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Mechanical - UNIT - 7 - Friction - MCQ

151)   

Which factor does not affect the coefficient of friction? 

A.
B.
C.
D.
Answer: C
152)   

Which method is commonly used to measure static friction? 

A.
B.
C.
D.
Answer: A
153)   

 In machinery, frictional losses reduce:

A.
B.
C.
D.
Answer: B
154)   

The angle of repose is equal to the: 

A.
B.
C.
D.
Answer: B
155)   

Ball bearings reduce friction by:

A.
B.
C.
D.
Answer: B
156)   

 In a brake system, friction converts mechanical energy into:

A.
B.
C.
D.
Answer: C
157)   

Which of these is not a way to increase friction?

A.
B.
C.
D.
Answer: C
158)   

What type of friction acts when a car moves on a road? 

A.
B.
C.
D.
Answer: B
159)   

 When the body just starts sliding, the friction is called:

A.
B.
C.
D.
Answer: C
160)   

The effect of excessive friction on machines is:

A.
B.
C.
D.
Answer: C
161)   

 The force of friction always acts: 

A.
B.
C.
D.
Answer: C
162)   

If no external force acts, a body at rest stays at rest because of:

A.
B.
C.
D.
Answer: C
163)   

Which type of friction is always less than others?

A.
B.
C.
D.
Answer: C
164)   

Coefficient of rolling friction is: 

A.
B.
C.
D.
Answer: C
165)   

In workshop tools, high friction causes: 

A.
B.
C.
D.
Answer: A
166)   

Choose the correct matching pair:

A.
B.
C.
D.
Answer: C
167)   

Increasing lubrication between machine parts leads to:

A.
B.
C.
D.
Answer: B
168)   

Friction between tool and workpiece during machining affects:

A.
B.
C.
D.
Answer: A
169)   

Friction can be useful in:

A.
B.
C.
D.
Answer: A
170)   

A frictionless surface means: 

A.
B.
C.
D.
Answer: B
171)   

 The main cause of friction is: 

A.
B.
C.
D.
Answer: B
172)   

Which device uses friction to function properly?

A.
B.
C.
D.
Answer: D
173)   

Which of the following is not affected by friction? 

A.
B.
C.
D.
Answer: C
174)   

 Which action helps to reduce sliding friction?

A.
B.
C.
D.
Answer: C
175)   

A flat metal plate resting on a table experiences:

A.
B.
C.
D.
Answer: B