MCQ'S PHYSICS CLASS 8 Chapter FRICTION

Friction

 1.which one of the following is not a lubricant? 

(a) oil

(b) graphite

(c) grease

(d) water

2.The frictional force on an object in a fluid depends on its 

(a) speed

(b) volume

(C) mass

(D) weight

3.lubricants are the substance which 

(a) increase friction

(b) decrease friction

(C) Natural

(D) none of the above

4.friction is a type of a 

(a) contact force

(b) magnetic force

(C) non contact force

(D) gravitational force

5.The force of the friction in smooth surface is

(a) greater

(b) lesser

(c) higher

(d) none of the above

6.when coal burns in air_is formed

(a) carbon dioxide

(b) sulphur dioxide

(c) hydrogen gas

(d) carbon monoxide

7.which one of the following is obtained form coal tar? 

(a) petrol

(b) coke

(c) air

(d) napthalene balls

8.which one of the following is not a fossil fuel

(a) coal

(b) petrol

(c) wood

(d) diesel

9._is a natural resources

(a) car

(b) bus

(c) water

(d) parks

10.which one is least polluting fuel? 

(a) petrol

(b) diesel

(c) CNG

(d) kerosene

Bits Prepared By My Student

Misba

Class 8

VIDYODAYA ENGLISH MEDIUM HIGH SCHOOL.

1.pull or push is called as

(a) friction

(b) force

(c) muscular force

(d) none of these

2.which one of the following is contact force

(a) magnetic force

(b) gravitational force

(c) normal force

(d) electrostatic force

3.friction produces

(a) temperature

(b) coldness

(c) heat

(d) all the above

4.nylon is a 

(a) synthetic fibre

(b) artificial fibre 

(c) fibre

(d) all the above 

5.the property of drawing a material to make fine wires is called 

(a) malleability

(b) ductility

(c) sonority 

(d) none of these 

6.S.I unit of temperature 

(a) joule 

(b) j/kg 

(c) calorie

(d) kelvin

7.C.G.S unit of heat 

(a) cal/g

(b) calorie

(c) gram

(d) all the above 

8.the number of vibrations per second is called 

(a) pitch 

(b) amplitude 

(c) vibration

(d) frequency 

9.the main constituent of coal is 

(a) carbon

(b) oxygen 

(c) air

(d) water

10.which one of the following is less polluting fuel

(a) natural gas 

(b) coal

(c) kerosene 

(d) petrol

BitsPrepared By My Student

Lohitha

Class 8

VIDYODAYA ENGLISH MEDIUM HIGH SCHOOL.

1._is called black gold

(a) Coal

(b) Diesel

(c) petroleum

(d) natural gas

2._was used in manufacture of steel

(a)coke

(b)coal

(c)fuel

(d) coal tar

3.coal was the most important fuel in the _ century

(a)15th century

(b)16th century

(c)18th century

(d)19th century

4.CNG means

(a) compressed natural gas

(b) compact natural gas

(C) chemical natural gas

(d) common natural gas

5._is a natural resource

(a) water

(b)air

(c) plastic

(d) Carbon

6.The main constituent of coal is

(a) petrol

(b) oxygen

(c) carbon

(d)coal

7._gas causes climate change and global warming

(a) oxygen

(b) carbon dioxide

(c)Air

(d) water

8.which one of the following is used in steel industries?

(a)coke

(b) coal tar

(c) petroleum

(d) gasoline

9.metals are extracted from

(a)Ores

(b) coal

(C)sand

(d)none

10.more pollutant  among fossil fuel is

(a) coal

(b)c.n.g

(c) Petrol

(d) Diesel

BitsPrepared By My Student

Bhvya

Class 8

VIDYODAYA ENGLISH MEDIUM HIGH SCHOOL.

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