LAWS OF THERMODYNAMICS MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS
LAWS OF THERMODYNAMICS
MULTIPLE CHOICE QUESTIONS
(MCQ) WITH ANSWERS
The study of thermodynamics is based
on the four laws of thermodynamics.
These are zeroth, first, second & third
law.
-
Zeroth law establishes
-
Chemical equilibrium
-
Mechanical equilibrium
-
Chemical and mechanical equilibrium
-
None
ANS: (iv)
-
Zeroth law establishes
-
Chemical equilibrium
-
Mechanical equilibrium
-
Thermal equilibrium
-
None
-
ANS: (iii)
4. In the freezer of a refrigerator, there are four different item at the same temperature. Which law of thermodynamics is applicable?
-
First law
-
Second law
-
Zeroth law
-
None
ANS: (iii)
-
Zeroth law was in existence in thermodynamics earlier than
-
First law
-
Second law
-
Third law
-
None
-
ANS: (iv)
-
Temperature is a
-
Isentropic quantity
-
Mechanical quantity
-
Chemical quantity
-
None
ANS: (iv)
-
Temperature is a
-
Physical quantity
-
Mechanical quantity
-
Iso-thermal quantity
-
None
ANS: (i)
-
Temperature is a
-
Isentropic quantity
-
Isenthalpic quantity
-
Iso-baric quantity
-
None
ANS: (iv)
-
Zeroth law is a law of conservation of
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Mass
-
Energy
-
Mass and energy
-
None
ANS: (iv)
-
Zeroth law is a law of
-
Reversibility
-
Ir-reversibility
-
Reversibility & ir-reversibility
-
None
ANS: (iv)
-
Zeroth law deals with
-
Pressure
-
Volume
-
Enthalpy
-
None
ANS: (iv)
-
Zeroth law deals with
-
Work
-
Heat
-
Both work & heat
-
None
ANS: (iv)
-
Temperature measurement comes under
-
First law of thermodynamics
-
Second law of thermodynamics
-
Third law of thermodynamics
-
None
ANS: (iv)
-
In thermal equilibrium, there is no
I. Mass transfer
ii. Energy transfer
iii. Momentum transfer
iv. None
ANS: (ii)
-
Thermal equilibrium is there if
-
Pressure changes with time
-
Volume changes with time
-
Temperature changes with time
-
None
ANS: (iv)
-
Thermal equilibrium is there if
-
Pressure remains constant
-
Temperature remains constant
-
Volume remains constant
-
None
ANS: (ii)
-
There are three thermodynamic systems. These are having ice in a glass, hot water in a glass & the environment. Which type of equilibrium these will achieve over the passage of time
-
Chemical equilibrium
-
Mechanical equilibrium
-
Thermal equilibrium
-
None
ANS: (iii)
-
Total energy of the universe is
-
(a) Increasing
-
(b) Decreasing
-
(c) Increasing as well as decreasing
-
(d) None
Ans: (d)
-
As per First Law of Thermodynamics, energy can be
Ans:(d)
-
(a) Created
-
(b) Destroyed
-
(c) Created as well as destroyed
-
(d) None
-
As per First Law of Thermodynamics, energy cannot be
(a) Created
(b) Destroyed
(c) Created as well as destroyed
(d) None
Ans:(c)
-
Total energy of the universe is
(a) Increasing
(b) Decreasing
(c) Constant
(d) None
Ans: (c)
-
An intensive property is
(a) Independent of volume
(b) Independent of density
(c) Independent of mass
(d) None
Ans: ©
-
Which of the following is an intensive property?
(a) Volume
(b) Enthalpy
(c) Entropy
(d) None
Ans: (d)
-
Which of the following is an intensive property?
(a) Volume
(b) Enthalpy
(c) Temperature
(d) None
Ans: (c)
-
Which of the following is NOT an intensive property?
