Title: Unit 10 Quiz
Course: HAC 241 -Building Systems and Performance Spring 2015 > Section: HAC 241 -Building Systems and Performance Spring 2015

Q: The purpose of a heating clean and tune is
- a. Restore the furnace back to factory operating specs
- b. increase the effieciency of the furnace
- c. Check for safe operation of the furnace
- d. All of the above
A: d. All of the above

Q: The contractor checklist should be completed
- a. When there is a furnace change-out
- b. When there is a boiler change-out
- c. When there is a clean and tune done on the furnace
- d. All of the above require a contractor checklist
A: d. All of the above require a contractor checklist

Q: The best method to confirm the presence of a cracked heat exchanger
- a. Smoke bomb test
- b. Visual Test
- c. Testing supply air for CO
- d. Dye penetrants test
A: b. Visual Test

Q: The presence of corrosion on a metal vent pipe could indicate
- a. The vent gasses are too hot
- b. The air filter is dirty
- c. Overfiring by the burners
- d. Condensation in the vent system is occuring
A: d. Condensation in the vent system is occuring

Q: When testing temperature rise in a furnace the technician measures 120 degrees, 130 degrees, and 140 degrees on the supply side and 75 degrees on the return side.  What is the temperature rise?
- a. 55 degrees
- b. 45 degrees
- c. 65 degrees
- d. 50 degrees
A: a. 55 degrees

Q: The most likely cause of a high tempearture rise is
- a. Excess air flow across the heat exchanger
- b. Lack of air flow across the heat exchanger
- c. Under-firing of the burners
- d. Low gas pressure
A: b. Lack of air flow across the heat exchanger

Q: The most likely cause of a low temperature rise is
- a. Excess air flow across the heat exchanger
- b. Lack of air flow across the heat exchanger
- c. Over-firing of the burners
- d. High gas pressure
A: a. Excess air flow across the heat exchanger

Q: Dirty blower wheels will cause low temperature rise
- a. true
- b. false
A: b. false

Q: Cleaning the heat exchanger and burners is part of the clean and tune
- a. true
- b. false
A: a. true

Q: Most burners are clean and do not need to be cleaned during the clean and tune procedure
- a. true
- b. false
A: b. false