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Online Tests
Physics Fsc Part 1 Chapter 11 Online Test MCQs With Answers
Question # 1
If heat engine absorb 400 J and rejects 200 J heat energy, its efficiency will be.
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25%
50%
70%
100%
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Question # 2
The curve representing an adiabatic process is called.
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An adiabatic
An isotherm
Both of these
None of these
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Question # 3
Environmental crisis are also known as
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Population crisis
Entropy crisis
War crisis
Mass crisis
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Question # 4
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 # 5
The efficiency of any heat engine can never be
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+ve
100%
-ve
None of these
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Question # 6
An ideal heat engine can only be 100% efficient if its cold temperature reservoir is at.
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0 K
0
o
C
100 K
100
o
C
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Question # 7
A finite volume of gas consists of
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Small no. of molecules
Large no. of molecule
Average no. of molecule
None of these
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Question # 8
Which one is true for isothermal process.
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Q = 0
W = 0
Q = W(D) Delta U = 0
None of these
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Question # 9
Which remains constant in an adiabatic process.
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Volume
Pressure
entropy
temperature
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Question # 10
The number of spark plug needed in diesel engine is
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0
2
3
4
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Question # 11
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 # 12
During adiabatic process, which factor remains constant.
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Entropy
Pressure
Momentum
Power
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Question # 13
the change in internal energy is defined as
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Q - W
Q-T
Q + P
Q - P
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Question # 14
In thermodynamics system internal energy decrease by 100 J and 100 J of work done on the system then heat lost will be.
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Zero
100 J
200 J
-200 J
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Question # 15
For an ideal gas, the internal energy is directly proportional to.
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Pressure
volume
Mass
Temperature
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Question # 16
Value of triple point of water is given as.
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Zero K
100 K
273.16 K
373.16 K
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Question # 17
The temperature scale which is independent of nature of substance is.
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Thermodynamic scale
Centigrade scale
Fahrenheit scale
Regnault scale
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Question # 18
A device based upon the thermodynamics property of matter is called.
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Calorimeter
Heat engine
thermometer
Voltmeter
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