32 Oil Heat

If a technician inspects the interior of a combustion chamber and finds large quantities of unburned oil, he would correctly conclude that__________

• The nozzle may be too small.

• The stack switch may be defective.

• The primary control unit may be defective.

• Both b and c are correct.

The number engraved on the nozzle indicates_______

• How many gallons of air per hour the nozzle will deliver regardless of input pressure

• how many foot pounds of pressure must be used to properly tighten the nozzle

• How many gallons of oil per hour the nozzle will deliver at a given input pressure

• The stock number of the part

Improper combustion can lead to _______

• Excessive carbon monoxide production

• Smoke condition around furnace

• Wasted oil

• All of the above

The grade of fuel used in residential and light commercial units is______

• No. 12

• No. 2

• No. 4

• No. 6

An auxiliary tank and booster pump system is required if the oil supply is ___ below the oil burner pump.

• Any distance

• 5 feet or more

• 10 feet or more

• 15 feet or more

The CAD cell is a safety device that uses which of the following to prove ignition?

• Heat in the flue

• Heat in the combustion chamber

• Light in the combustion chamber

• Heat in the blast tube

To make combustion efficiency tests, a hole must be made____

• In the flue pipe after the draft control

• In the flue pipe before the draft control

• Over the fire at the observation door

• Under the draft hood

Nozzles can be cleaned to remove and carbonization by using a very fine wire brush.

• True

• False

For complete combustion and higher efficiency, the oil spray and the air flow off the blast tube both turn counter-clockwise.

• True

• False

Oil burner nozzles are designed and rated at 100 psig nozzle pressure.

• True

• False