Oil Burner License Exam Questions and Answers A+ Pass

What is the first thing a tech should do when arriving at a no combustion call? - ANSWER-Ask how many times the customer reset the unit. What is the best long term solution for preventing a clogged nozzle? - ANSWER--Remove any underground storage tanks. -Install a quality oil filter. -Cut the suction line 10" above the tank outlet to prevent sludge. Hot water and steam valves are interchangeable. - ANSWER-False When in the presence of a flame, a cad cell normally reads.. - ANSWER-300-1000 ohms If a pump is used to bring oil to a level higher than the tank, an oil safety valve is required. - ANSWER-True On a call where a hydronic heat system is putting out too much heat on the stack, the issue may be.. - ANSWER--Too much draft. -Not enough combustion air in the equipment room. -Air leakage into chamber. A high CO2 reading is caused by.. - ANSWER-Incomplete combustion An often overlooked cause of a high CO2 reading is.. - ANSWER-Not enough combustion air in the equipment room. When multiple pumps are wired together in a heating system, they should be wired in.. - ANSWER-parallel In a series circuit.. - ANSWER-Current has one path. When 2 burners are connected to the same chimney.. - ANSWER-Sufficient draft must be obtained to operate both units. The ignition transformer is located.. - ANSWER-In the primary control.