(a) Volume
(b) Pressure
(c) Temperature
(d)None
Ans: (a)
-
Heat supplied to a system is
-
(a) Work done –Change in internal energy
-
(b) Work done +Change in internal energy
-
(c) Work done Change in internal energy
-
(d) None
Ans : (b)
-
Conversion of heat energy into mechanical work is
-
(a) 100 %
-
(b) 80%
-
(c) 50%
-
(d) None
Ans: (d)
-
Conversion of heat energy into mechanical work is
-
(a) >100 %
-
(b) <100%
-
(c) =100%
-
(d) None
Ans: (b)s
-
The temperature of a system is
-
(a) Extensive property
-
(b) Intensive property
-
(c) Extensive as well as intensive property
-
(d) None
Ans: (b)
-
Force is an
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(a) Extensive property
-
(b) Intensive property
-
(c) Extensive as well as intensive property
-
(d) None
Ans: (a)
-
First law of thermodynamics is a law of
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(a) Conservation of enthalpy
-
(b)Conservation of entropy
-
(c) Conservation of internal energy
-
(d) None
Ans: (d)
-
First law of thermodynamics is a law of
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(a) Conservation of enthalpy
-
(b) Conservation of entropy
-
(c) Conservation of energy
-
(d) None
Ans: ( c)
-
Which Property is related to the First Law of Thermodynamics?
(a)Enthalpy
(b) Entropy
© Internal energy
(d)None
Ans: ( c )
-
An open system has
-
(a) Only Mass transfer
-
(b) Only Energy transfer
-
(c) Mass as well as energy transfer
-
(d) None
Ans: (c )
-
An closed system has
-
(a) Only Mass transfer
-
(b) Only Energy transfer
-
(c) Mass as well as energy transfer
-
(d) None
Ans: (a )
-
An isolated system has
-
(a) Only Mass transfer
-
(b) Only Energy transfer
-
(c)Mass as well as energy transfer
-
(d) None
Ans: (d )
-
An isolated system has
-
(a) No Mass transfer
-
(b) No Energy transfer
-
(c) No Mass and no energy transfer
-
(d) None
Ans: (c )
-
Among the system, boundary and surrounding, the order is
-
(a) System, surrounding and boundary
-
(b) Surrounding, system and boundary
-
(c) System, boundary and surrounding
-
(d) None
Ans: (c )
-
A system consists of
-
(a) System, boundary and surrounding
-
(b) Pressure, temperature and volume
-
(c) Intensive, extensive and internal energy
-
(d) None
Ans: (a)
-
In a thermodynamic process, which one is NOT a path function?
-
(a) Work done
-
(b) Heat supplied
-
(c) Internal energy
-
(d) None
Ans: (c )
-
In a thermodynamic process, which one is a path function?
-
(a) Work done
-
(b) Enthalpy
-
(c) Internal energy
-
(d) None
Ans: (a )
-
First law of Thermodynamics deals with the Law of
-
(a) Conservation of momentum
-
(b) Conservation of mass
-
(c) Conservation of internal energy
-
(d) None
Ans : (d)
-
Increase in enthalpy causes
-
(a) Increase in volume
-
(b) Increase in pressure
-
(c) Increase in mass
-
(d) None
Ans: (d)
-
During an exothermic reaction, There is
-
(a) Increase in enthalpy
-
(b) Decrease in enthalpy
-
(c) Remains constant
-
(d) None
Ans : (b)
-
During an exothermic reaction, There is
-
(a) Increase in mass
-
(b) Decrease in mass
-
(c) Mass remains constant
-
(d) None
Ans : (b)
-
Unit of enthalpy is
-
(a) kJ/kg K
-
(b) kJ/m3+
-
(c) kJ/kg
-
(d) None
Ans: (c )
-
International unit of temperature is
-
(a) 0C
-
(b) 0K
-
(c) 0F
-
(d) None
Ans: (d)
-
International unit of temperature is
-
(a) C
-
(b) K
-
(c) F
-
(d) None
Ans: (b)
-
International unit of mass is
-
(a) g
-
(b) kg
-
(c) lb
-
(d) None
Ans: (b)
-
International unit of pressure is
-
(a) Pascal
-
(b) mm of Hg
-
(c) bar
-
(d) None
Ans: (c)
-
Example of a open thermodynamic system is
-
(a) Refrigerator
-
(b) Air conditioner
-
(c) Compressor in a refrigerator
-
(d) None
Ans: ( c)
-
Example of a closed thermodynamic system is
-
(a) Evaporator in a Refrigerator
-
(b) Condenser in an Air conditioner
-
(c) Compressor in a refrigerator
-
(d) None
Ans: ( d)
-
Which is the thermodynamic system in a human body ?
