Air Conditioning and Heat Pumps Inspection Section#1 Air Conditioning Quiz#1

• Question 1

  Needs Grading

  	Define in one sentence, sensible heat.
  	Selected Answer: Sensible heat is the heat that a thermostat senses.  Correct Answer:   Sensible heat is sensed by a thermostat; when the temperature changes, sensible heat changes. Response Feedback: [None Given]

• Question 2

  Needs Grading

  	Define, in one sentence, latent heat.
  	Selected Answer: Latent heat involves adding or removing heat without changing temperature. Correct Answer:   Latent heat occurs when heat is added or taken away wihtout a change in temperature, such as when boiling water changes to steam. Response Feedback: [None Given]

• Question 3

  Needs Grading

  	Explain in two or three sentences how people's bodies are cooled by evaporative cooling.
  	Selected Answer: The human body cools itself by sweating. When moisture evaporates off the surface of the skin, there is a great deal of cooling that takes place.  Correct Answer: Evaporative cooling removes moisture from people's bodies, which also removes heat. As moisture evaporates, the air immediately adjacent to the skin is saturated. Blowing the saturated air away allows more moisture to evaporate from our skin, making us feel more comfortable. Response Feedback: [None Given]

• Question 4

  Needs Grading

  	Explain in two sentences how air conditioners dehumidify houses.
  	Selected Answer: As the air outside the coil gives off heat, it also loses its ability to hold moisture. Condensation forms on the outside of the evaporator coil. The air gives up its moisture as it passes over the coil.  Correct Answer: As the warm air passes over the evaporator coil, it cools and loses its ability to carry moisture. That moisture is collected on the coil, making the cooler air dryer. Response Feedback: [None Given]

• Question 5

  Needs Grading

  	How many BTUs are required to convert one pound of water at 212 degrees F to steam at 212 degrees F?
  	Selected Answer: 970BTU Correct Answer:   970 BTUs Response Feedback: [None Given]

• Question 6

  Needs Grading

  	In what state is Freon when it is in the suction line?
  	Selected Answer: Gas Correct Answer:   Gas - low temperature and pressure. Response Feedback: [None Given]

• Question 7

  Needs Grading

  	What is the most common energy source for central air conditioning?
  	Selected Answer: Electricity Correct Answer:   Electricity - 240 volts. Response Feedback: [None Given]

• Question 8

  Needs Grading

  	What is the temperature (in degrees F) of Freon when it leaves the evaporator coil?
  	Selected Answer: 50F Correct Answer:   50 degrees F Response Feedback: [None Given]

• Question 9

  Needs Grading

  	What is the temperature of Freon as it enters the compressor?
  	Selected Answer: 50F Correct Answer:   50 degrees F Response Feedback: [None Given]

• Question 10

  Needs Grading

  	What is the temperature of Freon as it enters the evaporator coil?
  	Selected Answer: 20F Correct Answer:   20 to 40 degrees F Response Feedback: [None Given]

• Question 11

  Needs Grading

  	What is the temperature of Freon when it enters the condenser coil?
  	Selected Answer: 150F Correct Answer:   170 to 230 degrees F Response Feedback: [None Given]

• Question 12

  Needs Grading

  	What is the temperature of Freon when it enters the expansion device?
  	Selected Answer: 100F Correct Answer:   100 degrees F Response Feedback: [None Given]

• Question 13

  Needs Grading

  	What is the temperature of Freon when it leaves the compressor?
  	Selected Answer: 150F Correct Answer:   170 to 230 degrees F Response Feedback: [None Given]

• Question 14

  Needs Grading

  	What is the temperature of Freon when it leaves the condenser coil?
  	Selected Answer: 100F Correct Answer:   100 degrees F Response Feedback: [None Given]

• Question 15

  Needs Grading

  	What is the temperature of Freon when it leaves the expansion device?
  	Selected Answer: 20F Correct Answer:   20 to 40 degrees F Response Feedback: [None Given]

• Question 16

  Needs Grading

  	When the system is operating, which of the refrigerant lines will feel cool?
  	Selected Answer: suction line (larger tube) Correct Answer:   Suction line. Response Feedback: [None Given]

• Question 17

  Needs Grading

  	When the system is operating, which of the refrigerant lines will feel warm?
  	Selected Answer: liquid line Correct Answer:   Liquid line. Response Feedback: [None Given]

• Question 18

  Needs Grading

  	Where is condensate collected in an air condtioning system?
  	Selected Answer: The moisture that forms on the coil is collected in a pan below the coil. The water is drained from the pan through a condensate tube to a floor drain or sink, to the outside or some other acceptable discharge point.  Correct Answer:   Condensate is collected in a pan under the evaporator coil, and drained to a tube that runs to the floor drain, for example. Response Feedback: [None Given]

• Question 19

  Needs Grading

  	Which of the Freon lines is insulated?
  	Selected Answer: suction line Correct Answer:   The suction line. Response Feedback: [None Given]

• Question 20

  Needs Grading

  	Which side of the air conditioning loop is the high pressure side?
  	Selected Answer: outside Correct Answer:   It runs from the compressor discharge through the condenser to the expansion device inlet. Response Feedback: [None Given]

• Question 21

  Needs Grading

  	Which side of the air conditioning loop is the low pressure side?
  	Selected Answer: inside Correct Answer:   It runs from the expansion device outlet through the evaporator to the compressor inlet. Response Feedback: [None Given]

• Question 22

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  	An inspection done to the Standards requires us to look at the... (Note, there are 2 correct answers.)
  	Selected Answers:   cooling and air handling equipment   normal operating controls Answers:   cooling and air handling equipment   normal operating controls window air conditioners uniformity of cool air supply performance of the system in any weather Response Feedback: Good work!

• Question 23

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  	Central air conditioners are most like which household appliance?
  	Selected Answer:   a refrigerator Answers: a stove   a refrigerator a microwave a trash compactor a garbage disposal Response Feedback: Good work!

• Question 24

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  	In what state is Freon in the compressor?
  	Selected Answer:   gas Answers: solid   gas liquid none of the above Response Feedback: Well done!!

• Question 25

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  	In what state is Freon in the expansion device?
  	Selected Answer:   liquid Answers: solid gas   liquid none of the above Response Feedback: Well done!!

• Question 26

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  	If the air conditioning system has been shut down, then we have to activate it to test it.
  	Selected Answer:  False Answers: True  False Response Feedback: Good work!

• Question 27

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  	The evaporator coil is outdoors in a split system.
  	Selected Answer:  False Answers: True  False Response Feedback: Well done!!

• Question 28

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  	To test the air conditioning system, we have to operate the thermostat.
  	Selected Answer:  True Answers:  True False Response Feedback: Good work!

• Question 29

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  	We have to check filters in the air handling system.
  	Selected Answer:  False Answers:  True False Response Feedback: That's not correct.

• Question 30

  0 out of 0 points

  	We have to report on the presence of a cool air supply to each room.
  	Selected Answer:  False Answers: True  False Response Feedback: Good work!

• Question 31

  0 out of 0 points

  	When you compress gas, you cool it.
  	Selected Answer:  False Answers: True  False Response Feedback: Well done!!