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Oil Heat Exam Newest 2025 featuring accurate
and verified questions covering oil burner
operation, fuel systems, combustion principles,
safety standards, maintenance procedures, and
troubleshooting techniques. ALREADY GRADED
what type of circuit has more than one path to complete circuit <<>> parallel alternating current in the US operates at how many cycles per second <<>> 60 electrical wire is rated for <<>> ampacity 12 gauge wire would typically be good for up to how many amp circuit breaker <<>> 20 amp 10 gauge wire would typically be good for up to how many amp circuit breaker <<>> 30 amp 14 gauge wire would typically be good for up to how many amp circuit breaker <<>> 15 amp
all electrical wire connections should be made where <<>> junction box where are the hot wires connected on single pole switch <<>> gold terminals how are the neutral wires connected when wiring a single pole switch <<>> together what type of circuit has one path to complete circuit <<>> series the code for electrical work done in Massachusetts is <<>> National Electrical Code a device that responds to change in air temperature opening or closing a switch is called <<>> thermostat what is the safety that opens if temperature goes above preset point <<>> limit control
G <<>> fan R <<>> low voltage power w <<>> heating c <<>> common RH <<>> low voltage power heat only RC <<>> low voltage power cooling only W2= <<>> heat second stage Y2 <<>> cooling second stage what is the minimum gauge wire that can supply thermostat <<>> 18 voltage of typical heating system from panel is <<>> 120 volts
what letters are on low volatage side of a 24v transformer <<>> R and C what would happen if the wire off R terminal made contact with a wire coming off C terminal without first going through a load device <<>> would blow low voltage fuse or if there's not a fuse in that line the transformer would become defective and need replacement. How is the primary control wired <<>> In a series with the burner What is the maximum amount of gallons of oil storage allowed in a building without a special license <<>> 10,000 gallons What pressure should most fuel pump not be set to run above? <<>> 175 psi but pumps should be checked because some pumps can run as high as 300 psi Is the high limit control an operating control <<>> No it's a safety What kind of paint does an outside tank must be used to protect it from atmospheric damage <<>> Asphalt paint
Vent size of oil tanks 660 gallons or less ___ and 661 to 1320 gallons is _______ <<>> 1 1/4 , 1 1/ What is a cad cell <<>> Variable resistor What fuel pump can pull the deepest vacuum <<>> Two stage fuel unit , two pipe How many oil tanks equaling 660 gallons can be located outside a building <<>> 1 or 2 How is high limit control wired <<>> First control after service man switch What is a btu <<>> British Thermal Unit - the amount of energy required to heat 1 pound of water 1 degrees Fahrenheit What should cad cell read in the dark <<>> Over 20,000 ohms Outside oil tank cannot block <<>> Way of egress
What should cad cell read in light <<>> Under 1, Ohms All oil tank not maintaining a constant oil level by an automatic pump shall have what <<>> Gauging device Cad cell senses <<>> Light A reverse acting aqua stat is used in a hydronic system for what reason <<>> Keep minimum boiler temperature The minimum safety timing of a stack mounted primary control in seconds <<>> Maximum of approximately 75 seconds Give reason oil would drip from the nozzle after the burner is shut down <<>> Defective fuel unit regulator, gasses trapped in nozzle line, oil expansion in nozzle line due to excessive radiated heat at shut down The valve used to prevent gravity circulation through the system when the boiler maintains <<>> Flow control valve
A zero smoke and low C02 or high 02 reading at the flue pipe and over the fire is an indication? <<>> Too much air When draft reading cannot be taken over the fire what range is acceptable at the boiler outlet? <<>> -. What is a way to test ignition transformer working properly <<>> Set springs on secondary side of transformer 1/2 apart and check if spark jumps gap when power is supplied to primary side of transformer A fan / limit switch is found on what type of heating system <<>> Hot air furnace Oil burners starts but fire does not it maybe because of <<>> There is too much combustion air Dust buildup on combustion air can blades would <<>> Decrease airflow If an oil burner is not producing visible can it still produce carbon dioxide <<>> Yes
