OIL HEAT EXAM NEWEST 2025 FEATURING 300 ACCURATE AND VERIFIED QUESTIONS COVERING OIL BURNER OPERATION, FUEL SYSTEMS, COMBUSTION PRINCIPLES, SAFETY STANDARDS, MAINTENANCE PROCEDURES, AND TROUBLESHOOTING TECHNIQUES.

OIL HEAT EXAM NEWEST 2025 FEATURING 300 ACCURATE AND VERIFIED QUESTIONS COVERING OIL BURNER OPERATION, FUEL SYSTEMS, COMBUSTION PRINCIPLES, SAFETY STANDARDS, MAINTENANCE PROCEDURES, AND TROUBLESHOOTING TECHNIQUES. An E.C.M motor is just like a PSC has a start switch - ANSWER-Variable Speed What does post purge (motor off delay) help with? A)Clean startup B)Clean shutdown C)Forming good air pattern - ANSWER-B)Clean Shutdown 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 - 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 - ANSWER-High stack temp (less air over the heat exchanger) What is B5? A) 5% biofuel 2 | Page B)5% petroleum C)#5 Oil - 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 - ANSWER-Dirty Fan What do you adjust to treat high draft? A)Air Shutter B)Chimney Height C)Draft Regulator D)Barometric Damper - ANSWER-Draft Regulator Fuel oil completely burns when lit with a match at the "flash point" temperature A)T B)F - ANSWER-B)F What will not help with "gelled oil tank"? A)Kerosene B)Chemical Treatment C)Added Water - ANSWER-Added Water A fuel pump's loose "cone valve" will cause pulsation of the flame? A)T 3 | Page B)F - ANSWER-A)T If run time increases, the "off-cycle loss" is likely to A)Increase B)Decrease C)Stay the same - ANSWER-Decrease What is a DPDT switch? - ANSWER-Double Pole Double Throw A "low limit" turns on the burner if the boiler gets too cool. A)T B)F - ANSWER-A)T Which does a "combination fan limit" control not do? A)Turn the furnace fan on B)Turn the furnace fan off C)Turn the burner off on high limit D)Turn the burner on at low limit - ANSWER-Turn the burner on at low limit What is the final adjustment you make when tuning up an oil burner? A)Draft B) Change Nozzle C)Oil Pressure D)Combustion Air - ANSWER-D)Combustion Air