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Online Tests
Physics Fsc Part 1 Chapter 11 Online Test MCQs With Answers
Question # 1
The efficiency of a Carnot Heat Engine is 100% if temperature of sink T2 is.
Choose an answer
0
o
C
0 K
0
o
F
100 K
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Question # 2
Efficiency of a heat engine working between 27
o
C and 32
o
C will be.
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50%
90%
40%
62%
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Question # 3
Which is the process in which temperature of the system remains constant.
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Adiabatic process
Isochoric process
Isothermal process
Isobaric process
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Question # 4
The potential energy to the molecules of an ideal gas is considered to be.
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Maximum
Zero
1/2 kx
2
1/2 kx
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Question # 5
The number of spark plug needed in diesel engine is
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0
2
3
4
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Question # 6
The entropy of the universe with passage of time is.
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Increases
Decreases
Remain constant
Increases and decreases
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Question # 7
If the temperature of a gas is constant then <1/2 mv2> of the molecules of gas will be.
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Constant
Zero
Increase
Decrease
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Question # 8
During adiabatic process, which factor remains constant.
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Entropy
Pressure
Momentum
Power
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Question # 9
Entropy remains constant.
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Isothermal process
Adiabatic process
Isochoric process
Isobaric process
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Question # 10
Unite of thermodynamics scale of temperature is.
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Centigrade
Fahrenheit
Kelvin
Celsius
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Question # 11
the work done in isochoric process is.
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Constant
Variable
Zero
Depend upon condition
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Question # 12
A diatomic gas molecules has
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Translational energy only
Rotational energy only
Vibrational energy only
All translational, Rotational and vibrational energy
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Question # 13
A system does 600 J of work and at the same time has its internal energy increased by 320 J. How much heat has been supplied.
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28o J
920 J
600 J
200 J
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Question # 14
A gas performs 10 J of work while expanding adiabatically. the change in its internal energy is.
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10 J
-10 J
100 J
-200 J
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Question # 15
The Carnot cycle can be shown by which graph
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P - T graph
P - V Graph
V- T graph
PV -T graph
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Question # 16
The efficiency of heat engine whose sink is at 17
o
C and source at 200
o
C is.
Choose an answer
38%
63%
80%
90%
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Question # 17
An ideal reversible heat engine has
Choose an answer
100% efficiency
Highest efficiency
80%
90%
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