Friction MCQs | Friction Short Questions(MCQs) & Answers

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Questions
41 Which of the following is used in powdered form as lubricant?
A Graphite
B Chalk
C Salt
D Sugar

Answer: Graphite
42 Increasing friction is necessary for which of the following?
A Free wheel of bicycle
B Bicycle handle bar
C Chain of bicycle
D Ball bearing in front wheel

Answer: Bicycle handle bar
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43 Least amount of friction is required in which of the following sports?
A Car Race
B Football
C Ice Skating
D none of these

Answer: Ice Skating
44 Which motion has magnitude of static frictional force directly proportional to normal reaction?
A Actual motion
B Impending motion
C Both a. and b.
D All of above

Answer: Impending motion
45 Frictional force depends on ________
A surface area in contact
B roughness of surface
C both a. and b.
D All of the above

Answer: roughness of surface
46 Which belt is used to transmit power at high speeds?
A Flat belt
B V belt
C Both a. and b.
D None of the above

Answer: V belt
47 What is the relation between tight side and slack side for a flat belt?
A (Tight side x slack side) = eμβ
B (Tight side / slack side) = eμβ
C (Tight side + slack side) = eμβ
D None of the above

Answer: (Tight side / slack side) = eμβ
48 Rolling friction is smaller than?
A Sliding friction
B Static friction
C Fluid friction
D All of the above

Answer: All of the above
49 Which one of these characteristics does a smooth surface has?
A Less frictional force
B More frictional force
C Sometimes less and sometimes more force
D All of above

Answer: Less frictional force

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