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Mass oil burner / NFPA 31 & NORA exam | Actual Questions and Answers
Latest Updated 2024/2025 (Graded A+)
Cast iron fittings can be used in heating fuel systems? - ✔✔False Tank vent shall terminate - ✔✔Within 12 feet of the fill and visible from the fill Tanks exceeding 330 gallons must have - ✔✔Top supply connection Fuel return piping from an appliance shall - ✔✔Enter the top of the tank Oil appliances burning used oil shall only be installed - ✔✔In commercial or industrial occupancies Technician must be present for filling of new oil tank - ✔✔False A common tank vent pipe shall be - ✔✔One pipe size larger than the largest individual vent pipe connected to it If oil supply piping is not visible for inspection you must - ✔✔Pressure or vacuum test the line Installation instructions for the care and operation of the appliance must be posted - ✔✔True Oil burning appliances shall have - ✔✔Limit control for pressure in steam, temperature in water boiler, and temperature in furnace Above ground tank installed inside must be pitched - ✔✔Torwards the supply at a pitch of 1/4 inch per foot Outdoor tanks must be located - ✔✔Five feet from property line for 275g or smaller, ten feet for more than 275 but not exceeding 660g. Must be on concrete slab
A chimney connector shall maintain a pitch or rise of - ✔✔1/4 inch per foot Minimal gauge thickness for steel flue pipe connectors less than nine inches in diameter - ✔✔26 gauge Oil fired water heater must be equipped with water temp, pressure, and vacuum relief device - ✔✔True Tank vent piping shall be - ✔✔Pitched forward tank, terminate two feet minimum from building openings, corrosion resistant weatherproof cap Direct vent systems shall terminate - ✔✔4 feet horizontally from a building opening Fuel can be transferred from tank to appliance by pressurizing the tank - ✔✔False Fusible link safety shutoff valves shall be located - ✔✔Within six inches of the filter between the tank and filter Before installation of new oil burner you are required to - ✔✔Inspect the combustion chamber A crankcase oil burner can be installed in any location where a standard oil burner was located - ✔✔False Can tanks be installed in garages - ✔✔Yes, if protected from vehicle impacts by barriers Teflon tape can be used on oil lines - ✔✔False The trial for ignition period for oil burners less than 20 GPM is? - ✔✔15 seconds Fusible switches shall operate at a temp of - ✔✔165F
Can I use any form other than form 1 or form 1A - ✔✔No, only form 1 and 1A are approved by state fire Marshall What must I do if I have a oil tank larger than 10,000 gallons - ✔✔You must apply for, and obtain both a permit and license from the local town or city for the use of the tank What license are acceptable for installing an oil burner or oil tank - ✔✔M.G.L c. 148, & 10D, and applicable provisions of St. 1964, C. 680 allows for only the holder of certificate of competency to install oil burner equipment and sign form 1A Do I need to pull a permit when replacing an oil line or installing an osv - ✔✔Yes. Any alteration of oil burner install requires a permit be pulled under CMR 1.00 using form 1 only Can I cross connect two tanks at bottom with 3/8 pipe tubing - ✔✔No, cross connecting must be made with no smaller than 1/2 inch iron pipe or o.d. Tubing On a new install, can I install an OSV in the supply line instead of enasing the line - ✔✔No, on new installs where the supply line is in direct contact with concrete or earth, the supply line must be in a sleeve Is any non metallic material acceptable for use as an oil line sleeve? Would pvc hose be allowed - ✔✔Yes When can I use an oil safety valve - ✔✔On existing installations when a burner, boiler, furnace or tank is replaced Can I use either button type or wheel type firomatic switches - ✔✔Yes, any thermal switch that follows CMR 1.00 and 527CMR12.00 may be used Can I use a stack switch - ✔✔Only to replace an existing control of the same type already in use and existing
Can a technician replace an existing primary control with a safety timing of more than 15 seconds - ✔✔Only to replace an existing primary control of the same type already in use. All new primary controls must be under 15 seconds Are probe type or float type low water cutoff switches acceptable - ✔✔Yes. As long as they are used per the appliance manufacturer instructions Do I have to Sheetrock or install a sprinkler if I have combustibles within five feet vertical of the burner - ✔✔No, the overhead protection requirement is no longer required after January 1, 2015. Can any power center be used - ✔✔Yes, as long as it's listed and used per manufacturers instructions Must I install a draft regulator - ✔✔No, as long as the manufacturer exempts it. A natural draft burner may require one, mechanical draft burner do not. Suitable relief on air inlet system - ✔✔A vacuum breaker or air pressure switch. Is 100% outside air required for combustion - ✔✔No, however it must be proven than infiltration air will be adequate Can I place an oil fired unit up against a wall - ✔✔Yes, as long as it was constructed for zero clearance from combustiables. Clean out and service panels may NOT be blocked Is a drop type lever valve acceptable - ✔✔Yes, as long as it's installed to the manufacturer specs How many valves are required on an install - ✔✔A minimum of only one at the tank and burner. Must be firomatic. No manual valves allowed Must I install a 1/4 turn valve - ✔✔No, unless you chose not to use a emergency switch. The valve must be outside the room the boiler is in and clearly marked