-
(a) Open system
-
(b) Closed system
-
(c) Isolated system
-
(d) None
Ans: (a)
-
The S.I. unit of power is
(a) Newton
(b) Pascal
(c) Joule
(d) None
Ans: (d)
-
Which of the following is NOT a point function?
-
(a) Temperature
-
(b) Entropy
-
(c) Pressure
-
(d) None
-
Ans: (d)
-
. Which of the following is NOT a point function?
-
(a) Temperature
-
(b) Entropy
-
(c) Heat
-
(d) None
Ans: (c)
-
Temperature remains constant in
-
(a) Dalton’s Law
-
(b) Charles Law
-
(c) Raoult’s Law
-
(d) None
Ans: (d)
-
Temperature remains constant in
-
(a) Dalton’s Law
-
(b) Charles Law
-
(c) Boyle’s Law
-
(d) None
Ans: (c)
-
It is a law of
-
Reversibility
-
Irreversibility
-
Reversibility and ir-reversibility
-
None
-
ANS: (ii)
-
A heat engine converts what % of heat into work
-
25 %
-
50 %
-
75 %
-
None
-
ANS: (iv)
-
Heat flowing from high temperature body to low temperature body is
-
Refrigeration
-
Heat Transfer
-
Refrigeration and heat transfer
-
None
-
ANS: (ii)
-
Heat flowing from low temperature body to high temperature body is
-
Refrigeration
-
Heat Transfer
-
Refrigeration and heat transfer
-
None
-
ANS: (i)
-
There is no heat transfer in the
-
Isentropic process
-
Isobaric process
-
Adiabatic process
-
None
-
ANS: (iv)
-
Entropy is a measure of
-
Disorder
-
Order
-
Order and disorder
-
None
-
ANS: (i)
-
Heat transfer depends on
-
Entropy difference
-
Enthalpy difference
-
Internal energy difference
-
None
-
ANS: (iv)
-
Heat transfer depends on
-
Temperature difference
-
Pressure difference
-
Internal energy difference
-
None
-
ANS: (i)
-
A Carnot cycle is a
-
Refrigeration cycle
-
Power consuming cycle
-
Power producing cycle
-
None
-
ANS: (iii)
-
A Carnot cycle consists of
-
Ir-reversible processes
-
Reversible processes
-
Ir-reversible and reversible processes
-
None
-
ANS: (ii)
-
COP is maximum for a
-
Carnot cycle
-
Otto cycle
-
Diesel cycle
-
None
-
ANS: (iv)
-
Work input is maximum for a
-
Isentropic compression
-
Isobaric compression
-
Isometric compression
-
None
-
ANS: (iv)
-
Work input is maximum for a
-
Isothermal compression
-
Iso-enthalpy compression
-
Adiabatic compression
-
(iv) None
ANS: (i)
14. Entropy reduction during a reversible process is
-
-
5 %
-
75 %
-
95 %
-
None
-
AND: (iv)
-
Entropy reduction during a reversible process is
-
5
-
75
-
95
-
None
-
AND: (iv)
-
The name of Second law of Thermodynamics is the law of
-
(i) Decreased entropy
-
(ii) Increased entropy
-
(iii) Decreased as well increased entropy
-
None
ANS: (ii)
-
Second law of thermodynamic lead to the discovery of
-
Internal energy
-
Enthalpy
-
Entropy
-
None
-
- ANS: (iii)
-
Which law of thermodynamics governs the
efficiency of a heat engine?
-
Third
-
zeroth
-
First
-
None
-
- ANS: (iv)
-
Which law of thermodynamics governs the efficiency of a heat engine?
-
Second
-
zeroth
-
First
-
None
-
- ANS: (i)
-
Second Law of Thermodynamics deals with
-
Quality of energy
-
Quantity of energy
-
Quality and quantity of energy
-
None
-
- ANS: (i)
-
Which law of thermodynamics governs the feasibility of a process?
-
First
-
Second
-
Third
-
None
-
- ANS: (iv)
-
Which law of thermodynamics governs the feasibility of a process?
-
First
-
Second
-
First and Second
-
None
-
- ANS: (iii)
-
Mathematically second law of thermodynamics represents
-
Firstly ∆s Universe > 0
-
Secondly ∆s Universe < 0
-
∆s Universe = 0
-
NONE
-
ANS: (i)
-
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