Title: Unit 8 Quiz
Course: HAC 241 -Building Systems and Performance Spring 2015 > Section: HAC 241 -Building Systems and Performance Spring 2015

Q: Which of the following are NOT part of a cooling clean and tune for no additional charge
- A. Correcting the refrigerant charge
- B. Cleaning the evaporator coil
- C. Cleaning the condenser coil
- D. Cleaning the indoor blower wheel
A: A. Correcting the refrigerant charge

Q: Most often the air flow in most residential split A/C systems:
- A. Most systems have too much air flow
- B. Most systems have about the right amount of airflow
- C. Most systems are starved for adequate air flow
- D. Air flow is not important in split A/C systems
A: C. Most systems are starved for adequate air flow

Q: Inspecting the electrical system of a condenser is done to look for hot spots in the wiring and components
- A. True
- B. False
A: A. True

Q: The most common method for charging an A/C system that uses an orifice or cap tube metering device is:
- A. Super Heat Method
- B. Subcooling Method
- C. Frost Back Method
- D. Add 30 degrees to ambient temperature
A: B. Subcooling Method

Q: The most common method for charging an A/C system that uses a TXV is:
- A. Super Heat Method
- B. Subcooling Method
- C. Frost Back Method
- D. Add 30 degrees to ambient temperature
A: B. Subcooling Method

Q: If the measured super heat is 8 degrees below(low super heat) the expected chart value the technician should:
- A. Add refrigerant
- B. Remove refrigerant
- C. Leave the charge as is
- D. None of the above
A: B. Remove refrigerant

Q: If the measured super heat is 8 degrees above(high super heat) the expected chart value the technician should:
- A. Add refrigerant
- B. Remove refrigerant
- C. Leave the charge as is
- D. None of the above
A: A. Add refrigerant

Q: If the suction line pressure on R-22 system is 70 PSIG and suction line temp is 50 degrees the super heat is:
- A. 5 Degrees
- B. 9 Degrees
- C. 20 Degrees
- D. 25 Degrees
A: B. 9 Degrees

Q: To increase the subcooling on a typical TXV cooling system you should
- A. Add refrigerant
- B. Remove refrigerant
- C. Leave the charge as is
- D. None of the above
A: A. Add refrigerant

Q: To decrease the subcooling on a typical TXV cooling system you should
- A. Add refrigerant
- B. Remove refrigerant
- C. Leave the charge as is
- D. None of the above
A: B. Remove refrigerant

Q: Heat pumps produce heat by:
- A. Running electric heating elements
- B. Transporting heat from outside the house to inside the house
- C. Burning fossil fuels to create heat
- D. Reversing the flow of current in the compressor
A: B. Transporting heat from outside the house to inside the house

Q: The most common source of auxiliary or backup heat in heat pumps is:
- A. Natural Gas
- B. Oil
- C. Electric Elements
- D. Wood Stoves
A: C. Electric Elements

Q: The balance point of a heat pump system is
- A. Heat pump output equals to heat loss of the structure
- B.Ratio of heat output to energy output
- C. Occurs at minus 10 degrees F
- D. Occurs at 50 degrees F.
A: A. Heat pump output equals to heat loss of the structure

Q: The COP(coefficient of performance) of a heat pump system is:
- A. Heat pump output equals to heat loss of the structure
- B.Ratio of heat output to energy output
- C. Occurs at minus 10 degrees F
- D. Occurs at 50 degrees F.
A: B.Ratio of heat output to energy output

Q: Heat pumps are all electric systems
- True
- False
A: True

Q: Geothermal heat pump systems will be common in weatherization housing stock.
- False
- True
A: False