MCQ - TNPSC JTO
JTO - 540 - Trade - Workshop Calculation Science
540 UNIT 3 Mass Weight Volume Density Speed
33)
Potential energy is:
A.
B.
C.
D.
34)
A 2 kg object at 10 m height has potential energy = ? (g = 10 m/s²)
A.
B.
C.
D.
35)
The unit of power is:
A.
B.
C.
D.
36)
Power is the rate of:
A.
B.
C.
D.
37)
An electric motor does 3000 J of work in 10 seconds. Power = ?
A.
B.
C.
D.
38)
What is the efficiency of a machine that delivers 90 J from 120 J input?
A.
B.
C.
D.
39)
The efficiency of an ideal machine is:
A.
B.
C.
D.
40)
Brake horsepower (BHP) is measured using a:
A.
B.
C.
D.
41)
Work done is zero when:
A.
B.
C.
D.
42)
Energy stored due to motion is called
A.
B.
C.
D.
43)
The SI unit of energy is:
A.
B.
C.
D.
44)
What is the kinetic energy of a 2 kg body moving at 3 m/s?
A.
B.
C.
D.
45)
A body has maximum potential energy when:
A.
B.
C.
D.
46)
Potential energy is zero at:
A.
B.
C.
D.
47)
A 5 kg body is 2 meters above ground. PE = ? (g = 10 m/s²)
A.
B.
C.
D.
48)
If velocity is doubled, kinetic energy becomes:
A.
B.
C.
D.