This quiz works best with JavaScript enabled. Home > Class 8 > Class 8 Science Chapter 12 Friction ā Quiz 3 š Homepage š Download PDF Books š Premium PDF Books Class 8 Science Chapter 12 Friction Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The direction of force of friction is always ..... to the direction of motion A) Same. B) Opposite. C) Unchanged. D) None of these. Show Answer Correct Answer: B) Opposite. 2. How can friction be helpful? A) Erosion of topsoil. B) Wearing down of engine parts. C) Allows brakes of a car to operate. D) Holes in socks. Show Answer Correct Answer: C) Allows brakes of a car to operate. 3. Friction is an evil because A) It produces heat. B) It does not help us in any way. C) Cannot be known. D) It wears out the surfaces which it acts upon. Show Answer Correct Answer: D) It wears out the surfaces which it acts upon. 4. Can Friction be an opposing force? A) Yes, it slows objects down until they stop. B) No, it can't stop objects. C) Sometimes if the object has no mass. D) None of the above. Show Answer Correct Answer: A) Yes, it slows objects down until they stop. 5. The force of friction depends upon A) Nature of surface of contact. B) Material of objects in contact. C) Both 'a' and 'b'. D) None of the above. Show Answer Correct Answer: C) Both 'a' and 'b'. 6. Greater friction causes ..... A) An increase in speed. B) A decrease in speed. C) Both of these. D) Neither increase or decrease. Show Answer Correct Answer: B) A decrease in speed. 7. A toy car released with same initial speed will travel the farthest on A) Muddy surface. B) Cemented surface. C) Polished marble surface. D) Brick surface. Show Answer Correct Answer: C) Polished marble surface. 8. Which of the following is responsible for wearing out of bicycle tyres? A) A) Muscular force. B) (b) Magnetic force. C) (c) Frictional force. D) (d) Electrostatic force. Show Answer Correct Answer: C) (c) Frictional force. 9. Which of the following is an example of friction that is harmful? A) Pencil marking on paper. B) Engine parts wearing out. C) Sand placed on ice in the winter. D) Using an eraser to erase marks. Show Answer Correct Answer: B) Engine parts wearing out. 10. Another name for specially shaped bodies to reduce friction ..... A) Streamline flow. B) Streamlined bodies. C) Air cutters. D) Friction reducing bodies. Show Answer Correct Answer: B) Streamlined bodies. 11. Motion of object in straight line is called A) Translatory. B) Rotatory. C) Oscillator Re. D) Velocity. Show Answer Correct Answer: A) Translatory. 12. Fluids are A) Liquids. B) Gases. C) Both (a) and (b). D) None of these. Show Answer Correct Answer: C) Both (a) and (b). 13. Friction A) Makes the sole of shoes better. B) Rips the shoes apart. C) Makes the shoes dirty. D) Damages the sole of shoes. Show Answer Correct Answer: D) Damages the sole of shoes. 14. Which of the following is not a smooth surface? A) Surface of wet soap. B) Surface of tyres. C) Glazed tiles. D) Surface of mirror. Show Answer Correct Answer: B) Surface of tyres. 15. Displacement by time A) Velocity. B) Speed. C) Acceleration. D) Force. Show Answer Correct Answer: A) Velocity. 16. A football player will use which items to increase friction while playing? A) Cleats. B) Jersey. C) Gloves. D) Shoulder pads. E) Cleats and gloves. Show Answer Correct Answer: E) Cleats and gloves. 17. What is the limiting force of friction? A) The force which limits friction. B) Motion. C) The maximum value of friction between two surfaces. D) None of the above. Show Answer Correct Answer: C) The maximum value of friction between two surfaces. 18. Friction due to fluids is called A) Force. B) Pressure. C) Friction. D) DragTagsmcq. Show Answer Correct Answer: D) DragTagsmcq. 19. What are 2 factors that determine the amount of friction between 2 objects? A) Force and roughness between surfaces. B) Hills and valleys and how smooth or rough the surface is. C) Amount of force and amount of surface the comes in contact. D) The force and the weight exerted on the surfaces. Show Answer Correct Answer: A) Force and roughness between surfaces. 20. Which of the following has a streamline body? A) Dog. B) Jeep. C) Truck. D) Eagle. Show Answer Correct Answer: D) Eagle. 21. Fluid friction depends on A) The speed of the object. B) Shape of the object. C) The nature of the fluid. D) All of these. Show Answer Correct Answer: D) All of these. 22. When two surfaces rub, the irregularities of one surface get caught on those of the other surface? A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 23. Can friction be entirely eliminated? A) Yes, It can be. B) No, It can't be. C) All the above. D) None of the above. Show Answer Correct Answer: B) No, It can't be. 24. ..... helps reduce friction A) Adding spikes to soles of shoes. B) Using anti-skid tiles on the bathroom floor. C) Spreading sand/gravel on icy roads. D) Smearing oil on moving parts of machines. Show Answer Correct Answer: D) Smearing oil on moving parts of machines. 25. Wheels on a skateboard most likely experience ..... A) Rolling Friction. B) Sliding Friction. C) Fluid Friction. D) Static Friction. Show Answer Correct Answer: A) Rolling Friction. ā PreviousNext āRelated QuizzesClass 8 Science Chapter 12 Friction Quiz 1Class 8 Science Chapter 12 Friction Quiz 2Class 8 Science Chapter 12 Friction Quiz 4Class 8 Science Chapter 12 Friction Quiz 5Class 8 Science Chapter 12 Friction Quiz 6Class 8 Science Chapter 12 Friction Quiz 7Class 8 Science Chapter 12 Friction Quiz 8Class 8 Civics Chapter 1 The Indian Constitution QuizClass 8 Civics Chapter 10 Law And Social Justice QuizClass 8 Civics Chapter 2 Understanding Secularism QuizClass 8 Civics Chapter 3 Why Do We Need A Parliament QuizClass 8 Civics Chapter 4 Understanding Laws QuizClass 8 Civics Chapter 5 The Judiciary QuizClass 8 Civics Chapter 6 Understanding Our Criminal Justice System QuizClass 8 Civics Chapter 7 Understanding Marginalisation QuizClass 8 Civics Chapter 8 Confronting Marginalisation QuizClass 8 Civics Chapter 9 Public Facilities QuizClass 8 English Chapter 1 The Best Christmas Present In The World QuizClass 8 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