Combination burners use:

Combination burners use:

a. Two different gas burners arrangements
b. Two different pilot flames
c. Two different fuels
d. Two different air supplies





Answer: C

Premix Percentage is the another name for:

Premix Percentage is the another name for:

a. The quantity of gas in the air/gas mixture
b. Primary air
c. Secondary air
d. The quantity of gas in the secondary air

Answer: B

Which features do Motorized Gas Valves have? 1. Slow to open, quick to close 2. Quick to open, slow to close 3. Fail-safe 4. Spring and supply pressure to close 5. Spring and supply pressure to open

Which features do Motorized Gas Valves have?
1. Slow to open, quick to close
2. Quick to open, slow to close
3. Fail-safe
4. Spring and supply pressure to close
5. Spring and supply pressure to open

a. 1, 4
b. 1, 3, 4
c. 2, 3, 4
d. 2, 5
e. 1, 3, 5





Answer: B

To prevent a furnace puff, larger size solenoid type oil and gas valves usually have a delayed opening action so that it takes __ seconds to open the valve up wide, but they close instantly when de-energized.

To prevent a furnace puff, larger size solenoid type oil and gas valves usually have a delayed opening action so that it takes __ seconds to open the valve up wide, but they close instantly when de-energized.

a. 1 to 3
b. 4 to 5
c. 2 to 4
d. 5 to 7
e. 6 to 8





Answer: B

Diaphragm Gas Valve is popular as a control valve for?

Diaphragm Gas Valve is popular as a control valve for?

a. low capacity gas-fired heating boilers
b. high capacity gas-fired heating boilers
c. gas stoves
d. hot water heaters
e. C and D



Answer: A

Which pilots are ignited electrically by means of electrodes?

Which pilots are ignited electrically by means of electrodes?

a) interrupted
b) intermittent
c) continuous
d) all of the above
e) A and B

Answer: E

An ___ pilot is used to light off the main burner but does not burn throughout the burner "on" period.

An ___ pilot is used to light off the main burner but does not burn throughout the burner "on" period.

a) interrupted
b) intermittent
c) automatic
d) manual
e) continuous






Answer: A

A ____ pilot burns at all times and has to be manually ignited.

A ____ pilot burns at all times and has to be manually ignited. 

a) interrupted
b) intermittent
c) automatic
d) manual
e) continuous






Answer: E

The __________ pilot is most often used on small boilers.

The __________ pilot is most often used on small boilers.

a) interrupted
b) intermittent
c) automatic
d) manual
e) continuous





Answer: E

One of the advantages of the refractory (gas) burner is the

One of the advantages of the refractory (gas) burner is the

a) low cost
b) gas and air mixture is thoroughly preheated before it enters the furnace
c) flue gases are recirculated back to the furnace to increase the furnace temperature
d) flue gases are thoroughly post-heated before they leave the furnace
e) flame is directed to areas where it is needed the most

Answer: B

A refractory burner disadvantage is

A refractory burner disadvantage is

a) high initial cost
b) too much fuel preheat
c) low radiant heat
d) low combustion efficiency
e) overheating of boiler metal




Answer: A

When an atmospheric gas fired burner is burning fuel properly:

When an atmospheric gas fired burner is burning fuel properly:

a. It will have a blue, non-luminous flame
b. The furnace will pulsate
c. There will be no turbulence
d. It will have a long bright yellow flame
e. It will have perfect combustion.

Answer: A

An atmospheric premix burner has air entering around the flame that is termed:

An atmospheric premix burner has air entering around the flame that is termed:

a. Primary air
b. Secondary air
c. Atomizing air
d. Combustion air
e. Tertiary air




Answer: B

Atmospheric burners are used for:

Atmospheric burners are used for:

a. Gas stoves, hot water heaters, heating furnaces and many heating boilers
b. Ring type burners
c. Coal firing
d. Lowering the relative humidity in the combustion air
e. Preheating the combustion air




Answer: A

Large capacity burners:

Large capacity burners:

a. Require high flow on ignition
b. Are very safe relative to puff-back
c. Require only a small pilot flame
d. Should have minimum flow on ignition
e. Are too hazardous and not recommended




Answer: D

The main function of a gas burner is:

The main function of a gas burner is:

a. Atomization of the fuel
b. A source of ignition
c. Provide thorough mixing of the fuel and air
d. Regulation of the fuel flow
e. Air flow control






Answer: C

The Venturi tube in the atmospheric burner mixing head has a:

The Venturi tube in the atmospheric burner mixing head has a:

a. Gradually decreasing cross-sectional area
b. Gradually increasing cross-sectional area
c. Uniform cross-section throughout
d. Sharply increasing cross-sectional area
e. Series of internal ridges, to promote mixing






Answer: B

An atmospheric burner head which is very popular on heating boilers is the:

An atmospheric burner head which is very popular on heating boilers is the:

a. Refractory type
b. Star type
c. Ring type
d. Rectangular type
e. Ribbon ring type





Answer: D

A solenoid type fuel valve;

A solenoid type fuel valve;

a. Is held closed by fuel pressure
b. Always opens rapidly
c. Is held closed by electrical current
d. Closes slowly
e. Does not have positive shut-off






Answer: A

Which of the following is NOT a pilot for a gas burner?

Which of the following is NOT a pilot for a gas burner? 

a. Continuous
b. Intermittent
c. Manual
d. Interrupted
e. Standing






Answer: C