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Mechanical - UNIT - 7 - Friction - MCQ

126)   

 The ratio of limiting friction to normal reaction is: 

A.
B.
C.
D.
Answer: B
127)   

In automobiles, friction between tire and road helps in:

A.
B.
C.
D.
Answer: B
128)   

Which type of friction is highest in value?

A.
B.
C.
D.
Answer: A
129)   

Which condition increases sliding friction?

A.
B.
C.
D.
Answer: C
130)   

Which is an example where friction is undesirable?

A.
B.
C.
D.
Answer: C
131)   

What is the nature of frictional force?

A.
B.
C.
D.
Answer: A
132)   

The friction which occurs when a body slides over another is:

A.
B.
C.
D.
Answer: B
133)   

 Which of the following does not help in reducing friction? 

A.
B.
C.
D.
Answer: D
134)   

The unit of frictional force is: 

A.
B.
C.
D.
Answer: C
135)   

Which of the following is affected by friction?

A.
B.
C.
D.
Answer: A
136)   

Friction in lathe machine between slides and guides is minimized by:

A.
B.
C.
D.
Answer: B
137)   

The coefficient of friction depends on: 

A.
B.
C.
D.
Answer: C
138)   

What will happen if there is no friction at all?

A.
B.
C.
D.
Answer: C
139)   

 In belt drives, friction helps to:

A.
B.
C.
D.
Answer: C
140)   

Which of the following surfaces will produce least friction?

A.
B.
C.
D.
Answer: B
141)   

 The angle of friction is the angle between: 

A.
B.
C.
D.
Answer: B
142)   

The tangent of angle of friction gives:

A.
B.
C.
D.
Answer: B
143)   

When the applied force equals limiting friction, the body:

A.
B.
C.
D.
Answer: B
144)   

 Which of the following materials is commonly used as a solid lubricant?

A.
B.
C.
D.
Answer: C
145)   

If the angle of friction is 45°, what is the coefficient of friction (μ)? 

A.
B.
C.
D.
Answer: B
146)   

Which condition is necessary for friction to act between two surfaces?

A.
B.
C.
D.
Answer: C
147)   

The instrument used to measure small frictional forces in labs: 

A.
B.
C.
D.
Answer: C
148)   

 Friction is directly proportional to: 

A.
B.
C.
D.
Answer: C
149)   

Which of the following is used to reduce friction in rotating shafts?

A.
B.
C.
D.
Answer: B
150)   

 In workshop tools, friction leads to: 

A.
B.
C.
D.
Answer: B