Thermodynamics MCQ

1. What is another name for a state a system is said to be in when it is in thermodynamic equilibrium with its environment?

Answer

Correct Answer: Dead state

Note: This Question is unanswered, help us to find answer for this one

2. What would each gas exert if it existed alone at the mixture temperature and volume?

Answer

Correct Answer: Pressure

Note: This Question is unanswered, help us to find answer for this one

3. What is the name of the law that says the pressure of a gas mixture is equal to the sum of the pressures each gas would exert if it existed alone at the mixture temperature and volume?

Answer

Correct Answer: Dalton's law of additive pressures

Note: This Question is unanswered, help us to find answer for this one

4. What kind of relation is the derivatives of a function of two variables related in?

Answer

Correct Answer: Cyclic

Note: This Question is unanswered, help us to find answer for this one

5. What can be used to show that the derivatives of a function of two variables are related in a cyclic manner?

Answer

Correct Answer: Cyclic relation of partial derivatives

Note: This Question is unanswered, help us to find answer for this one

6. What are processes that allow a system to undergo state changes called?

Answer

Correct Answer: Cycle

Note: This Question is unanswered, help us to find answer for this one

7. A system can undergo what if there's a cycle that returns it to the initial state?

Answer

Correct Answer: State changes

Note: This Question is unanswered, help us to find answer for this one

8. What is the ratio of cylinder volumes after and before the combustion process?

Answer

Correct Answer: Cutoff ratio rc

Note: This Question is unanswered, help us to find answer for this one

9. What is the ratio of cylinder volumes after and before the combustion process known as?

Answer

Correct Answer: Cutoff ratio

Note: This Question is unanswered, help us to find answer for this one

10. What is the critical point of a substance?

Answer

Correct Answer: Volume

Note: This Question is unanswered, help us to find answer for this one

11. What is the volume of a substance at the critical point?

Answer

Correct Answer: Critical volume

Note: This Question is unanswered, help us to find answer for this one

12. What is the temperature at which a substance changes form?

Answer

Correct Answer: Critical temperature

Note: This Question is unanswered, help us to find answer for this one

13. What is the temperature at the critical point of a substance?

Answer

Correct Answer: Tcr

Note: This Question is unanswered, help us to find answer for this one

14. When is the Mach number one?

Answer

Correct Answer: Unity

Note: This Question is unanswered, help us to find answer for this one

15. What is the ratio of the stagnation to static properties when the Mach number is unity?

Answer

Correct Answer: Critical ratios

Note: This Question is unanswered, help us to find answer for this one

16. What's the Mach number at which a fluid's properties are considered to be its most important?

Answer

Correct Answer: Unity

Note: This Question is unanswered, help us to find answer for this one

17. What are the properties of a fluid at a location where the Mach number is unity?

Answer

Correct Answer: Critical properties

Note: This Question is unanswered, help us to find answer for this one

18. What does critical pressure mean?

Answer

Correct Answer: Critical point

Note: This Question is unanswered, help us to find answer for this one

19. What is the pressure of a substance at the critical point?

Answer

Correct Answer: Critical pressure Pcr

Note: This Question is unanswered, help us to find answer for this one

20. What is a critical point?

Answer

Correct Answer: The point at which the saturated liquid and saturated vapour states are identical

Note: This Question is unanswered, help us to find answer for this one

21. What is defined as the point at which the saturated liquid and saturated vapour states are identical?

Answer

Correct Answer: Critical point

Note: This Question is unanswered, help us to find answer for this one

22. What does the equation set equal to zero involve?

Answer

Correct Answer: Stoichiometric coefficients

Note: This Question is unanswered, help us to find answer for this one

23. What is the name of the equation set equal to zero that involves the stoichiometric coefficients and the molar Gibbs functions of the reactants and the products in the equilibrium reaction?

Answer

Correct Answer: Chemical equilibrium

Note: This Question is unanswered, help us to find answer for this one

24. What is a criterion for chemical equilibrium?

Answer

Correct Answer: Equation set equal to zero

Note: This Question is unanswered, help us to find answer for this one

25. How long does it take for the water in a cooling pond to transfer its heat to the air?

Answer

Correct Answer: 20 times

Note: This Question is unanswered, help us to find answer for this one

26. How many times the area of a spray pond is needed in a cooling pond?

Answer

Correct Answer: 20

Note: This Question is unanswered, help us to find answer for this one

27. What is the rate of heat removal from the refrigerated space by a refrigeration system?

Answer

Correct Answer: Cooling capacity

Note: This Question is unanswered, help us to find answer for this one

28. What type of nozzle first decreases and then increases?

Answer

Correct Answer: Converging-diverging

Note: This Question is unanswered, help us to find answer for this one

29. What are converging-diverging nozzles?

Answer

Correct Answer: Ducts in which the flow area first decreases and then increases in the direction of the flow

