Oil Burner Exam Questions and Answers 100% Accurate

The nozzle flow rate, spray angle and pattern are directly related to: - ANSWER-All of the above - tangential slots, swirl chamber, orifice Cold oil or high viscosity problems may be eliminated by - ANSWER-Increasing pump pressure and reducing nozzle size & installing a nozzle line pre-heater The following conditions or elements affect choosing the correct nozzle spray pattern: - ANSWER-Air-oil mixing design of burner & shape of burner Which condition affects nozzle spray droplet size? - ANSWER-Fuel pump pressure To burn one pound of fuel oil, it takes how many pounds of air? - ANSWER-14.4 lbs. A layer of soot 1/16" thick will increase fuel consumption by - ANSWER-4% When sizing a combustion chamber for fire rate of 1.00 gph you should provide a minimum floor space of - ANSWER-between 80 to 100 square inches The most common type of burner design in use today is the: - ANSWER-high pressure atomizing Poor draft due to a faulty chimney may be improved by installing a good: - ANSWER-barometric draft control The pressure differential produced by chimneys is best measured with a draft gauge in: - ANSWER-Inches of water column The most important draft measurement to be taken on any oil-fired unit is: - ANSWER-The draft over the fire The proper location to install a draft inducer is: - ANSWER-In the flue pipe between the draft regulator and the chimney Using combustion test instruments to measure the composition and temperature of the flue gas as they leave the heating unit will indicate the: - ANSWER-steady state efficiency The holes that are provided in the flue pipe for combustion must be: - ANSWER-between the heating unit and the draft regulator When using a pump type smoke tester, ten full strokes are necessary to: - ANSWER-draw the proper amount of flue gas past the paper The fluid in a CO2 tester is good for about how many tests? - ANSWER-For about 200 tests In an electric circuit for the wattage to remain the same if the voltage drops, the amperage must: - ANSWER-increase When applying current through a conductor that is wound in a coil, the magnetic lines of force created are used in: - ANSWER-solenoid valve If in an average 15-amp residential heating circuit, the fuse occasionally blows, you should: - ANSWER-use a volt meter to check out the system To determine the "electrical potential" available at any given point in a circuit you should use a: - ANSWER-Voltmeter Oilburner ignition systems normally operate at what primary voltage? - ANSWER-120 volts Oilburner ignition transformers operate at what secondary voltage range? - ANSWER-10,000 to 14,000 volts