UNIT 32 OIL HEAT EXAM QUESTIONS AND ANSWERS LATEST UPDATE 2025 RATED A+ FOR SUCCESS.

How many grades of fuel oil are normally considered as heating oils. - ANSWERThere are six What two elements make up fuel oil - ANSWERCarbon and Hydrogen The most common fuel oil used for residential and light commercial is? - ANSWERNumber two As the temperature of an oil sample decreases; - ANSWERThe viscosity of the oil increases When incomplete combustion occurs, what additional by-products of combustion are created? - ANSWERCarbon monoxide, soot or free carbon. The minimum nuzzle pressure for residential and light commercial gun type oil burner is? - ANSWER100 Psi. Two types of oil burner pumps are______ stage and _______ stage - ANSWERSingle, two If oil is to be stored at temperatures lower than 20 degrees F. - ANSWERThe viscosity will be thicker. Explain why periodic oil tank inspection is desired: - ANSWERTo ensure that the tank is free of leaks and that the protective anodes are in good working conditions. If it is expected that an oil-fired appliance will burn 850 gallons of oil per year, how big the oil storage be? - ANSWER275 gallons. How many pounds of oxygen are required to burn 1 pound of Number two fuel? - ANSWER3 Lbs of oxygen Explain the concept of excess air when it is used to describe the combustion process; - ANSWERMost oil burners are set up to burn with appoximately 50 % Excess air. When 1Lb of oil with 50% excess air is burned 21.6 lbs. or 288 CuFt. of air must be furnished. Before fuel oil can be burned, it must be - ANSWERAutomized