Do I have to construct a chimney connector to any certain size - ✔✔Yes: masonry and metal chimneys shall be built in accordance with 780 CMR Does an entire installation have to be upgraded when anything is altered? - ✔✔No A form 1 may be used for alteration, installation, or replacement of any part of an oil burner installation
- ✔✔False, form 1A is only to be used for the inspection of an existing oil line, oil safety valve and tank Must all tanks be installed on continuous slabs extending 8 inches beyond the perimeter - ✔✔Yes Cross connected, series piped tanks must be equipped with a tank gauge on the vented tank only - ✔✔True As of July 1 2010, all oil lines must comply with MGL 453 and NFPA-CMR1.00 - ✔✔Yes all oil lines after January 9 2010 must be replaced with a sleeved line, or upgrade with an OSV, or non metallic sleeve. What form should be used for notifying fire department that an above ground tank has been removed due to abandonment for fuel switching - ✔✔Form 1 Must I use a thimble in a chimney - ✔✔Although still recommended, a thimble is no longer required Confined space - ✔✔Any space whose volume is less than 50 cubic feet per 1,000BTU/HR Do you need a permit to remove an oil tank - ✔✔Yes Atomizing type burners were designed to burn what type of fuel - ✔✔No. 2 fuel oil Pour point problems with outside above ground oil tanks can be partially relieved by - ✔✔Reducing the pour point of no. 2 fuel oil by blending it with no. 1 fuel oil
A fuel oil storage tank can not be installed - ✔✔Within 5 feet of the heating unit The primary purpose of a fuel pump on burner is to - ✔✔Deliver oil to nozzle at constant pressure, move oil from tank to pump, and provide screen to filter the oil If vacuum reading is above calculation - ✔✔Plugged fuel filter, kinked supply line, check valve is sticking Most new flame retention burners run at what rpm - ✔✔3450rpm To check for proper nozzle line cut off, pressure gauge is installed in what port - ✔✔Nozzle port Fuel units generally set for what psi - ✔✔100 psi The oil burner nozzle in a high pressure burners performs following functions - ✔✔Atomizes the oil, provides a pattern of oil spray, delivers fixed amount of oil Nozzle flow rate, spray angle, and pattern are affected by the - ✔✔Produce, swirl chamber, and tangential slots Cold oil or high viscosity problems may be eliminated by - ✔✔Increase pump pressure and use smaller nozzle, install nozzle line pre heater What condition effects nozzle spray droplet size - ✔✔Fuel pump pressure To burn one pound of fuel oil, it takes how many pound of air - ✔✔14.4lbs A layer of soot 1/16" thick will increase fuel consumption by - ✔✔4% When sizing combustion chamber for 1.00gph you should provide a minimum space of - ✔✔Between 80 to 100 square inches
What switch opens when the motor has almost reached full speed - ✔✔Centrifugal Most speeds used in American made burners are - ✔✔1725, 3450 rpm Because burner fans have beveled blades any dirt or lint in the blade will - ✔✔Reduce the amount of air for combustion Fan limit control on a furnace does what - ✔✔Shuts off the burner, starts the blower, and stops the blower at a predetermined time High limit control in residential must be - ✔✔Line voltage and wired in series with the primary control Low voltage thermostats are used more because - ✔✔They are more sensitive to ambient temperate Primary control must be capable of - ✔✔Reacting to absence of flame, controlling ignition and motor Sufficient amount of pressure in steam system - ✔✔2psi When replacing steam boiler it is important to - ✔✔Follow the manufacturer piping instructions In a one pipe steam system, min distance between the water level and the bottom of the lowest steam carrying pipe is - ✔✔28 inches To prevent scalding temps in domestic water with tankless coil it is necessary to install a - ✔✔Tempering valve A typical residential zone valve for a hot water system normally operates on - ✔✔24v In most residential system, design temp difference between supply and return water is - ✔✔20F
To properly size a zone circulator you must know the following - ✔✔The GPM and feet of head of the piping What is used to prevent gravity circulation in a heating system - ✔✔Flow control valve In a warm air system, return air duct size should never be less than - ✔✔80 percent of the supply 3 main causes of nozzle drip - ✔✔Defective pump shutoff valve, air trapped in nozzle, oil expansion in nozzle by radiated heat Oil burner must be how far from oil tank and panel board - ✔✔3 feet from electrical, 5 feet from oil tank Safety control circuits shall be - ✔✔2 wire, one side grounded, with a nominal voltage not exceeding 150volts Two or more oil burning appliances may be connected to the same chimney as long as - ✔✔Draft is sufficient Air pressure switch will do what if proper draft is not proven - ✔✔De-energize the burner control circuit preventing the burner from operating Burner, automatically ignited - ✔✔Main burner fuel may be turned on and ignited automatically Burner, manually ignited - ✔✔Main burner fuel turned on only by hand Burner, mechanical draft - ✔✔Burner that includes a power driven fan to supply air for combustion process Burner, natural draft type - ✔✔Burner that depends on the natural draft from the chimney and venting
