NORA Oil Heat Exam Review Questions Latest Update 2025-2026 50 Questions and 100% Verified Correct Answers Guaranteed A+ A "low limit" turns on the burner if the boiler gets too cool.A)T
B)F - CORRECT ANSWER: A)T
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
A circulator is best installed
- After the expansion tank
- Before the expansion tank
C)On the return - CORRECT ANSWER: After the expansion tank
A Co2 test indicates A)Smoke B)Complete Combustion C)Excess Air
D)Carbon Monoxide - CORRECT ANSWER: C)Excess Air
A fuel de-aerator removes small amounts of sludge from the oil A)T B)F - CORRECT ANSWER: B)F - it removes small amounts of air from the oil 1 / 2
A fuel pump's loose "cone valve" will cause pulsation of the flame?A)T
B)F - CORRECT ANSWER: A)T
A low oxygen percentage means?A)High Co2 B)High Excess Air
C)Low efficiency - CORRECT ANSWER: High Co2
A LWCO is a A)Thermostat B)Safety Control
C) thermostatic element - CORRECT ANSWER: Safety Control
A reverse acting aquastat A)Turns boiler off on temp increase 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
An E.C.M motor is just like a PSC has a start switch - CORRECT ANSWER: Variable
Speed
Co2 "red fluid" is good for how many tests?A)100 B)200 C)300
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