What is the minimum furnace size for which the fire department should be called to be on standby before lighting the burner when the refractory has been soaked with oil?
A) 2.5 gph B) 1.5 gph C) 4.5 gph D) 3.5 gph
[Ques. 2] A TAB technician determines that the total airflow entering the return grilles is much lower than the amount of air the blower is moving. This indicates that:
A) There is too much restriction in the return-side ductwork.
B) There are leaks in the supply-side ductwork.
C) There is too much restriction in the supply-side ductwork.
D) There are leaks in the return-side ductwork.
[Ques. 3] When the liquid line is restricted, the supply of refrigerant to the metering device is reduced. What is the effect on suction pressure and superheat?
A) Suction is increased and superheat increased.
B) Suction pressure goes down and superheat increases.
C) No change in the suction pressure
D) Suction is decreased and superheat decreased.
[Ques. 4] Where should air vents be located in a hot water heating system?
A) Entering the circulator pump
B) Air vents need to be placed at high points of the system and on terminal units.
C) Leaving the circulator pump
D) Air vents need to be placed at low points of the system and on terminal units.
[Ques. 5] Which of the following is a practical use of a solar system?
A) Use a solar collector to control the flow of water entering the heat pump.
B) Use a solar system to operate a heat pump during winter.
C) Use a solar collector to raise the temperature of water entering the heat pump.
D) Use a solar system in lieu of a heat pump for heating during winter.
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