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MCQ - TNPSC JTO

JTO - 540 - Trade - Workshop Calculation Science

UNIT - 7 - Friction

97)   

When friction is eliminated completely, what happens? 

A.
B.
C.
D.
98)   

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

A.
B.
C.
D.
99)   

Lubrication helps in:

A.
B.
C.
D.
100)   

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

A.
B.
C.
D.
101)   

When the angle of friction is 45°, the coefficient of friction is:

A.
B.
C.
D.
102)   

Frictional force always acts:

A.
B.
C.
D.
103)   

 Match the following:

| A. Static friction | 1. Motion between surfaces 
| B. Sliding friction | 2. No motion but contact 
| C. Rolling friction | 3. Ball bearings 
| D. Fluid friction | 4. Air or liquid resistance

A.
B.
C.
D.
104)   

The main reason for applying lubrication in a gearbox is:

A.
B.
C.
D.
105)   

 Which condition will not reduce friction?

A.
B.
C.
D.
106)   

Friction helps in holding nails in the wall because of:

A.
B.
C.
D.
107)   

Which one increases wear and energy loss in machines? 

A.
B.
C.
D.
108)   

 Angle of repose is equal to: 

A.
B.
C.
D.
109)   

Which of the following helps increase friction in bicycle pedals?

A.
B.
C.
D.
110)   

 Which one is not an effect of friction in workshops?

A.
B.
C.
D.
111)   

If the coefficient of friction is 0, then the body:

A.
B.
C.
D.
112)   

What is the correct SI unit of the coefficient of friction (μ)?

A.
B.
C.
D.