Deck 15: Troubleshooting and Maintenance for Oil-Fired Equipment

Question 1

What would happen if the narrow spray angle nozzle were used in a round combustion chamber?

Answer 1

The spray would hit the rear of the combustion chamber and cause carbon buildup.

Question 2

An oil burner equipped with the CAD cell relay will ignite, run for about ninety seconds, and cut off. What is the first thing the service technician should do?

Answer 2

Clean the surface of the CAD cell.

Question 3

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 3

D

Question 4

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

Question 5

How can a technician tell the difference between an upflow furnace and a downflow furnace?

Question 6

What tests can a technician perform on an oil furnace that will check the combustion efficiency?