THERMODYNAMICS-MCQs
SET A
1. The term "thermodynamics" comes from Greek words "therme" and "dynamis" which means _______.
• A. Heat power
• B. Heat transfer
• C. Heat energy
• D. Heat motion
2. The term "thermodynamics" was first used in 1849 in the publication of a
• A. Rudolph Clausius
• B. William Rankine
• C. Lord Kelvin
• D. Thomas Savery
3. What law asserts that energy is a thermodynamic property?
• A. First law of Thermodynamics
• B. Second law of Thermodynamics
• C. Third law of Thermodynamics
• D. Zeroth law of Thermodynamics
4. What law asserts that energy has quality as well as quantity?
• A. First law of Thermodynamics
• B. Second law of Thermodynamics
• C. Third law of Thermodynamics
• D. Zeroth law of Thermodynamics
5. The macroscopic approach to the study of thermodynamics does not require a knowledge of the behavior of individual
particles is called _____.
• A. Dynamic thermodynamics
• B. Static thermodynamics
• C. Statistical thermodynamics
• D. Classical thermodynamics
6. What is the more elaborate approach to the study of thermodynamics and based on the average behavior of large groups of
individual particles?
• A. Dynamic thermodynamics
• B. Static thermodynamics
• C. Statistical thermodynamics
• D. Classical thermodynamics
7. What is defined a region in space chosen for study?
• A. Surroundings
• B. System
• C. Boundary
• D. Volume
8. The first law of thermodynamics is based on which of the following principles?
• A. Conservation of mass
• B. Conservation of energy
• C. Action and reaction
• D. The entropy-temperature relationship
9. What is the mass or region outside the system called?
• A. Surroundings
• B. Boundary
• C. Volume
• D. Environment
10. What is the real or imaginary surface that separates the system from its surroundings?
• A. Division
• B. Wall
• C. Boundary
• D. Interface
11. A system which consists of fixed amount of mass and no mass can cross its boundary called _____.
• A. Equilibrium system
• B. Thermal equilibrium system
• C. Open system
• D. Closed system
12. A system in which even energy is not allowed to cross the boundary is called ____.
• A. Closed system
• B. Exclusive system
• C. Isolated system
• D. Special system
13. A system in which there is a flow of mass is known as _____.
• A. Equilibrium system
• B. Isolated system
• C. Open system
• D. Closed system
14. Open system usually encloses which of the following devices?
• A. Compressor
• B. Turbine
• C. Nozzle
• D. All of the above
15. The boundaries of a control volume, which may either real or imaginary is called _____.
• A. Control boundary
• B. Control system
• C. Interface
• D. Control surface
16. Any characteristic of a thermodynamics system is called a _____.
• A. Property
• B. Process
• C. Phase
• D. Cycle
17. How are thermodynamic properties classified?
• A. Physical and chemical
• B. Intensive and extensive
• C. Real and imaginary
• D. Homogeneous and heterogeneous
18. The thermodynamic properties that are independent on the size of the system is called _____.
• A. Extensive property
• B. Intensive property
• C. Open property
• D. Closed property
19. The thermodynamic properties that are dependent on the size or extent of the system is called _____.
• A. Extensive property
• B. Intensive property
• C. Open property
• D. Closed property
20. Which is NOT an intensive property of thermodynamics?
• A. Temperature
• B. Mass
• C. Pressure
• D. Density
21. Which is NOT an extensive property of thermodynamics?
• A. Density
• B. Mass
• C. Volume
• D. Energy
22. Extensive properties per unit mass are called _____.
• A. Specific properties
• B. Relative properties
• C. Unit properties
• D. Phase properties
23. A system is in ______ equilibrium if the temperature is the same throughout the entire system.
• A. Static
• B. Thermal
• C. Mechanical
• D. Phase
24. A system is in ______ equilibrium if there is no change in pressure at any point of the system with time.
• A. Pressure
• B. Thermal
• C. Mechanical
• D. Phase
25. If a system involves two phases, it is in ______ equilibrium when the mass of each phase reaches an equilibrium level and
stays there.
