PE 4B1 Chapter 91 Oil Burners for Heating Boiler Questions and Answers

PE 4B1 Chapter 91 Oil Burners for Heating Boiler Questions and Answers At what approximate angle does the fuel meet the atomizing air in an atomizing air oil burner? A. 15 degrees B. 25 degrees C. 45 degrees D. 90 degrees E. 180 degrees D The part of an air atomizing burner that imparts a turning motion to the oil is the : A. Swirler B. Orifice C. Body D. Strainer E. Spring A Proper adjustment and gapping of electrodes or spark plugs is critical to prevent what in boilers? A. Electrode stall B. Puff back C. Low efficiency D. Excess air consumption E. Low heat transfer B Before atomization can occur, heavy oils are heated to approximately: A. 203 degrees C B. 95 degrees C C. 115 Degrees C D. 75 degrees C E. 150 degrees C B What is used to remove dirt, rust, moisture,etc from a fuel system? A. A magnetic screen B. A screen C. A filter D. A separator E. A precipitator C With a mechanical pressure atomizing oil burner, which firing rate would give the best atomization? A. 10% full load B. 25% full load C. 50% full load D. 75% full load E. 100 % full load E In a heating boiler with two fixed capacity oil nozzles, when is the primary nozzle used by itself? 1. Start up 2. High heat demand 3. Low heat demand 4. Never A. 1,3 B. 2,4 C. 1,2,3 D. 2,3,4 E. 4 A What does a modulating oil burner use in order to match heat demand? A. A swirled in the nozzle B. A regulating valve in the return C. A system of multiple igniters D. A step controller E. A positive displacement pump B How does a modulating capacity mechanical atomizing oil burner vary the amount of oil passing through the burner tip? A. By reducing the supply pressure B. By narrowing the burner orifices C. By increasing the oil back pressure D. By bleeding some of the oil back to the fuel tank E. By operating a regulating valve in the supply line D In a fuel oil system, the cut-off valve will close when: A. The firing rate increases B. The firing rate decreases C. The fuel pressure exceeds a maximum pressure D. The fuel pressure falls below a minimum pressure E. The heat load is met D