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 any 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