OIL BURNER LICENSE EXAM AND PRACTICE EXAM NEWEST ACTUAL EXAM COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+

OIL BURNER LICENSE EXAM AND PRACTICE EXAM NEWEST ACTUAL EXAM COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+ .#2 fuel oil stored in outside above ground storage tanks in cold climates can cause: - ANSWER--Waxing -Higher CO2 levels -Soot .A "sealed and insulated chimney system" requires: - ANSWER-High static burner .A burner in a confined space using 1 GPH of #2 fuel oil requires what size permanent opening for combustion air? - ANSWER-140" .A common breach draft for an oil appliance is: - ANSWER--.03 to -.06 .A common over the fire draft for an oil appliances - ANSWER--.01 to -.02 .A common source of air leakage into the chimney is: - ANSWER-Loose fitting clean out door at base of chimney .A condition often overlooked on a call involving odors is: - ANSWER-Insufficient air in the boiler room .A fuel oil storage tank cannot be installed: - ANSWER-In the furnace room within 5 feet of the heating unit .A high CO2 reading is caused by.. - ANSWER-Incomplete combustion .A layer of soot 1/16" thick will increase fuel consumption by: - ANSWER-4% .A material with electrons so loose it allows voltage to pass with little or no resistance.. - ANSWER-Is a conductor .A method of dealing with low viscosity/cold temps with #2 oil? - ANSWER-Increase pump pressure/ decrease nozzle size .A one-pipe system: - ANSWER-Must NOT have the bypass plug inserted in the pump. .A properly set up and adjusted oil fire appliance should produce a CO2 measurement of: - ANSWER-10% to 12% .A pump in a one pipe system that is full of air can be self purged. - ANSWER-False .A reverse acting aquastat is used in a hydronic system to: - ANSWER-Stop the circulator when the water temperature falls below a preset temperature .A significant difference between the CO2 or O2 reading at the flue pipe and over the fire is indication of: - ANSWER-Air leakage in the boiler .A simple, effective, yet inexpensive way to increase on-cycle system efficiency is to: - ANSWER-Match the nozzle to the heating load .A single stationary conductor in the flux of a permanent magnet will: - ANSWER--NOT induce a current flow in the conductor -NOT reverse the current flow in the conductor -NOT increase the amperage in the conductor .A stack switch is no longer allowed to be installed or replaced because.. - ANSWER-It's safety cutout time is higher than what is now required. .A stack thermometer commonly has a range from: - ANSWER-200° to 1000° .A steam pigtail should always be installed between the pressuretrol and the boiler to: - ANSWER-Place a water seal between the boiler and the pressuretrol .A technician is servicing an oil fired appliance that uses a cad cell primary control. The control locks out after a brief period of time. Which of the following can cause this to happen? - ANSWER-The cad cell does not sense light. .A typical ignition transformer is of what type? - ANSWER-Step-up .A typical residential zone valve for a hot water heating system normally operates on: - ANSWER-24 volts .A zero smoke and low CO2 or high O2 reading could be caused by: - ANSWER-Too much excess air .According to NFPA 31-2001, what is the minimum size of the fill pipe on an oil storage tank? - ANSWER-1 1/4" .Air is composed of oxygen and nitrogen in what percentages? - ANSWER-21 and 79 .An acceptable smoke test reading for new modern equipment is: - ANSWER-Between #0 and #1 .An advantage of power venting is: - ANSWER--Installing an oil fired unit where there is no chimney -More positive control of draft -Lower cost of new homes .An electrical switch that proves proper draft has been established is called what? - ANSWER-Air proving switch .An often overlooked cause of a high CO2 reading is.. - ANSWER-Not enough combustion air in the equipment room. .Atomizing type burners were designed to burn which type of fuel? - ANSWER-#2 oil .Because burner fans have beveled blades any dirt or lint in the blade will: - ANSWER-Reduce the amount of air for combustion .Because of the cad cell eye's limited sensing range, it can only be used effectively to: - ANSWER-Monitor an oil flame .Before installing a new nozzle the service technician should: - ANSWER-Flush out the nozzle line and adapter .Before lowering the temperature of a hot water boiler, consideration must be given to the: - ANSWER-Design of the heating system .Breaking up oil into small droplets is called: - ANSWER-Atomization .Burner air fans are manufactured to very close tolerances because an unbalanced fan can: - ANSWER--Put a strain on motor bearings -Create vibrations .Burner ignition systems normally operate at what primary voltage? - ANSWER-120 V .Burner ignition transformers operate at what secondary voltage range? - ANSWER-10,000 to 14,000 V