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A comprehensive review of nora oil heat exam questions and answers, covering essential topics related to oil burner maintenance and troubleshooting. It includes multiple-choice questions with correct answers, addressing key aspects such as combustion air, draft, oil pressure, and safety controls. Valuable for individuals preparing for nora oil heat certification exams or seeking to enhance their knowledge of oil burner systems.
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What is the final adjustment you make when tuning up an oil burner? A)Draft B) Change Nozzle C)Oil Pressure D)Combustion Air Correct answer: D)Combustion Air What is the effect of having a dirty burner squirrel cage fan? A)Water Hammer B)Incomplete combustion C)Low Co D)Blocked Chimney Correct answer: B)Incomplete Combustion New burners produce "high static pressure" A)Produce more spark B)Push flue gases through tighter boilers
C) Get better atomization Correct answer: B)Push flue gases through tighter boilers Water oil in tanks is necessary because? A) Adds btu value B) Provides a place for bacteria to grow Correct answer: B)Provides a place for bacteria to grow Water enters tanks through? A)Fill caps B)Vents C)Delivery truck D)All Correct answer: D)All A "vent alarm" A)Tells delivery person when to stop B)Call tech when flame fails C)Signals when air vent is clogged Correct answer: A)Tells delivery person when to stop The best way to clear a clogged oil line is to A)Turn the pump pressure up
B)Dirty Oil C)Air in the nozzle line >"cracked line" Correct answer: C)Air in the nozzle line When will a barometric damper open wider? A)Hot summer day B)Cold winter day C)No wind day Correct answer: B)Cold winter day (there is higher draft) When is a burner "over fired"? A)When the nozzle gph is too high B)When the pressure is too high C)When the stack temperature is too high D)All Correct answer: D) All When is a power venter used? A)To ensure sufficient draft B) When horizontal venting C)On every installation Correct answer: A)To ensure sufficient draft
Co2 "red fluid" is good for how many tests? A) B) C) D) Correct answer: B) A Co2 test indicates A)Smoke B)Complete Combustion C)Excess Air D)Carbon Monoxide Correct answer: C)Excess Air If you measure a 10% Co2 in the breech and a 12% over the fire, there must be an air leak in the boiler. A)T B)F Correct answer: A)T Should a smoke test be done "before" or after using an electronic analyzer? Correct answer: Before (so that you don't draw a lot of carbon into the sensitive electronic parts)
B)Turns boiler on with temp increase C)Turns circulator off on water temp drop Correct answer: Turns circulator off when boiler gets too cool What problems are created by a dirty furnace air filter? A)Indoor air pollution B)High stack temp C)Low supply air temp Correct answer: High stack temp (less air over the heat exchanger) What is B5? A) 5% biofuel B)5% petroleum C)#5 Oil Correct answer: 5% bio What is not a cause of positive breech draft? A)Blocked Chimney B)Dirty Fan C)Reduced vent size D)Too many flue pipe elbows Correct answer: Dirty Fan
What do you adjust to treat high draft? A)Air Shutter B)Chimney Height C)Draft Regulator D)Barometric Damper Correct answer: Draft Regulator Fuel oil completely burns when lit with a match at the "flash point" temperature A)T B)F Correct answer: B)F What will not help with "gelled oil tank"? A)Kerosene B)Chemical Treatment C)Added Water Correct answer: Added Water A fuel pump's loose "cone valve" will cause pulsation of the flame? A)T B)F Correct answer: A)T
B)Valve-on delay C)Lockout Timing Correct answer: Valve-On Delay Normal cad cell ohms with flame is A)100 ohms B)500 ohms C)1600 ohms D)100,000 ohms Correct answer: 500 ohms Steam system pressuretrols should be set to cutout at? A)1 psi B)5 psi C)15 psi Correct answer: 1 psi A LWCO is a A)Thermostat B)Safety Control C) thermostatic element Correct answer: Safety Control
A circulator is best installed A) After the expansion tank B) Before the expansion tank C)On the return Correct answer: After the expansion tank A low oxygen percentage means? A)High Co B)High Excess Air C)Low efficiency Correct answer: High Co