MCQ - TNPSC JTO
JTO - 540 - Trade - Workshop Calculation Science
UNIT - 7 - Friction
65)
What happens to friction when surface roughness increases?
A.
B.
C.
D.
66)
What is the nature of frictional force?
A.
B.
C.
D.
67)
When a body slides over another, the friction acting is
A.
B.
C.
D.
68)
In machines, lubricant acts as a:
A.
B.
C.
D.
69)
The angle of friction increases when:
A.
B.
C.
D.
70)
Friction between tyres and road is an example of:
A.
B.
C.
D.
71)
In workshop practice, oiling is done to:
A.
B.
C.
D.
72)
Which of the following is used to measure coefficient of friction?
A.
B.
C.
D.
73)
Which of the following has maximum coefficient of friction?
A.
B.
C.
D.
74)
In metal cutting, friction is reduced by:
A.
B.
C.
D.
75)
Which friction is most desirable in brakes?
A.
B.
C.
D.
76)
Friction helps in walking by:
A.
B.
C.
D.
77)
In a workshop, what is applied on machine ways to reduce friction?
A.
B.
C.
D.
78)
Sliding friction is:
A.
B.
C.
D.
79)
In workshop vices, friction is useful to:
A.
B.
C.
D.
80)
Which condition gives zero friction?
A.
B.
C.
D.