Refrigeration & Air Conditioning MCQ
1. What is the process called when a substance is cooled by the use of an indoor coil?
Answer
Correct Answer:
Evaporator
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2. What is this device sometimes called?
Answer
Correct Answer:
Air handler or a furnace and coil
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3. What is the device that contains the indoor coil, fan, motor and filtering device?
Answer
Correct Answer:
Indoor Unit
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4. What is the main function of the HVAC system?
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5. What is the collective term for HVAC?
Answer
Correct Answer:
Heating, Ventilation, and Air Conditioning
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6. A device designed to regulate what?
Answer
Correct Answer:
Humidity input
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7. What type of device regulates humidity?
Answer
Correct Answer:
Humidistat
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8. What do humidification processes add moisture to?
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9. What process is involved when humidification is taking place?
Answer
Correct Answer:
The process of adding moisture to the air
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10. Humidification is the process of adding what to the air within a space?
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11. What is the total heating output of a heat pump during its normal usage period for heating?
Answer
Correct Answer:
British Thermal Units
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12. What is the output of a heat pump in British Thermal Units during its normal usage period for heating?
Answer
Correct Answer:
Heating Seasonal Performance Factor
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13. What is a Horizontal Furnace?
Answer
Correct Answer:
A furnace that lies on its side
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14. A BTUh is equal to how many?
Answer
Correct Answer:
British Thermal Units per hour
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15. What do heat transfer movements usually involve?
Answer
Correct Answer:
Between two substances
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16. What does the air outside the home serve as for a heat pump?
Answer
Correct Answer:
Heat source
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17. What is the most common method of heat rejection?
Answer
Correct Answer:
Air cooled
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18. Which three methods for heat rejection are the most common?
Answer
Correct Answer:
Air cooled, water cooled and glycol cooled
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19. What type of Pump uses a valve to alternate between heating and cooling?
Answer
Correct Answer:
Air Conditioner
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20. What type of air conditioner doesn't continually blow air?
Answer
Correct Answer:
Heat Pump
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21. What type of air conditioner is able to alternate between heating and cooling?
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22. What was the total BTU's for the space to be conditioned?
Answer
Correct Answer:
The amount of heat lost
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23. What is the outdoor design temperature used in the calculation of heat gain from a space to be conditioned?
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24. What does a heat exchanger do?
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25. What type of energy does the source of the water use?
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26. What is the primary purpose of a well?
Answer
Correct Answer:
Water from a well to be used for heat transfer
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27. Water from a well to be used for what?
Answer
Correct Answer:
Heat transfer
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28. What's another name for water from a well to be used for heat transfer?
Answer
Correct Answer:
Ground Water-Source
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29. What are some examples of Glycol-Cooled Systems?
Answer
Correct Answer:
A type of air conditioning system that uses a water/glycol solution for transferring heat
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30. What type of air conditioning system uses water and glycol?
Answer
Correct Answer:
Glycol-Cooled System
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31. What does a furnace make?
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32. What part of a HVAC system uses gas, oil, electricity, or other fuels for combustion?
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33. What are the chemicals in a Freon?
Answer
Correct Answer:
Fluorine, chlorine or bromine
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34. What type of contaminents are removed by air filters?
Answer
Correct Answer:
Dust, particles, and contaminents
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35. What is the term for protecting HVAC equipment?
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36. What are the fins attached to the evaporator called?
Answer
Correct Answer:
Heat sink fins
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37. What does the evaporator absorb?
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38. What is the British Thermal Unit per hour measure of efficiency?
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39. What does EER stand for?
Answer
Correct Answer:
Energy Efficiency Ratio
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40. Heat can be supplemental or auxiliary for what?
Answer
Correct Answer:
Second stage heat
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41. What type of contaminants does the electronic air cleaner filter out?
Answer
Correct Answer:
Large particles and contaminants
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42. What does a Economist do?
Answer
Correct Answer:
Controls a damper to allow outside air to enter the return air system
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43. What does the Economist do in systems that need to reduce costs?
Answer
Correct Answer:
Controls a damper
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44. What is the term used to describe the electronic systems that power ECMs?
Answer
Correct Answer:
Electronic commutation systems
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45. What is a common type of Direct Expansion meter?
Answer
Correct Answer:
Electronic expansion valve
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46. What is an example of an electronic expansion valve?
Answer
Correct Answer:
Thermostatic
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47. What is a duct used for?
Answer
Correct Answer:
Transfering air to and from an air handling unit
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48. What is used to transfer air to and from an air handling unit?
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49. What type of furnace has the air flow from the top to the bottom?
Answer
Correct Answer:
Downflow Furnace
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50. In what direction does the air flow through a Downflow Furnace?
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51. What does "downflow" refer to?
Answer
Correct Answer:
A type of HVAC system
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52. What kind of HVAC system discharges air downward?
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53. What type of air is pulled into the furnace by the vent?
Answer
Correct Answer:
Outside air
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54. How does dehumidification work?
