UNIT 32 OIL HEAT EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+

UNIT 32 OIL HEAT EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ If a technician inspects the interior of a combustion chamber and finds large quantities of unburned oil, he would correctly conclude that ____. a. The nozzle may be too small. b. The stack switch may be defective. c. The primary control unit may be defective. d. Both b and c are correct. Answer : D A special tool has been designed to help remove and install nozzles from the burner. It is called a nozzle wrench and it ____. a. has an outer wrench that holds the burner in place, while the inner wrench holds the nozzle b. minimizes the chance of cracking the porcelain c. can only be used on semi-hollow cones d. both a and b Answer : D The number engraved on the nozzle indicates ____. a. how many gallons of air per hour the nozzle will deliver regardless of input pressure b. how many foot pounds of pressure must be used to properly tighten the nozzle c. how many gallons of oil per hour the nozzle will deliver at a given input pressure d. the stock number of the part Answer : C Improper combustion can lead to ____. a. excessive carbon monoxide production b. smoke condition around furnace c. wasted oil d. all of the above Answer : D The grade of fuel usually used in residential and light commercial units is ____. a. No. 1 b. No. 2 c. No. 4 d. No. 6 Answer : B When the oil supply is above the oil burner pump, the pump and supply w