Thermodynamics MCQ
1. What is the difference between the work Wrev and the useful work Wu due to?
Answer
Correct Answer:
Irreversibility
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2. What are examples of irreversibilities?
Answer
Correct Answer:
Expansion, mixing of two gases
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3. What are the factors that cause a process to be irreversible?
Answer
Correct Answer:
Irreversibilities
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4. What is the temperature where a constant enthalpy line intersects the inversion line?
Answer
Correct Answer:
Inversion temperature
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5. What point in the T-P diagram is inversion line?
Answer
Correct Answer:
Zero slope
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6. What line passes through the points of zero slope on the T-P diagram?
Answer
Correct Answer:
Inversion line
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7. What is the term for an processes that has no irreversibilities that occur in the system during the process?
Answer
Correct Answer:
Internally reversible process
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8. During an internally reversible process, a system passes through a series of what?
Answer
Correct Answer:
Equilibrium states
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9. What does an internally reversible process have that an irreversible process doesn't?
Answer
Correct Answer:
No irreversibilities occurring within a system undergoing the process
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10. What is the total energy of a system?
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11. What is the sum of all forms of energy in a system?
Answer
Correct Answer:
Internal energy U
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12. What are engines where the energy is provided by burning a fuel within the system boundaries?
Answer
Correct Answer:
Combustion engines
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13. What are engines where the energy is provided by burning a fuel within the system boundaries called?
Answer
Correct Answer:
Internal combustion engines
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14. What property can be determined by summing the products of mass fractions and specific property?
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15. How can the enthalpy and entropy per unit mass of a gas mixture be determined?
Answer
Correct Answer:
Summing the products of the mass fractions and the specific property
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16. What property is not a function of system size?
Answer
Correct Answer:
Intensive properties
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17. What are two of the intense properties?
Answer
Correct Answer:
Temperature, pressure
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18. The intake valve is an inlet through which what is drawn into the cylinder?
Answer
Correct Answer:
Air or air-fuel mixture
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19. What is an example of a valve that draws the air or air-fuel mixture into the cylinder?
Answer
Correct Answer:
Intake valve
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20. What does inert gas mean in chemistry?
Answer
Correct Answer:
A gaseous component in a chemical reaction that does not react chemically with the other components
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21. What is a gaseous component in a chemical reaction that does not react chemically with the other components?
Answer
Correct Answer:
Inert gas
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22. What does inert gas not do to the other components?
Answer
Correct Answer:
React chemically
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23. What can be varied while a property is held constant?
Answer
Correct Answer:
Properties
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24. What type of property does Variation in one property does not carry over to the other property?
Answer
Correct Answer:
Independent properties
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25. What does the second law of thermodynamics state about entropy?
Answer
Correct Answer:
Increases
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26. What is the second law of thermodynamics?
Answer
Correct Answer:
Increase of entropy principle
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27. What has negligible variation with pressure?
Answer
Correct Answer:
Incompressible substances
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28. What does an inccompressible substance such as liquid or solid have?
Answer
Correct Answer:
Densities
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29. What do inelastic objects have negligible variation with?
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30. What does an incomplete combustion process result in having?
Answer
Correct Answer:
Combustion products
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31. Incomplete combustion is a process that contains any of which two items?
Answer
Correct Answer:
C, H2, CO, or OH
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32. What does the word "immediate" mean?
Answer
Correct Answer:
Surroundings
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33. What is the portion of the surroundings that is affected by the process?
Answer
Correct Answer:
Immediate surroundings
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34. What does the term ignition temperature mean?
Answer
Correct Answer:
Minimum temperature to which a fuel must be brought
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35. The minimum temperature to which a fuel must be brought to start the combustion is known as what?
Answer
Correct Answer:
Ignition temperature
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36. What is used to expand the refrigerant?
Answer
Correct Answer:
Throttling device
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37. What is the Ideal solution?
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38. What is an example of an ideal solution?
Answer
Correct Answer:
Ideal mixture
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39. What is a type of gas thermometer used to measure temperatures on the Ideal Gas Temperature Scale?
Answer
Correct Answer:
Constant-volume
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40. What does the name of the scale describe itself as being?
Answer
Correct Answer:
Ideal gas temperature scale
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41. What is the heat capacity of the ideal gas mixture?
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42. When using the Ideal-Gas equation of state, what does "Pv = RT" mean?
Answer
Correct Answer:
Predicts the P-v-T behaviour of a gas quite accurately
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43. What term indicates the relation between a gas and the volume it occupies?
Answer
Correct Answer:
Ideal-gas equation of state
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44. What does obeying the ideal-gas equation of state mean?
Answer
Correct Answer:
Ideal gas
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45. What does the term "ideal cycle" mean?
Answer
Correct Answer:
Actual cycle stripped of all the internal irreversibilities and complexities
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46. What is an actual cycle stripped of?
Answer
Correct Answer:
All the internal irreversibilities and complexities
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47. What is the term used to describe an actual cycle without all of the internal complexities?
Answer
Correct Answer:
Ideal cycle
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48. What kind of flow has a Mach number M >>1?
Answer
Correct Answer:
Hypersonic
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49. What is the Mach number at which subsonic flow is a Hypersonic flow?
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50. What is the term used to describe flow having a Mach number of 1 or more?
Answer
Correct Answer:
Hypersonic flow
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51. What type of fuel does coal contain?
Answer
Correct Answer:
Hydrocarbon fuels
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52. What are the two most common elements in hydrocarbon fuels?
Answer
Correct Answer:
Hydrogen and carbon
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53. What type of process does humidifying involve?
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54. What is the process of adding moisture to atmospheric air?
Answer
Correct Answer:
Humidifying
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55. Humidifying means adding what to atmospheric air?
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56. What is the H2O in the products in when HHV is used?
Answer
Correct Answer:
Liquid form
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57. What does HLV stand for?
Answer
Correct Answer:
Heating value
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58. What is the term used to describe the heating value of a fuel when the water in the combustion gases is completely condensed?
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59. The efficiency of furnaces are based on what?
Answer
Correct Answer:
Higher heating values
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60. What does the law say about the mole fraction of a weakly soluble gas in the liquid?
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61. What does the area under the process curve on a T-S diagram represent?
Answer
Correct Answer:
Heat transfer
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62. What does the area on the T-S diagram have no meaning for?
Answer
Correct Answer:
Irreversible processes
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63. What is a heat reservoir that supplies energy in the form of heat?
Answer
Correct Answer:
Heat source
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64. What does the heat source supply?
Answer
Correct Answer:
Energy in the form of heat
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Mining Engineering MCQs | Topic-wise
