The BACnet protocol is primarily used in:
A) Commercial refrigeration systems. B) Small appliances.
C) Building automation control. D) Residential systems.
[Ques. 2] Two-stage furnaces require:
A) Two draft pressure switches.
B) A two-stage thermostat.
C) A two-stage gas valve.
D) A two-stage thermostat, a two-stage gas valve, a two-speed inducer fan, and two draft pressure switches.
[Ques. 3] A refrigeration cycle dehumidifier is similar to:
A) A commercial freezer with an automatic defrost cycle.
B) An evaporative air conditioner.
C) A gas-fired furnace with an integrated compressor.
D) A window unit with a single airflow over both the evaporator and condenser.
[Ques. 4] Which of the following is the correct order of the flow in the heating cycle of an air-source heat pump?
A) Reversing valve, indoor coil, outdoor coil, outdoor TEV, compressor
B) Compressor, reversing valve, outdoor coil, indoor TEV, indoor coil, reversing valve
C) Compressor, reversing valve, indoor coil, outdoor TEV, outdoor coil, reversing valve
D) Indoor TEV, indoor coil, reversing valve, compressor, reversing valve, outdoor coil
[Ques. 5] How is the limit wired on a furnace that uses a line voltage limit?
A) The limit is wired in series with the gas valve.
B) The limit is wired in series with the indoor fan motor.
C) The limit is wired in series with the transformer secondary.
D) The limit is wired in series with the transformer primary.
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