25

Air exerts frictional force on an object moving through it because air ____.

moves in the direction of the body
opposes motion of the body
air increases the speed of body and its speed exerts frictional force
air is very light and thin, so, it exerts frictional force

Answer

Correct Option: B

Description: Friction (II)
Number of Questions: 25
Created by: Amit Pandey
Tags: Friction (II) Factors Affecting Friction Friction Force and Friction Decreasing Friction by Using Lubricants How to Decrease Friction Wearing Effects of Friction Understanding Fluid Friction Organic Chemistry Some Important Polymers

Friction - II

Find more quizzes from top tags