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NORA OIL HEAT EXAM REVIEW |
QUESTIONS & ANSWERS (VERIFIED) |
LATEST UPDATE | GRADED A+
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
