Download Oil Burner Systems: 350 Q&A for Troubleshooting and Maintenance and more Exams Oil Engineering in PDF only on Docsity!
2025 ACTUAL EXAM TEST BANK 350
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
To reduce combustion problems caused by cold oil - CORRECT ANSWER✔✔ Increase the pump pressure, install a nozzle line pre-heater, and use additives or kerosene to lower viscosity Nozzle after trip can be caused by - CORRECT ANSWER✔✔ a defective pressure regulating valve, air in the nozzle line, and oil expansion in the nozzle after shut down The flow rate stamped on the nozzle is based on: - CORRECT ANSWER✔✔ 100 PSI A proper combustion chamber: - CORRECT ANSWER✔✔ Is large enough so the fire doesn't touch (impinge on) any surface, The cross connection between two supply tanks shall not exceed? - CORRECT ANSWER✔✔ 660 gallons
When is an automatic draft control not required? - CORRECT ANSWER✔✔ When the equipment is designed to control the draft. Combustion performance testing can indicate: - CORRECT ANSWER✔✔ Improper air oil mixture, too much combustion air, and low pump pressure. If a second oil-burning appliance is installed in a single chimney, you must insure: - CORRECT ANSWER✔✔ Sufficient draft is available for safe operation of all connected equipment. Delayed ignition can be caused by: - CORRECT ANSWER✔✔ Weak ignition transformer You should replace the oil burner nozzle with: - CORRECT ANSWER✔✔ The manufacturers recommended nozzle spray pattern and spray angle. Viscosity problems can be corrected by: - CORRECT ANSWER✔✔ Decreasing the nozzle size and increasing the pump pressure accordingly
Low boiler water temperature in a hydronic hot water system may be caused by? - CORRECT ANSWER✔✔ Undersized oil burner nozzles Delayed opening oil valves are used to? - CORRECT ANSWER✔✔ Allow oil pump to come up to speed If a steam boiler is to be installed with an automatic feeder it must also have: - CORRECT ANSWER✔✔ A backflow prevention device How can a damaged heat exchanger be detected on a forced warm air system? - CORRECT ANSWER✔✔ With a smoke trace candle If a high limit is installed to prevent high boiler water temperature, what is the function of the low limit? - CORRECT ANSWER✔✔ To maintain temperature for domestic hot water On a steam system, a plugged siphon loop can have what affect on the heating system? - CORRECT ANSWER✔✔ Insufficient heat in the living space
On a triple acting aquastat a minimum of 20 degrees is recommend between the high and low limit, this will prevent? - CORRECT ANSWER✔✔ The boiler going off on high limit before reaching the minimum circulator temperature An advantage of flame retention burner is - CORRECT ANSWER✔✔ Their high static pressure enables boilers and furnaces with tighter more efficient heat exchange passages The key final adjustment for most oil burners is - CORRECT ANSWER✔✔ Combustion air Dirt or lint buildup in the bevel of the burner fan blades will - CORRECT ANSWER✔✔ Reduce the amount of combustion air To change the air ratio for different firing rates with an adjustable head burner you - CORRECT ANSWER✔✔ Adjust the position of the drawer assembly in the Air tube All petroleum products are chemical compounds of - CORRECT ANSWER✔✔ Hydrogen and carbon
The home for bacterial growth and sludge in the bottom of the oil tank is - CORRECT ANSWER✔✔ Water To ensure clean, uncontaminated fuel reaches the oil burner you must - CORRECT ANSWER✔✔ Install tanks properly, regularly inspect and fix minor defects before they lead to major problems, and install a quality oil filter Water in oil tanks come from - CORRECT ANSWER✔✔ Condensation, loose or missing fill and vent caps, and failing to drain water from a tank before installation When installing an oil tank be sure: - CORRECT ANSWER✔✔ The fill and vent lines are pitched towards the tank, to install a vent alarm and a tank gauge, and to install an oil filter Oil lines buried in concrete should be - CORRECT ANSWER✔✔ Sleeved in plastic or PVC pipe with no fittings below the floor Fuel units (oil pumps) preform the following functions - CORRECT ANSWER✔✔ Move oil from the tank to the burner and deliver oil at a constant regulated pressure to the nozzle
The best way to clear a clogged oil line is to - CORRECT ANSWER✔✔ Use a hand pump to pull the blockage out If the oil level in the tank is 4 feet below the fuel unit in 10 feet away, the approximate vacuum should be - CORRECT ANSWER✔✔ 5 - 6 inches If the operating vacuum reading a significantly above the calculated vacuum, you probably have a - CORRECT ANSWER✔✔ Clogged oil filter If the operating vacuum reading is significantly less than the calculated vacuum, you probably have a - CORRECT ANSWER✔✔ Suction line leak It is best to connect your unit as a one pipe system instead of a 2 pipe system because - CORRECT ANSWER✔✔ One pipe leads to longer filter life and eliminates worries about leaking return lines
Nozzle after trip can be caused by - CORRECT ANSWER✔✔ a defective pressure regulating valve, air in the nozzle line, and oil expansion in the nozzle after shut down The flow rate stamped on the nozzle is based on: - CORRECT ANSWER✔✔ 100 PSI A proper combustion chamber: - CORRECT ANSWER✔✔ Is large enough so the fire doesn't touch (impinge on) any surface,
reflects heat back into the fire, and is made of material (like ceramic) that heats up quickly and cools off quickly Too much draft over the fire can occur when - CORRECT ANSWER✔✔ There are leaks between the sections of the boiler that let basement air into the heat exchanger What are the 3 funtions of an Oil Burner nozzle? - CORRECT ANSWER✔✔ Atomize, Meter, Patter. What are the 2 voltage circuits of a primary control? - CORRECT ANSWER✔✔ Line & Low. What is the function of a fuse? - CORRECT ANSWER✔✔ Protect circuit. What is the High Limit cut out? - CORRECT ANSWER✔✔ Max safe Temp or Pressure setting. What is the High Limit cut in? - CORRECT ANSWER✔✔ Cut out minus Differential.
