The flow rate that oil is fed to the burner is rated in __________.
A. gallons per hour
B. gallons per minute
C. ounces per hour
D. ounces per minute
Answer: A
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When a J1939 bus experiences a dead short to the power side of the circuit, what is the likely outcome?
A. shuts down the node closest to the short B. no impact on bus communications C. messages transmit with increased noise D. shuts down all bus communications
When during troubleshooting should the wiring diagram be referenced?
A) before checking the power supply B) before touching the unit C) after grounding the pilot burner D) after checking the thermostat
When troubleshooting a hydronic heating system, the technician notices that the circulator pump is running and the burner is firing, but no hot water is flowing through the system. What is the most likely problem?
A. defective circulator pump B. defective room thermostat C. air in the system D. high limit open
DWV copper stands for drain, waste and vent and is also a lightweight copper not typically used in the HVAC/R industry as far as refrigerant-carrying applications are concerned.
Answer the following statement true (T) or false (F)