Air that is mixed with the fuel before it is ignited is referred to as:

Air that is mixed with the fuel before it is ignited is referred to as:
 
  A) Ignition air. B) Combustion air. C) Secondary air. D) Primary air.

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[Ques. 2] How can you determine the amount of airflow in a heat pump?
 
  A) Compare rate of airflow against external static pressure.
  B) Operate the blower and read the external temperature.
  C) Measure air temperature, amperage, and voltage, and calculate the airflow.
  D) Align the thermometer with the heat strips and note the temperature.

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[Ques. 3] The ductwork connections for a rooftop packaged unit are typically:
 
  A) On the top of the unit.
  B) On the side of the unit.
  C) On the bottom of the unit.
  D) Not used because they do not connect to ductwork.

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[Ques. 4] What is an acceptable amount of drift?
 
  A) 0.5 to 0.6 percent B) 0.1 to 0.3 percent C) 1 to 3 percent D) 2 to 5 percent

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[Ques. 5] Which of the following is a step in checking a system's defrost cycle?
 
  A) Turn off the pressure switch.
  B) Set the defrost thermostat to a higher temperature.
  C) Short the test pins together.
  D) Clear the area around the outdoor coil.