Answer
Correct Answer:
The reduction of water vapor in air by cooling the air below the dew point
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55. What does dehumidification reduce water vapor in air by?
Answer
Correct Answer:
Cooling the air
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56. What kind of buildup is removed during the defrost cycle?
Answer
Correct Answer:
Ice or frost
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57. What are two things that can build up on an outdoor heat pump coil?
Answer
Correct Answer:
Ice or frost buildup
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58. What are used in zoning to regulate airflow to certain rooms?
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59. What did the cooling load calculation method first appear in?
Answer
Correct Answer:
1979 ASHRAE Cooling and Heating Load Manual
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60. What is the total heat gains through a building for the purposes of sizing HVAC equipment?
Answer
Correct Answer:
Cooling Load
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61. In what year was the Cooling and Heating Load Manual published?
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62. How many BTU’s are in a ton?
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63. What is the measure of the ability of a unit to remove and transfer heat?
Answer
Correct Answer:
Cooling Capacity
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64. What part of a split system contains the outdoor compressor and the condenser coil?
Answer
Correct Answer:
Condensing Unit
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65. What controls are typically included in the condensing unit?
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66. What does a condenser do?
Answer
Correct Answer:
Transfers and rejects heat
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67. What is used to pump refrigerant from a condensing unit through an evaporator coil?
Answer
Correct Answer:
Compressor
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68. Comfort Air Conditioning systems are designed for the comfort of people, not the protection of what?
Answer
Correct Answer:
Computer-based electrical systems
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69. Comfort air conditioning systems are designed for the comfort of what?
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70. What is the air conditioning system type that doesn't contain refrigerant?
Answer
Correct Answer:
Chilled Water System
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71. How many charge of refrigerant are needed for proper system operation?
Answer
Correct Answer:
The quantity of refrigerant required for proper system operation
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72. What term is used to describe the amount of refrigerant in a system?
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73. What is the abbreviation for cubic feet per minute?
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74. What does CFM stand for?
Answer
Correct Answer:
Cubic Feet per Minute
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75. In what type of compressor is the refrigerant drawn into the device axially?
Answer
Correct Answer:
Centrifugal Compressor
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76. What is the device that rotates in the Centrifugal Compressor?
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77. What does the term central air conditioning system mean?
Answer
Correct Answer:
System in which air is treated at a central location
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78. What is the color of carbon monoxide?
Answer
Correct Answer:
Colorless
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79. What is Carbon Monoxide a product of?
Answer
Correct Answer:
Burning any fuel
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80. How can the capacity of a system be expressed?
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81. A heating or cooling system's capacity can be measured in what?
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82. What is the ability of a heating or cooling system to heat or cool a given amount of space?
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83. What is the amount of heat required to raise one pound of water one degree fahrenheit per hour?
Answer
Correct Answer:
The abbreviation for British thermal units per hour
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84. The amount of heat required to raise one pound of water one degree what is the common measure of heat transfer rate?
Answer
Correct Answer:
Fahrenheit per hour
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85. What is the rate at which water rises when exposed to heat?
Answer
Correct Answer:
One degree fahrenheit per hour
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86. What is the name of the standard used to measure the amount of heat required to raise the temperature of a pound of water?
Answer
Correct Answer:
British Thermal Unit
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87. How many BTU in an hour?
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88. What does "blower" mean?
Answer
Correct Answer:
An air handling device for moving air through a HVAC system
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89. What type of system moves the air through the building?
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90. What type of air handling device moves air?
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91. What does the term Auto Changeover mean?
Answer
Correct Answer:
A control or thermostat that provides for automatic switching of an air conditioning system from heating to cooling
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92. What does a control or thermostat provide for?
Answer
Correct Answer:
Automatic switching of an air conditioning system
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93. What is the name of the organization that sets standards for testing and rating heat pumps and air conditioners?
Answer
Correct Answer:
Air Conditioning And Refrigeration Institute
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94. What is the A rating that denotes the efficiency of gas heating equipment?
Answer
Correct Answer:
Annual Fuel Utilization Efficiency
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95. What is the part of the central air system that moves heated or cooled air throughout the systems ductwork?
Answer
Correct Answer:
Air Handler
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96. What is the movement of air through an Air Conditioning System and the through space to be conditioned?
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97. What are an air diffusers primary functions?
Answer
Correct Answer:
To control the pattern of the airflow into an assigned space
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98. What components are used to direct airflow into an assigned space?
Answer
Correct Answer:
Air diffusers
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99. What cooling method takes advantage of the fact that an object with more surface area has more heat dissipation potential?
Answer
Correct Answer:
Air cooling
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100. What kind of equipment is an Air Conditioner?
Answer
Correct Answer:
Mechanical equipment
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101. What can accumulate if fresh air isn't exchanged?
Answer
Correct Answer:
Excessive gases and toxic chemicals or residues
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102. What do we need to live?
Answer
Correct Answer:
Fresh air
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Agricultural Engineering MCQs | Topic-wise
