BASIC THERMODYNAMICS
1. In highly rarefied gases, the concept of this loses validity
(a) Thermodynamic equilibrium
(b) continuum
(c) stability
(d) Macroscopic view point
2. A closed system is one in which:
(a) mass does not cross boundaries of the system, though energy
may do so
(b) mass crosses the boundary but not the energy
(c) neither mass nor energy crosses the boundaries of the system
(d) both energy and mass cross the boundaries of the system
3. A thermodynamic system is considered to be an isolated one if :
(a) Mass transfer and entropy change are zero
(b) Entropy change and energy transfer are zero
(c) Energy transfer and mass transfer are zero
(d) Mass transfer and volume change are zero
4. Ice kept in a well-insulated thermos flask is an example of which
system?
(a) Closed system
(b) Isolated system
(c) Open system
(d) Non-flow adiabatic system
5. If there is no change in pressure at any point of the system with time,
then the system is said to be in: (a) Chemical equilibrium
(b) Thermal equilibrium
(c) Phase equilibrium
(d) Mechanical equilibrium
6. Thermal equilibrium between two or more bodies exists, when they
are brought together, there is no change in ………………...
(a) Density
(b) Pressure
(c) Temperature
(d) All options are correct
7. The property of a thermodynamic system is:
(a) A path function
(b) A point function
(c) A quantity which does not change in reversible process
(d) A quantity which changes when system undergoes a cycle
8. Which one of the following properties given below is an intensive
property of the system?
(a) Volume
(b) Temperature
(c) Kinetic energy
(d) Potential energy
9. Which of the following are intensive properties?
1. Kinetic Energy
2. Specific Enthalpy
3. Pressure
4. Entropy
Select the correct answer using the code given below:
(a) 1 and 3
(b) 2 and 3
(c) 1, 3 and 4
(d) 2 and 4
10. If the time taken by a system to execute a process through a finite
gradient is infinitely large, the process
(a) becomes reversible
(b) is irreversible
(c) becomes isothermal
(d) is adiabatic
11. Consider the following processes :
1. Extension of a spring
2. Plastic deformation of a material
3. Magnetization of a material exhibiting hysteresis
Which of the above processes are irreversible ?
(a) 1 and 2 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3
12. Internal energy associated with kinetic energy of molecules
is …………………….
(a) nuclear energy
(b) chemical energy
(c) sensible energy
(d) latent energy
13. Zeroth law of thermodynamics forms the basis
of measurement of–
(a) Pressure
(b) Temperature
(c) Heat exchange
(d) Work
14. Under certain polytropic process, value of n = 1
....... process :
(a) Adiabatic
(b) Reversible
(c) Irreversible
(d) Isothermal
15. Isolated system indicates–
(a) Mass of substance cross the boundary
(b) Energy of substance cross the boundary
(c) Both mass and energy of substance cross the
boundary
(d) Both mass and energy of substance does not
cross the boundary
16. Internal Energy is a function of only
(a) Pressure
(b) Temperature (absolute)
(c) Volume
(d) Pressure & Temperature
17. Control volume in a thermodynamic system
refers to–
(a) A specified mass in fluid flow
(b) Mass that moves across the boundary
(c) Fixed region in space for thermodynamic study
(d) Transfer of energy across the boundary
18. Enthalpy is:
(a) internal energy / pressure volume product
(b) internal energy – pressure volume product
(c) internal energy × pressure volume product
(d) internal energy + pressure volume product
19. The area under the T-S diagram curve at any
thermodynamic process represents :
(a) heat rejected only
(b) heat absorbs only
(c) work done during the process
(d) heat absorbed and rejected
20. In a free expansion process
(a) the work done is zero
(b) the heat transfer is zero
(c) the work done and heat transfer both are zero
(d) the work done is zero, but the heat transfer
increases
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