Note: This Question is unanswered, help us to find answer for this one

30. What is another name for ducts that change direction?

Answer

Correct Answer: Converging-diverging nozzles

Note: This Question is unanswered, help us to find answer for this one

31. What is the combined effects of conduction and fluid motion?

Answer

Correct Answer: Convection

Note: This Question is unanswered, help us to find answer for this one

32. What is the opposite of open system?

Answer

Correct Answer: Closed system

Note: This Question is unanswered, help us to find answer for this one

33. What other type of interaction could a control volume involve?

Answer

Correct Answer: Heat and work

Note: This Question is unanswered, help us to find answer for this one

34. What is the boundary of a control volume?

Answer

Correct Answer: Control surface

Note: This Question is unanswered, help us to find answer for this one

35. What can be the control surface of a control volume?

Answer

Correct Answer: Real or imaginary

Note: This Question is unanswered, help us to find answer for this one

36. What can be a control surface in a control volume?

Answer

Correct Answer: Imaginary

Note: This Question is unanswered, help us to find answer for this one

37. What is the name of the view that assumes properties to vary continually in space with no jump discontinuities?

Answer

Correct Answer: Continuum

Note: This Question is unanswered, help us to find answer for this one

38. What is an example of a point function in a continuum model?

Answer

Correct Answer: Properties

Note: This Question is unanswered, help us to find answer for this one

39. What type of mechanics is continuity equation used in?

Answer

Correct Answer: Fluid

Note: This Question is unanswered, help us to find answer for this one

40. In fluid mechanics, what is the conservation of mass equation known as?

Answer

Correct Answer: Continuity equation

Note: This Question is unanswered, help us to find answer for this one

41. What is not conserved in a chemical reaction?

Answer

Correct Answer: Total number of moles

Note: This Question is unanswered, help us to find answer for this one

42. What is the principle used to balance chemical reaction equations?

Answer

Correct Answer: Conservation of mass principle

Note: This Question is unanswered, help us to find answer for this one

43. Conservation of mass principle is the principle used to balance what?

Answer

Correct Answer: Chemical reaction equations

Note: This Question is unanswered, help us to find answer for this one

44. Conservation of net mass transfer is expressed as what?

Answer

Correct Answer: Net mass transfer to or from a system

Note: This Question is unanswered, help us to find answer for this one

45. What principle ensures that a system doesn't gain or lose mass during a process?

Answer

Correct Answer: Conservation of mass principle

Note: This Question is unanswered, help us to find answer for this one

46. What can only change forms?

Answer

Correct Answer: Energy

Note: This Question is unanswered, help us to find answer for this one

47. What does the word "conduction" mean?

Answer

Correct Answer: Transfer of energy

Note: This Question is unanswered, help us to find answer for this one

48. How does the transfer of energy from the more energetic particles of a substance to the adjacent less energetic ones happen?

Answer

Correct Answer: As a result of interaction between particles

Note: This Question is unanswered, help us to find answer for this one

49. What is the process of energy transfer from particles with more energy to particles with less energy?

Answer

Correct Answer: Conduction

Note: This Question is unanswered, help us to find answer for this one

50. What is the cooling medium used in a condenser?

Answer

Correct Answer: Lake, a river, or the atmosphere

Note: This Question is unanswered, help us to find answer for this one

51. What is a heat exchanger in which a vapour condenses to the saturated liquid state?

Answer

Correct Answer: Condenser

Note: This Question is unanswered, help us to find answer for this one

52. What does a condenser do?

Answer

Correct Answer: Rejects heat to the surroundings

Note: This Question is unanswered, help us to find answer for this one

53. What type of equipment is the condenser?

Answer

Correct Answer: Heat exchanger

Note: This Question is unanswered, help us to find answer for this one

54. What does the word compressor mean?

Answer

Correct Answer: Increases the pressure of a gas

Note: This Question is unanswered, help us to find answer for this one

55. What sort of device increases the pressure of a gas to very high pressures?

Answer

Correct Answer: Compressor

Note: This Question is unanswered, help us to find answer for this one

56. What is the maximum volume formed in a cylinder?

Answer

Correct Answer: Compression ratio r

Note: This Question is unanswered, help us to find answer for this one

57. What is the temperature at which a compression-ignition engine will combust?

Answer

Correct Answer: Self-ignition

Note: This Question is unanswered, help us to find answer for this one

58. What type of engines are CI engines?

Answer

Correct Answer: Reciprocating engines

Note: This Question is unanswered, help us to find answer for this one

59. What is the Compressibility Factor Z a correction factor for?

Answer

Correct Answer: Deviation from ideal-gas behaviour

Note: This Question is unanswered, help us to find answer for this one

60. What is the name of the deviation from ideal-gas behavior at a given temperature and pressure?

Answer

Correct Answer: Compressibility factor Z

Note: This Question is unanswered, help us to find answer for this one

61. What is a general approximation to compressed liquid in the absence of data?

Answer

Correct Answer: To treat compressed liquid as saturated liquid at the given temperature

Note: This Question is unanswered, help us to find answer for this one

62. What is the critical temperature for compressed liquid?

Answer

Correct Answer: Below

Note: This Question is unanswered, help us to find answer for this one

63. In what metric is a liquid with a pressure greater than the saturation pressure greater than the liquid with the pressure at its temperature?

Answer

Correct Answer: Compressed liquid

Note: This Question is unanswered, help us to find answer for this one

64. What does "compressed liquid" mean?

Answer

Correct Answer: Has a pressure greater than the saturation pressure

Note: This Question is unanswered, help us to find answer for this one

search