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Mechanical - UNIT - 7 - Friction - MCQ

176)   

Friction helps in which of the following activities?

A.
B.
C.
D.
Answer: C
177)   

Which of the following materials would likely have highest friction?

A.
B.
C.
D.
Answer: B
178)   

 In machining, friction between chip and tool affects:

A.
B.
C.
D.
Answer: B
179)   

Lubrication helps by forming: 

A.
B.
C.
D.
Answer: C
180)   

Friction increases when:

A.
B.
C.
D.
Answer: C
181)   

The force required to keep a body in motion is called:

A.
B.
C.
D.
Answer: B
182)   

Friction causes ______ in moving parts of machines.

A.
B.
C.
D.
Answer: C
183)   

 Limiting friction is:

A.
B.
C.
D.
Answer: A
184)   

Friction can be increased by:

A.
B.
C.
D.
Answer: C
185)   

 Which of the following machines uses the principle of friction?

A.
B.
C.
D.
Answer: B
186)   

 In belt drives, slipping is avoided by:

A.
B.
C.
D.
Answer: C
187)   

 In friction, the direction of force is always:

A.
B.
C.
D.
Answer: B
188)   

 Self-locking in screws is due to:

A.
B.
C.
D.
Answer: B
189)   

Lubricants are used in machines to:

A.
B.
C.
D.
Answer: C
190)   

Angle of friction increases with:

A.
B.
C.
D.
Answer: C
191)   

When a body just begins to slide, the friction is:

A.
B.
C.
D.
Answer: D
192)   

 Friction is a:

A.
B.
C.
D.
Answer: A
193)   

The unit of coefficient of friction is:

A.
B.
C.
D.
Answer: B
194)   

 In a bench vice, friction helps in: 

A.
B.
C.
D.
Answer: B
195)   

The relation between angle of friction (θ) and coefficient of friction (μ) is: 

A.
B.
C.
D.
Answer: B
196)   

 Which of the following is a disadvantage of friction? 

A.
B.
C.
D.
Answer: B
197)   

Friction acts only when:

A.
B.
C.
D.
Answer: B
198)   

When a person walks, which friction helps in forward motion?

A.
B.
C.
D.
Answer: A
199)   

 Friction between moving car tyres and road is:

A.
B.
C.
D.
Answer: C
200)   

Which method is not effective to reduce friction? 

A.
B.
C.
D.
Answer: D