We have completed the NCERT/CBSE chapter-wise Multiple Choice Questions for Class 8 Science book Chapter 12 Friction with Answers by expert subject teacher for latest syllabus and examination. You can Prepare effectively for the exam taking the help of the Class 8 Science Objective Questions PDF free of cost from here. Students can take a free test of the Multiple Choice Questions of Friction. Each Questions has four options followed by the right answer. Download the Science Quiz Questions with Answers for Class 8 free Pdf and prepare to exam and help students understand the concept very well.
MCQ Questions for Class 8 Science with Answers
Q1. Which of the following is true about friction:
(i) Friction can only slow things down
(ii) Friction is a force that only occurs when an object moves
(iii) Friction is a force that only occurs on rough surfaces
(iv) Friction is a force that occurs only between solids
(ii) Friction is a force that only occurs when an object moves
Q2. Which of the following produces least friction?
(i) Sliding friction
(ii) Rolling friction
(iii) Composite friction
(iv) Static friction
(ii) Rolling friction
Q3. In machine, friction between moving parts is reduced by
(i) Heating machine
(ii) Using powder
(iii) Using lubricants
(iv) Using paints
(iii) Using lubricants
Q4. Friction can be reduced by using
(i) oil
(ii) grease
(iii) powder
(iv) all of these
(iv) all of these
Q5. A matchstick struck on a matchbox catches fire easily because
(i) Friction may cause fire
(ii) Of chemical reaction
(iii) Force heated the match stick
(iv) None of the above
(i) Friction may cause fire
Q6. The substance which reduce friction are called
(i) Lubricants
(ii) Wheels
(iii) Powder
(iv) Graphite
(i) Lubricants
Q7. The easiest way to move a heavy wooden crate is to:
(i) place it on a trolley
(ii) tie a rope one end and pull
(iii) push it
(iv) none of these
x
(i) Lubricants
Q8. Friction can be reduced by using
(i) oil
(ii) grease
(iii) powder
(iv) all of these
(i) oil
Q9. Thermos flask keeps hot liquid hot and cold liquid cold by
(i) Heating
(ii) Friction
(iii) Preventing heat loss
(iv) Cooling
(iii) Preventing heat loss
Q10. The shape of an aeroplane is like a
(i) dog
(ii) bird
(iii) car
(iv) all of these
(ii) bird
Q11. The frictional force exerted by fluids is also called
(i) drug
(ii) drag
(iii) drop
(iv) drown
(ii) drag
Q12. If we apply the force along the right, the friction acts along the:
(i) right direction
(ii) left direction
(iii) can’t say
(iv) none of these
(ii) left direction
Q13. To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?
(i) Stone
(ii) Plastic block
(iii) Wooden block
(iv) Glass block
(i) Stone
Q14. Which force prevents us from slipping while walking on the road?
(i) Muscular force of our body
(ii) Gravitational pull by the earth
(iii) Frictional force
(iv) Balanced forces of nature
(iii) Frictional force
Q15. A toy car released with the same initial speed will travel farthest on
(i) muddy surface
(ii) polished marble surface
(iii) cemented surface
(iv) brick surface
(ii) polished marble surface
Q16. Friction is a /an
(i) Evil and foe
(ii) Evil
(iii) Foe
(iv) None of the options
(i) Evil and foe
Q17. In which of the following friction is helpful:
(i) the engine of car becomes hot after running for some time
(ii) soles of shoes were out after sometime
(iii) pulling a drawer out of a desk
(iv) using a towel to open a tightly closed lid of a bottle
(iv) using a towel to open a tightly closed lid of a bottle
Q18. Which of the following is not a smooth surface?
(i) Surface of wet soap
(ii) Surface of tyres
(iii) Glazed tiles
(iv) Surface of mirror
(ii) Surface of tyres
Q19. Fluids are
(i) gases
(ii) liquids
(iii) gases and liquids both
(iv) none of these
(iii) gases and liquids both
Q20. Force of friction depends on
(i) roughness of surface
(ii) smoothness of surface
(iii) inclination of surface
(iv) all of these
(iv) all of these
Q21. Complete the sentence. Friction always
(i) Opposes the motion
(ii) Helps the motion
(iii) Helps the motion and opposes the motion
(iv) None of the options
(i) Opposes the motion
Q22. What is the value of sliding friction for an object which requires 7 N of force to move it from rest?
(i) 7 N
(ii) Greater than 7 N
(iii) Less than 7 N
(iv) 14 N
(iii) Less than 7 N
Q23. Drag is:
(i) frictional force exerted by solids
(ii) frictional force exerted by liquids
(iii) frictional force exerted by gases
(iv) frictional force exerted by fluids
(iv) frictional force exerted by fluids
Q24. If we apply oil on door hinges, the friction will
(i) increase
(ii) decrease
(iii) disappear altogether
(iv) will remain unchanged
(ii) decrease
Q25. Striking a matchstick produces fire by
(i) Contact force
(ii) Friction
(iii) Chemical reaction
(iv) Physical reaction
(ii) Friction
Q26. Which is a streamlined object?
(i) Boats
(ii) Aeroplanes
(iii) Ships
(iv) All of these
(iv) All of these
Q27. Which Of The Following Is Not An Advantage Of Fiction?
(i) It enables drawing to be made on paper
(ii) It enables fallen things to be picked up
(iii) It enables rubber pads to be rubbed off
(iv) It enables vehicles to move on ground
(iii) It enables rubber pads to be rubbed off
Q28. Which of the following statements is correct?
(i) Rolling is easier than sliding.
(ii) Sliding is easier than rolling.
(iii) Dragging is easier than sliding
(iv) Dragging is easier than rolling.
(i) Rolling is easier than sliding.
Q29. To increase friction:
(i) the surface is made smooth
(ii) the surface is polished
(iii) the surface is made rough
(iv) powder is sprinkled on the surface
(iii) the surface is made rough
Q30. Smooth surface has
(i) less friction
(ii) more friction
(iii) sometimes less and sometimes more
(iv) all of these
(i) less friction
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