Rotary burners operate with high-pressure gravity

In two stage oil pump the _______ stage draws completely air-free oil:

Fuel Pump fail to prime when Suction inlet vacuum is greater than _______ of vacuum

A _______ stack thermometer is generally used to measure the flue gas temperature in oil heating system:

Delayed ignition is mainly traced to a problem with which of the following:

The spray angle of oil from  burner nozzle will generally range from ______:

Air enters the heating system in following order:

A ______ carbon dioxide content is usually caused by insufficient draft or an overfired burner

Malfunctions in the heating system cause primary safety control to _______ electrical resistance across the cell until the burner is automatically shut off.

The advantage of the _______ of oil spray pattern  is more stable operating under the same conditions and at the same flow rate.

If the oil tank is located above the burner, and the oil is supplied by gravity flow, the vacuum gauge must show a reading of _______:

Fuel pump is located on the left side of the oil burner

Which of the following oil burner has relatively high operating cost

Which of the following is used to ignite the fuel oil in the heating system:

______ gives a twisting motion to the air stream just before it strikes the oil spray