MCQ Questions for Class 8 Science Chapter 12 : NCERT CBSE RBSE other Board MCQ Questions for Class 8 Science Chapter 12 Friction with Answers Pdf free download. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern.
MCQ Questions for Class 8 Science Chapter 12 Friction with Answers
Q1. The hinges of creaking doors are oiled to
(a)keep them clean
(b) open and close them easily
(c) reduce noise and wears and tear
(d) none of these
Answer: (c) reduce noise and wears and tear
Q2. Friction is a
(a) non-contact force
(b) contact force
(c) magnetic force
(d) electrostatic force
Answer: (b) contact force
Q3. A matchstick catches fire when struck against the side of the matchbox because:
(a) of the chemicals
(b ) of friction
(c) friction produces a spark and the
(d) none of these chemicals catches fire
Answer: (c) friction produces a spark and the
Q4. Which of the following produces least friction?
(a) Sliding friction
(b) Rolling friction
(c) Composite friction
(d) Static friction
Answer: (b) Rolling friction
Q5. Which of the following is true about friction:
(a) Friction can only slow things down
(b) Friction is a force that only occurs when an object moves
(c) Friction is a force that only occurs on rough surfaces
(d) Friction is a force that occurs only between solids
Answer: (b) Friction is a force that only occurs when an object moves
Q6. Friction always
(a) opposes the motion
(b) helps the motion
(c) both (a) and (b)
(d) none of these
Answer: (a) opposes the motion
Q7. Talcum powder should not be spilled on the floor of room because:
(a) it will stain the floor
(b) it may cause us to slip and fall
(c) it is messy
(d) none of these
Answer: (b) it may cause us to slip and fall
Q8. Friction can be reduced by using
(a) oil
(b) grease
(c) powder
(d) all of these
Answer: (d) all of these
Q9. The easiest way to move a heavy wooden crate is to:
(a) place it on a trolley
(b) tie a rope one end and pull
(c) push it
(d) none of these
Answer: (a) place it on a trolley
Q10. Static friction is less than
(a) sliding friction
(b) rolling friction
(c) both (a) and (b)
(d) none of these
Answer: (d) none of these
Q11. The two common forces that are acting everywhere around us are:
(a) gravity and friction
(b) gravity and magnetic force
(c) electrostatic force and gravity
(d) friction and magnetic force
Answer: (a) gravity and friction
Q12. 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) irrespective of whether the objects are solid, liquid or gaseous.
Q13. If we apply the force along the right, the friction acts along the:
(a) right direction
(b) left direction
(c) can’t say
(d) none of these
Answer: (b) left direction
Q14. 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) Stone
Q15. Which of the following is true:
(a) We write on a paper with pen due to friction
(b) A nail is fixed in the wall due to friction
(c) Soles of shoes wear out due of friction
(d) All of these
Answer: (d) All of these
Q16. The shape of an aeroplane is like a
(a) dog
(b) bird
(c) car
(d) all of these
Answer: (b) bird
Q17. Gymnasts apply some coarse substance on their hands to:
(a) increase friction for better grip
(b) decrease friction
(c) play fast
(d) none of these
Answer: (a) increase friction for better grip
Q18. Friction is
(a) foe
(b) friend
(c) both (a) and (b)
(d) none of these
Answer: (c) both (a) and (b)
Q19. In which of the following friction is troublesome:
(a) sharpening a knife by rubbing it against a stone
(b) applying the brekes to stop a cycle.
(c) walking on a wet road
(d) rubbing the matchstick with the side of matchbox before burning it
Answer: (c) walking on a wet road
Q20. Friction due to fluids is called
(a) force
(b) pressure
(c) friction
(d) drag
Answer: (d) drag
