The purpose of a fire damper is to:
A) Prevent the spread of smoke and fire throughout the building.
B) Regulate the draft in a fuel burning appliance.
C) Provide a path for the smoke to exit the building in the event of a fire.
D) Regulate the amount of combustion air to a fuel-burning appliance.
[Ques. 2] When troubleshooting single-phase compressor motors, it is important that the technician:
A) Check for phase reversal between L1 and L2.
B) Measure the phase displacement between the two power legs.
C) Check the frequency of the power source.
D) Check the start relay, start capacitor, and run capacitor.
[Ques. 3] How is a compressor's rated load amp rating, RLA, determined?
A) It is the compressor's maximum continuous current rating divided by 1.56.
B) It is the average of the operating current across all operating conditions for which the system is designed.
C) It is the maximum current that the compressor should draw.
D) It is the current draw at the compressor's capacity rating point.
[Ques. 4] Which of the following is responsible for shifting the position of the sliding cylinder of the reversing valve?
A) Pressure B) Gravity C) Refrigerant D) Condensation
[Ques. 5] How is a gas meter used to check gas furnace input?
A) The gas level is checked before and after firing the furnace, and the firing rate is calculated based on the heating value of the gas and the amount of gas used.
B) The number of times the gas dial rotates in a minute and the gas heating capacity are used to calculate the firing rate.
C) The firing rate indicator on the gas meter calculates the firing rate based on gas consumption.
D) The meter is zeroed, the furnace is operated, and the meter is sent to the furnace manufacturer for analysis.
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