When installing oil fired hot water heater into a chimney with oil fired hot air furnace where should flue for water heater go <<>> Above furnace flue pipe Electrical short circuit means <<>> Occurs whenever power goes directly to nuetral or ground Is it recommended for booster fuel units to be used in combustion with pressure regulating valve as protection when more than one burner is used <<>> Yes Electrical closed circuit means <<>> A complete or operating circuit Electrical open circuit means <<>> A circuit that does not allow flow of electricity to complete the circuit such as open switch or wire disconnected Calculate vacuum <<>> 1" of vacuum for each foot of lift, 1" of vacuum for each 10'of horizontal run, 1/2" for filter Increasing the fuel pump pressure will <<>> Increase the nozzle firing rate
How to test OSV <<>> Perform a vacuum test on oil line and pump from just after OVS What height does a power venter need to be over public way <<>> 7ft Combustion air obtained from freely communicating with outdoor permanent openings total free area of not less than <<>> 1 square inch per 5,000 btus per hour Combustion air obtained from two permanent openings one near top of space and one near bottom of space each opening total free area of not less than <<>> 1 square inch per 1,000 BTU's per hour Combustion air obtained by means of ducts to outdoors vertically from two permanent openings one near top of space one near bottom of space each opening total free area of not less than <<>> 1 square inch per 4,000 BTU's per hour The main source of air into a hydronic system is the <<>> Supply water An automatic air bleed valve controls the airflow out of the system by means of a <<>> Float
Voltage of oil burner safely control circuit shall not exceed <<>> 150 volts What is the minimum thickness for a steel flue pipe up to 9 inch round <<>> 26 gauge Can a manually operated draft damper be used in the chimney connector <<>> No Can a chimney connector pass through or be hidden behind a wall to connect to a chimney <<>> No what would cause pulsating oil pressure and fire <<>> defective fuel pump, defective burner motor, defective burner coupling, air leaks in oil line, partially clogged strainer or filter what is the final product of burning hydrogen <<>> water vapor +nitrogen +heat what is the final product of burning carbon <<>> carbon dioxide +nitrogen +heat
a tank less domestic water system provides hot water from a coil in the boiler <<>> yes FF on burner primary control is wired to <<>> cad cell TT on the burner primary control is wired to <<>> thermostat what is the amount of BTU'S in 1 gallon of No2 heating oil <<>> 140,000 BTU'S what is an oil safety valve <<>> when installed at the supply tank in gravity feed oil system, prevents the flow of oil should the supply line to the burner rupture or break. and protect the oil burner pump from input pressure exceeding three psi as heating oil gets warmer its viscosity would <<>> decrease is the fill or vent pipe terminated at higher point <<>> vent
air in the ht water circulating system will cause <<>> noise, flow blockage, corrosion The most popular way of heating a hot water system is. by use of __ on the outer walls of the area <<>> finned- type baseboard when high limit opens what will shut off <<>> burner high pressure steam system is anything over what pressure <<>> 15 psig or 9 horsepower what is the minimum size vent pipe for 275 gallon oil tank <<>> 1.25' what is the height above the ground of vent pipe <<>> at a point that would avoid being obstructed by snow and ice vent pipe shall terminate not more than ____ft from fill pipe and at a point visible from the fill point <<>> 12 ft
all oil storage tanks not maintaining constant oil level by an automatic pump shall have what <<>> method of determining level after installing a new nozzle you should <<>> reset electrodes can you replace a helix coil stack switch controller with a cad cell relay <<>> yes in a single stage fuel oil pump the oil is fed to the burner by capillary action <<>> no what is the first set after finding primary control tripped put <<>> check for oil in fire box what are the two most common speeds of an oil burner motor <<>> 1725 and 3450 stack temperature over _____ is needed to prevent condensation <<>> 350F
a limit control on a hot water boiler is needed to <<>> protect the boiler against excessive water temperatures what does the pressure relief valve do <<>> it is set to relieve the pressure in the boiler below the maximum design pressure of the boiler the expansion tank provides a means of removing the air from the system as well <<>> provides a space for the water expansion and contraction with water temperature changes in a series loop hydronic heating piping system <<>> all the heated water flows through all the terminal units what's the cost for oil burners apprentice license <<>> $ what Is the minimum gauge steel that can be used for an above 275 gallon tank <<>> 12 gauge what are the prerequisites to apply for oil burner apprentice <<>> 18 years old that's all
