Friction-Increasing and Reducing Friction (CBSE (Central Board of Secondary Education- Board Exam) Class-8 Science): Questions 1 - 8 of 8

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Question number: 1

» Friction » Increasing and Reducing Friction » Fluid Friction

MCQ▾

Question

Fluid friction is also called as:

Choices

Choice (4) Response

a.

Viscous drag

b.

Drag

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

Question number: 2

» Friction » Increasing and Reducing Friction » Sliding Friction

MCQ▾

Question

The friction which comes into play when a body slides over another body is:

Choices

Choice (4) Response

a.

Sliding friction

b.

Drag

c.

Rolling Friction

d.

Treading

Question number: 3

» Friction » Increasing and Reducing Friction » Ball Bearing

MCQ▾

Question

Ball bearings are type of:

Choices

Choice (4) Response

a.

Rollers

b.

Axle

c.

Wheels

d.

Treading

Question number: 4

» Friction » Increasing and Reducing Friction » Fluid Friction

MCQ▾

Question

Gases and liquids are called:

Choices

Choice (4) Response

a.

Fluids

b.

Viscous drag

c.

Drag

d.

All of the above

Question number: 5

» Friction » Increasing and Reducing Friction » Rolling Friction

MCQ▾

Question

Rolling friction:

Choices

Choice (4) Response

a.

Increases the friction

b.

Lesser than sliding friction

c.

Has no effect

d.

Reduces the friction

Question number: 6

» Friction » Increasing and Reducing Friction » Lubricants

MCQ▾

Question

Lubrication is a process of:

Choices

Choice (4) Response

a.

Fluid friction

b.

Converting dry friction into wet friction

c.

Use of lubricants for reducing friction

d.

Both b. and c. are correct

Question number: 7

» Friction » Increasing and Reducing Friction » Fluid Friction

MCQ▾

Question

To overcome drag objects moving through fluid are given special shapes is called as

Choices

Choice (4) Response

a.

Lubrication

b.

Ball bearing

c.

Treading

d.

Streamlining of the object

Question number: 8

» Friction » Increasing and Reducing Friction » Wheels Reduce Friction

MCQ▾

Question

Trading of tyre is done:

Choices

Choice (4) Response

a.

Has no effect on friction

b.

To Increase the friction

c.

To Decrease the friction

d.

Question does not provide sufficient data or is vague

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