General Science #21 Multiple Choice Questions

GENERAL SCIENCE #21

MULTIPLE CHOICE QUESTIONS

1. The pressure which is exerted by air around us is known as which of the following?

(a) Force

(b) Atmospheric pressure

(c) Muscular force

(d) Friction

Answer: (b)

2. What is called the force acting on per unit area?

(a) Non-contact forces

(b) Contact forces

(c) Force

(d) Pressure

Answer: (d)

3. A …………… exerted by an object on another is a force.

(a) push or pull

(b) contact or non-contact force

(c) pressure

(d) magnitude

Answer: (a)

4. What is called the force exerted by the earth to pull the object towards itself?

(a) Electrostatic force

(b) Gravitational force

(c) Muscular force

(d) Contact force

Answer: (b)

5. Muscular force is also known as which of the following?

(a) Non-contact force

(b) Contact force

(c) Gravitational force

(d) Magnetic force

Answer: (b)

6. What is called the force exerted by a charged body on another char?

(a) Gravitational force

(b) Electrostatic force

(c) Non-contact force

(d) Contact force

Answer: (b)

7. Force changes which of the following?

(a) Motion of body

(b) Speed of body

(c) Shape of body

(d) All of the above

Answer: (d)

8. What is called the force exerted by our muscle?

(a) Electrostatic force

(b) Muscular force

(c) Gravitational force

(d) Non-contact force

Answer: (b)

9. 1 kilogram weight is equal to which of the following?

(a) 98 N

(b) 9.8 N

(c) 0.98 N

(d) 0.098 N

Answer: (b)

10. A spring balance is used for measuring which of the following?

(a) Mass

(b) Weight

(c) Pressure

(d) Speed

Answer: (b)

11. What is a friction?

(a) Non-contact force

(b) Contact force

(c) Magnetic force

(d) Electrostatic force

Answer: (b)

12. Which of the following produces least friction?

(a) Sliding friction

(b) Rolling friction

(c) Composite friction

(d) Static friction

Answer: (b)

13. Friction always ……………

(a) opposes the motion.

(b) helps the motion.

(c) Both ‘a’ and ‘b’

(d) None of the above

Answer: (a)

14. Friction can be reduced by using which of the following?

(a) Oil

(b) Grease

(c) Powder

(d) All of the above

Answer: (d)

15. Static friction is less than which of the following?

(a) Sliding friction

(b) Rolling friction

(c) Both ‘a’ and ‘b’

(d) None of the above

Answer: (d)

16. Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play ……………

(a) only if the objects are solid.

(b) only if one of the two objects is liquid.

(c) only if one of the two objects is gaseous.

(d) irrespective of whether the objects are solid, liquid or gaseous.

Answer: (d)

17. To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?

(a) Stone

(b) Plastic block

(c) Wooden block

(d) Glass block

Answer: (a)

18. The shape of an aeroplane is like which of the following?

(a) Dog

(b) Bird

(c) Car

(d) Cat

Answer: (b)

19. Fiction is ……………

(a) a foe.

(b) a friend.

(c) Both ‘a’ and ‘b’

(d) None of the above

Answer: (c)

20. Friction due to fluids is called which of the following?

(a) Force

(b) Pressure

(c) Friction

(d) Drag

Answer: (d)