The cross connection between two supply tanks shall not exceed? - ANSWER 660 gallons
When is an automatic draft control not required? - ANSWER When the equipment is designed to control the draft.
Combustion perform
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The cross connection between two supply tanks shall not exceed? - ANSWER 660 gallons
When is an automatic draft control not required? - ANSWER When the equipment is designed to control the draft.
Combustion performance testing can indicate: - 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: - ANSWER Sufficient draft is available for safe operation of all connected equipment.
Delayed ignition can be caused by: - ANSWER Weak ignition transformer
You should replace the oil burner nozzle with: - ANSWER The manufacturers recommended nozzle spray pattern and spray angle.
Viscosity problems can be corrected by: - ANSWER Decreasing the nozzle size and increasing the pump pressure accordingly
The minimum operating pressure of an oil pump is: - ANSWER 100 PSI
If a stack relay fails you, must? - ANSWER Replace it with an approved type controller
Aquastats are normally found on what type of heating systems? - ANSWER Hydronic
Airstats are found on what type of heating systems? - ANSWER Forced warm air systems
Under sized returns on a warm air system can result in what? - ANSWER Short cycling of the oil burner
Incorrect nozzle selection in regards to gallon per hour, can result in what problems in a steam system? - ANSWER Some radiators not heating quickly enough
Low boiler water temperature in a hydronic hot water system may be caused by? - ANSWER Undersized oil burner nozzles
Delayed opening oil valves are used to? - 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: - ANSWER A backflow prevention device
How can a damaged heat exchanger be detected on a forced warm air system? - 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? - ANSWER To maintain temperature for domestic hot water
On a steam system, a plugged siphon loop can have what affect on the heating system? - 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? - ANSWER The boiler going off on high limit before reaching the minimum circulator temperature
An advantage of flame retention burner is - 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 - ANSWER Combustion air
Dirt or lint buildup in the bevel of the burner fan blades will - ANSWER Reduce the amount of combustion air
To change the air ratio for different firing rates with an adjustable head burner you - ANSWER Adjust the position of the drawer assembly in the Air tube
All petroleum products are chemical compounds of - ANSWER Hydrogen and carbon
1 gallon of #2 oil contains approximately how many BTU's? - ANSWER 140,000 BTU's
Flashpoint of a fuel is an indication of - ANSWER The lowest temperature at which the fuel will flash but not continue to burn
The pour point of #2 oil - ANSWER Can be lowered by blending with kerosene, can be lowered with fuel additives, and is the lowest temperature at which it will flow
Maximum fuel allowed without a license - ANSWER 10,000 gallons
Is heating oil gets colder its viscosity (thickness): - ANSWER Increases
Sulfuric acid in combustion gases can: - ANSWER Damon's the flue lines, it holds in the flue pipe, and create a scale buildup in the heat exchanger
The home for bacterial growth and sludge in the bottom of the oil tank is - ANSWER Water
To ensure clean, uncontaminated fuel reaches the oil burner you must - 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 - 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: - 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 - ANSWER Sleeved in plastic or PVC pipe with no fittings below the floor
Fuel units (oil pumps) preform the following functions - 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 - 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 - ANSWER 5 - 6 inches
If the operating vacuum reading a significantly above the calculated vacuum, you probably have a - ANSWER Clogged oil filter
If the operating vacuum reading is significantly less than the calculated vacuum, you probably have a - ANSWER Suction line leak
It is best to connect your unit as a one pipe system instead of a 2 pipe system because - ANSWER One pipe leads to longer filter life and eliminates worries about leaking return lines
A fuel de-aerator: - ANSWER Eliminates the need for a return line back to the tank
A cause of pulsating oil pump pressure and a pulsating fire is - ANSWER Air leaks in the suction line
Increasing the fuel pump pressure will - ANSWER Increase the flow rate
The purpose of an oil burner nozzle is to - ANSWER Automize the oil, provide a pattern of oil spray, and meter the amount of oil burned
When replacing nozzle - ANSWER Follow the manufacturer's recommendations
To reduce combustion problems caused by cold oil - 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 - 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: - ANSWER 100 PSI
A proper combustion chamber: - 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 - ANSWER There are leaks between the sections of the boiler that let basement air into the heat exchanger
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