• A. Chemical
• B. Thermal
• C. Mechanical
• D. Phase
26. A system is in ______ equilibrium of its chemical composition does not change with time, i.e., no chemical reaction occurs.
• A. Chemical
• B. Thermal
• C. Mechanical
• D. Phase
27. "The state of a simple compressible system is completely specified by two independent, intensive properties". This is
known as ______.
• A. Equilibrium postulate
• B. State postulate
• C. Environment postulate
• D. Compressible system postulate
28. What is the unit of the total energy of the system?
• A. Kj
• B. Kj/Kg
• C. Kg
• D. g
29. Without electrical, mechanical, gravitational, surface tension and motion effects, a system is called _____ system.
• A. Simple
• B. Simple compressible
• C. Compressible
• D. Independent
30. What refers to any change that a system undergoes from one equilibrium state to another equilibrium state?
• A. Process
• B. Path
• C. Phase
• D. Cycle
31. What refers to the series of state through which a system passes during a process?
• A. Path
• B. Phase
• C. Cycle
• D. Direction
32. How many independent properties are required to completely fix the equilibrium state of a pure gaseous compound?
• A. 4
• B. 3
• C. 2
• D. 1
33. What is a process in which the system remains infinitesimally closed to an equilibrium state at all times?
• A. Path equilibrium process
• B. Cycle equilibrium process
• C. Phase equilibrium process
• D. Quasi-state or quasi- equilibrium process
34. A closed system may refer to ______.
• A. Control mass
• B. Control volume
• C. Control energy
• D. Control temperature
35. An open system may refer to ______.
• A. Control mass
• B. Control volume
• C. Control energy
• D. Control temperature
36. A system is said to be in thermodynamic equilibrium if it maintains ______ equilibrium.
• A. Mechanical and phase
• B. Thermal and chemical
• C. Thermal, mechanical and chemical
• D. Thermal, phase, mechanical and chemical
37. What is a process with identical end states called?
• A. Cycle
• B. Path
• C. Phase
• D. Either path or phase
38. What is a process during which the temperature remains constant?
• A. Isobaric process
• B. Isothermal process
• C. Isochoric process
• D. Isometric process
39. What is a process during which the pressure remains constant?
• A. Isobaric process
• B. Isothermal process
• C. Isochoric process
• D. Isometric process
40. What is a process during which the specific volume remains constant?
• A. Isobaric process
• B. Isothermal process
• C. Isochoric or isometric process
• D. Isovolumetric process
41. The prefix "iso" used to designate a process means ______.
• A. Cannot be interchanged
• B. Remains constant
• C. Approximately equal
• D. Slight difference
42. What does the term "steady" implies?
• A. No change with volume
• B. No change with time
• C. No change with location
• D. No change with mass
43. What does the tem "uniform" implies?
• A. No change with volume
• B. No change with time
• C. No change with location
• D. No change with mass
44. What is defined as a process during which a fluid flows through a control volume steadily?
• A. Transient-flow process
• B. Steady and uniform process
• C. Uniform-flow process
• D. Steady-flow process
45. The sum of all the microscopic form of energy is called _____.
• A. Total energy
• B. Internal energy
• C. System energy
• D. Phase energy
46. What type of system energy is related to the molecular structure of a system?
• A. Macroscopic form of energy
• B. Microscopic form of energy
• C. Internal energy
• D. External energy
47. What form of energy refers to those a system possesses as a whole with respect to some outside reference frame, such as
potential and kinetic energies?
• A. Macroscopic form of energy
• B. Microscopic form of energy
• C. Internal energy
• D. External energy
48. Who coined the word "energy" in 1807?
• A. William Rankine
• B. Rudolph Clausius
• C. Lord Kelvin
• D. Thomas Young
49. The molecules of a gas moving through space with some velocity possesses what kind of energy?
• A. Translational energy
• B. Spin energy
• C. Rotational kinetic energy
• D. Sensible energy
50. The electrons in an atom which rotate about the nucleus possess what kind of energy?
• A. Translational energy
• B. Spin energy
• C. Rotational kinetic energy
• D. Sensible energy