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Mechanical - UNIT - 7 - Friction - MCQ

76)   

Friction helps in walking by: 

A.
B.
C.
D.
Answer: C
77)   

In a workshop, what is applied on machine ways to reduce friction?

A.
B.
C.
D.
Answer: B
78)   

 Sliding friction is:

A.
B.
C.
D.
Answer: B
79)   

In workshop vices, friction is useful to:

A.
B.
C.
D.
Answer: C
80)   

Which condition gives zero friction?

A.
B.
C.
D.
Answer: B
81)   

Which of the following is not a method to reduce friction? 

A.
B.
C.
D.
Answer: D
82)   

Which of the following is the best lubricant in high-speed rotating machines?

A.
B.
C.
D.
Answer: D
83)   

What kind of friction occurs in hydraulic systems?

A.
B.
C.
D.
Answer: D
84)   

Which material is commonly added to oil to improve lubrication?

A.
B.
C.
D.
Answer: C
85)   

The function of a bearing in machines is to:

A.
B.
C.
D.
Answer: C
86)   

 What will happen if grease is not used in a bearing?

A.
B.
C.
D.
Answer: C
87)   

Friction in machines converts mechanical energy into:

A.
B.
C.
D.
Answer: C
88)   

Which of the following causes wear and tear in tools?

A.
B.
C.
D.
Answer: B
89)   

Which of the following is used in machines to reduce rolling friction?

A.
B.
C.
D.
Answer: C
90)   

Which of these helps to increase friction where needed in machines? 

A.
B.
C.
D.
Answer: B
91)   

In mechanical systems, friction is desirable when: 

A.
B.
C.
D.
Answer: B
92)   

What kind of friction is minimum among the types?

A.
B.
C.
D.
Answer: C
93)   

 In lathe machines, lubrication is provided mainly to: 

A.
B.
C.
D.
Answer: C
94)   

High friction in machines results in: 

A.
B.
C.
D.
Answer: A
95)   

Which law states that friction is proportional to normal force? 

A.
B.
C.
D.
Answer: C
96)   

 Frictional heat in cutting operations is controlled by:

A.
B.
C.
D.
Answer: B
97)   

When friction is eliminated completely, what happens? 

A.
B.
C.
D.
Answer: C
98)   

 Which type of friction is responsible for holding objects on inclined planes?

A.
B.
C.
D.
Answer: A
99)   

Lubrication helps in:

A.
B.
C.
D.
Answer: C
100)   

In metal cutting, which type of friction mostly occurs between tool and chip?

A.
B.
C.
D.
Answer: C