ANSWER✔✔ 3/
Largest oil capacity for residential without a license? - CORRECT ANSWER✔✔ 10,000 Gallons At what height ceiling would a second thermal switch be required? - CORRECT ANSWER✔✔ 12' A typical residential oil burner is also s/u to run Kerosene True? Or False? - CORRECT ANSWER✔✔ False Permit to install an oil burner is issued by the? - CORRECT ANSWER✔✔ State Fire Marshall Draft measurements are taken in what? - CORRECT ANSWER✔✔ Inches of water column Pressure Relief for a Hot Water Boiler is? - CORRECT ANSWER✔✔ 30 Psi Pressure Relief for a Steam Boiler is? - CORRECT ANSWER✔✔ 15 Psi
How many cubic feet of Air is required for a 1 gallon nozzle? - CORRECT ANSWER✔✔ 1, If a power vent fails to start or shuts down during operation, will this affect the burner? Yes? Or No? - CORRECT ANSWER✔✔ Yes A Hot Water Boiler needs a low water cut off if over 300, B.T.U's? - CORRECT ANSWER✔✔ False What is the proper draft setting for an oil burner? - CORRECT ANSWER✔✔ .02 Inches WC Taco Zones Valves draw .9 Amps? True? Or False? - CORRECT ANSWER✔✔ True An oil burner tank must be how many feet minimum from an oil burner? - CORRECT ANSWER✔✔ 5 Feet Minimum What is the gauge thickness for a 220 Gallon tank? - CORRECT ANSWER✔✔ 12 Gauge
Give 2 reasons why draft is necessary? - CORRECT ANSWER✔✔ Remove flu gasses & efficiency. Would an increase in excess air raise or lower the stack temp? - CORRECT ANSWER✔✔ Raise Where should a hot water temp operating control not be located? - CORRECT ANSWER✔✔ Away from the tankless coil What are the requirements for pressure controls for boilers? - CORRECT ANSWER✔✔ Line Voltage, ( Max 15 psi ) , Mounted on pigtail, and above water line. What info on an oil burner certifies it has been approved by the Marshall? - CORRECT ANSWER✔✔ Mass Approval # What is a scavenger period? - CORRECT ANSWER✔✔ Pre + Post Purge What are two methods used by domestic oil burners to prepare oil for combustion. - CORRECT ANSWER✔✔ Atomize & Vaporize
What is composition of #2 fuel oil? - CORRECT ANSWER✔✔ 85% carbon & 15% Hydrogen What must be installed on gravity oil burners for safety? - CORRECT ANSWER✔✔ Constant Level Valve After a Thermostat has been installed what should be checked? - CORRECT ANSWER✔✔ Level, Heat Anticipator, Calibration What is a Cad Cell? - CORRECT ANSWER✔✔ A light sensitive Resistor What is the melting point of solder used on oil lines? - CORRECT ANSWER✔✔ 500 Degrees F Why should you not allow an oil pump to create more then 12" of Vacuum? - CORRECT ANSWER✔✔ Cavitation What parts are replaced on an annual tune-up? - CORRECT ANSWER✔✔ Filter, nozzle, strainer, and pump Gasket When is alarm used on an oil tank? - CORRECT ANSWER✔✔ When you can not tell what level while filling
How many BTU's in a Gallon of #2 fuel oil? - CORRECT ANSWER✔✔ 140,000 Btu's How is an electrical solenoid valve wired and where is it installed? - CORRECT ANSWER✔✔ Wired in parallel & installed to the motor What is a series circuit? - CORRECT ANSWER✔✔ One path for electrons to flow What is a camium sulfide cell? - CORRECT ANSWER✔✔ A visual Flame detector How would you test the safety timing on a stack switch? - CORRECT ANSWER✔✔ Disconnect T 3 Can material other then steel be used for construction of a light fuel oil tank? - CORRECT ANSWER✔✔ Yes if Approved What are the requirements when installing two tanks together to a common supply line? - CORRECT ANSWER✔✔ Tanks must be level
What is the voltage found on the TT Terminals? - CORRECT ANSWER✔✔ 24v What gauge wire is used for a T Stat? - CORRECT ANSWER✔✔ 18 Guage Is Carbon Monoxide a desirable flue gas? - CORRECT ANSWER✔✔ Hell no! What is the purpose of a low limit control on a steam or hot water boiler? - CORRECT ANSWER✔✔ Maintain boiler temperature for domestic What is a by pass plug used for? - CORRECT ANSWER✔✔ 2 pipe system How long after the completion of an installation must a certificate of completion be submitted? - CORRECT ANSWER✔✔ Within 72 hours When must a low water cut off be used? - CORRECT ANSWER✔✔ All steam boilers and hot water boilers over 400,000 btu's