Oil burner - ✔✔Device for burning oil in heating appliances. May be pressure atomizing gun type, horizontal or vertical rotory type, or mechanical or natural draft vaporizing type Post purge control - ✔✔Electrical control that allows the power venter or burner to operate after the flame has shut off Power venter - ✔✔Electrically operated mechanical fan designed to produce a negative draft at the heating appliance Secondary safety control - ✔✔De energizes the burner circuit in case of positive pressure in the power vent system What type of valves may be used - ✔✔Readily accessible, hand operated, fusible, spring loaded valves Safety valve - ✔✔Automatic oil control valve of the on and off type that is actuated by safety control device Water heater - ✔✔Indirect fired fuel burning or electrically heated appliance for heating water to temp not greater than 200F, input not greater than 200,000 BTU/hr with water capacity not exceeding 120GAL Permit is not required for - ✔✔Routine maintainence, such as nozzles electrodes and filters. However a combustion test must be performed Two supply tanks may be provided with one fill and vent provided that: - ✔✔Fill and vent are not connected to same tank Crossover pipe is minimum two inch diameter with swing joints and ground joint union Vent to outside is minimum two inch diameter Vent pipes must be - ✔✔Two feet from building openings, 3 feet above grade
Oil gauge on cross connected tanks - ✔✔Gauge shall be installed on the tank vented to the outside Whenever something is replaced on existing install, the oil line must be - ✔✔Replaced or enclosed in a nonmetallic sleeve or an oil safety valve must be installed at the tank end per manufacturer specs Oil supply and return lines going to tank exposed to freezing temps shall be - ✔✔Connected to the top of the tank Oil burner less than 20 gallon per hour must have control that will shutoff oil in - ✔✔15 seconds if ignition is not established. Installation of intermittent primary controls is permitted - ✔✔False Each automatically fired hot water boiler with heat input greater than 500,000 BTU/hr must have - ✔✔Listed automatic low water fuel cutoff Oil burners shall be energized by - ✔✔A separate branch circuit located at the disconnect panel, or branch circuit sub panel All protective, control and emergency devices shall be wired in - ✔✔Series from the electrical panel, through the emergency switch, through the thermal switch, to the service switch. Burner controls shall be installed in the ungrounded supply conductors and shall not exceed the 150v Service switch must be installed - ✔✔In location where technician can see the fire. Maximum of three feet from the burner Electrical thermal switch - ✔✔Fused to break the ungrounded conductor at 165F, shall be installed in the main power line within six feet over the top of heating appliance If the ceiling above the heating appliance exceeds 12 feet in height - ✔✔An additional thermal switch shall be installed at 10 feet and connected in series with the lower lower switch
Good breech draft is - ✔✔-0.04 to - 0. Conductors - ✔✔Circuit wiring, switches and other devices. Copper, gold, mercury and silver are conductors. High limit is always wired - ✔✔Line voltage in series with the primary control. If cieling is higher than 10 feet the firematic must be - ✔✔Within 6 feet of the appliance Oil filter can be located at the - ✔✔Tank burner or both Outside oil lines must be connected - ✔✔To the top of the tank and insulated. Fusible valve on the inside. Bypass plug is installed in - ✔✔Two pipe systems When testing fuel unit cutoff - ✔✔Pressure should drop and hold NFPA31 limits shaft seal psi to - ✔✔3psi even though most can handle 10psi Pressure gauge goes in what port - ✔✔Nozzle port Nozzles three main functions - ✔✔Atomize Metering Patterning Direct venting - ✔✔Uses the burner to push flue gases Gallon of fuel oil contains - ✔✔140,000 BTU's
Low combustion air will cause - ✔✔Smoke The lower the stack temp the more - ✔✔Efficient the boiler is running Tank rating must be - ✔✔UL- 80 Oil burners electrically controlled must be - ✔✔Supplies from a separate branch circuit located at the service disconnect panel, or branch circuit sub panel Electrical thermal switch must be within - ✔✔6 feet of the top of the boiler or furnace If ceiling exceeds 12 feet, second switch must be installed at - ✔✔10 feet wired in series with the lower switch What is air - ✔✔20.9% oxygen, 78% nitrogen, 1.1% other gases Heating oil is - ✔✔85% carbon and 15% hydrogen Too much air causes - ✔✔Lower Efficiency Too little air causes - ✔✔Incomplete combustion and smoke Smoke and soot is - ✔✔Unburned carbon Layer of soot 1/8" thick can lower efficiency by - ✔✔Over 8% Carbon monoxide is result of - ✔✔Incomplete combustion due to unburned fuel
