On a two fixed capacity nozzle system both burners are lit when the system is:

On a two fixed capacity nozzle system both burners are lit when the system is:

a. Low fire
b. Initial start up
c. High fire
d. On-off cycling






Answer: C

The purpose of a cut off valve is to:

The purpose of a cut off valve is to:

a. Prevents too low of an oil pressure to supply the burner
b. Cut off the burner is to high
c. Relieve the pressure of the fuel in an over-pressure situation
d. None of the above





Answer: A

The purpose of pressure relief valve on a constant capacity fuel supply is to:

The purpose of pressure relief valve on a constant capacity fuel supply is to:

a. Relieve the pressure from the oil line any discharge it to atmosphere
b. Re-direct fuel oil that above the set pressure back to the tank or strainer
c. Protect the oil tank from rupturing
d. All the above





Answer: B

A modulating capacity mechanical atomizing oil burner is also called an?

A modulating capacity mechanical atomizing oil burner is also called an?

a. Constant capacity
b. Steam atomized
c. Wide range atomizer
d. Centrifugal Cup

Answer: C

An air atomizing compressor is usually

An air atomizing compressor is usually

a) a variable displacement type
b) a centrifugal type
c) an axial type
d) a positive displacement type
e) a regenerative type

Answer: D

A time delay oil valve

A time delay oil valve

a) opens when the pump starts
b) opens once ignition is verified
c) opens on flame failure
d) is located on the return line
e) is upstream of the pressure regulating valve

Answer: B

A relief valve is placed on the discharge of a fuel oil pump

A relief valve is placed on the discharge of a fuel oil pump

a) because the pump is a dynamic type
b) so burner design pressure is not exceeded
c) so burner capacity is maintained
d) to prevent pump rupture
e) to prevent over-firing of the boiler



Answer: B

Oil burners can be divided into three classes:

Oil burners can be divided into three classes:

1. air and steam atomizing burners
2. mechanical or pressure atomizing burners
3. centrifugal or rotary cup burners
4. atmospherical pressure burners
5. gravitational pressure burners


a) 1, 2, and 3
b) 1, 2, and 4
c) 2, 3, and 4
d) 3, 4, and 5
e) 2, 3, and 5




Answer: A

The reducing of oil into very small particles is termed

The reducing of oil into very small particles is termed

a) fluidization
b) fractionation
c) turbulence
d) atomization
e) distillation





Answer: D

An atomizing air compressor is usually:

An atomizing air compressor is usually:

a. A variable displacement type
b. A centrifugal type
c. An axial type
d. A small, rotary air compressor
e. A regenerative type





Answer: D

When using mechanical fuel oil atomization:

When using mechanical fuel oil atomization:

a. 70 kPa steam pressure is required at the burner
b. Dry saturated steam or superheated steam should be used
c. High pump pressure is required
d. Steam pressure is required to keep the bypass open
e. 35 to 40 kPa oil pressure is required

Answer: C

The design capacity of a constant capacity mechanical atomizer is a function of:

The design capacity of a constant capacity mechanical atomizer is a function of:

a. Orifice size
b. Pump speed
c. Pump size
d. Supply pressure
e. Oil viscosity




Answer: E

The pressure range for pressure-atomizing burners fired with light fuel oil is approximately:

The pressure range for pressure-atomizing burners fired with light fuel oil is approximately:

a. 50 to 100 kPa
b. 150 to 250 kPa
c. 300 to 550 kPa
d. 550 to 700 kPa
e. 700 to 850 kPa







Answer: D

The compressed air used as atomizing air in the air atomizing oil burner is also called:

The compressed air used as atomizing air in the air atomizing oil burner is also called:

a. Secondary air
b. Primary air
c. Pre-mixed air
d. Combustion air
e. Post-compressed air





Answer: B

The two basic varieties of mechanical atomizing oil burners are the:

The two basic varieties of mechanical atomizing oil burners are the:

a. Variable capacity and modulating burners
b. Constant and variable capacity burners
c. Modulating and cluster burners
d. Rotary and reciprocating cup burners
e. light oil and heavy oil burners





Answer: B

To prevent the possibility of a furnace explosion, it is important that the furnace is _____ before the igniter is energized and fuel is supplied to the burner nozzle(s).

To prevent the possibility of a furnace explosion, it is important that the furnace is _____ before the igniter is energized and fuel is supplied to the burner nozzle(s).

a. Pre-heated
b. Post-heated
c. Purged
d. Cooled
e. Pressurized






Answer: C

When a greater than normal amount of combustible mixture is ignited, the result may be:

When a greater than normal amount of combustible mixture is ignited, the result may be:

a. A boiler explosion
b. A puff-back
c. A negative furnace pressure
d. A too rapid boiler warm-up
e. Liquid fuel entering the furnace





Answer: B

Intermediate and high fire burner nozzles have higher capacities than the primary burner nozzle:

Intermediate and high fire burner nozzles have higher capacities than the primary burner nozzle:

a. To give greater firing variations
b. To prevent pressure surges
c. To prevent ignition puff-backs
d. Because of the pump being of the positive displacement type
e. To allow slower boiler warm-ups





Answer: E

A multi-burner cluster has secondary and tertiary nozzles ignited by:

A multi-burner cluster has secondary and tertiary nozzles ignited by:

a. An igniter spark
b. An intermittent pilot flame
c. An interrupted pilot
d. The primary burner
e. A continuous pilot





Answer: D

Before being pumped to the burner, heavy oils are heated to approximately:

Before being pumped to the burner, heavy oils are heated to approximately:

a. 203°C
b. 95°C
c. 115°C
d. 75°C
e. 150°C

Answer: B