Louisiana (New Orleans) Second Class Stationary Boiler
Certification Exam (661-LA)
Louisiana (New Orleans) Second Class Stationary Boiler
Certification Exam (661-LA)
Most Tested Coverage Areas (10 Numbered List):
1. Boiler Water Treatment, Scale Prevention, and Corrosion Control
2. Safety Valves, Pressure Relief Devices, and Overpressure Protection
3. Low-Water Conditions, Water Level Indication, and Emergency Response
4. Blowdown Procedures (Bottom and Surface) and Dissolved Solids Control
5. ASME Code Requirements for Boiler Construction and Inspection
6. Boiler Fittings, Appurtenances, and Instrumentation
7. Combustion, Fuels, Burners, and Draft Systems
8. Boiler Types (Fire-Tube vs. Water-Tube) and Construction Details
9. Steam Purity, Carryover, Priming, and Foaming
10. New Orleans/661-LA Regulatory Requirements, Licensing, and Administration
,Louisiana (New Orleans) Second Class Stationary Boiler
Certification Exam (661-LA)
1. The primary purpose of boiler water treatment in stationary boiler systems is most
accurately described as which of the following operational objectives?
A. Increasing water hardness to improve heat transfer
B. Preventing scale formation and corrosion of metal surfaces
C. Enhancing the combustion efficiency of fuel oil
D. Reducing the operating pressure of the boiler
Answer: B
A: Increasing hardness is undesirable; hardness causes scale.
B: Correct. Water treatment targets scale and corrosion prevention . 1
C: Combustion efficiency is a burner/fuel concern, not water treatment.
D: Operating pressure is set by load and safety valve settings.
2. Which chemical agent is commonly introduced into boiler feedwater specifically to
scavenge dissolved oxygen and thereby prevent pitting corrosion?
,A. Sodium chloride
B. Hydrazine
C. Calcium carbonate
D. Sodium hydroxide
Answer: B
A: Sodium chloride is a salt and contributes to dissolved solids.
B: Correct. Hydrazine reacts with dissolved oxygen . 1
C: Calcium carbonate contributes to hardness and scale.
D: Sodium hydroxide adjusts pH but is not primarily an oxygen scavenger.
3. What is the fundamental safety purpose of a spring-loaded safety valve installed on
a steam boiler?
A. To control the operating pressure at the burner
B. To automatically relieve excess pressure before rupture occurs
C. To regulate the feedwater level in the drum
D. To vent non-condensable gases during cold startup
Answer: B
, A: Operating pressure is controlled by the burner management system.
B: Correct. Safety valves protect against overpressurization . 1 8
C: Water level is controlled by feedwater regulators.
D: Venting gases is a separate startup procedure.
4. According to ASME Code requirements, a boiler with more than 500 square feet of
heating surface must be equipped with at least how many safety valves?
A. One
B. Two
C. Three
D. Four
Answer: B
A: One is insufficient for larger heating surfaces.
B: Correct. ASME requires at least two for redundancy . 1
C: Three exceeds the minimum but is not the required minimum.
D: Four is not the standard minimum.
Certification Exam (661-LA)
Louisiana (New Orleans) Second Class Stationary Boiler
Certification Exam (661-LA)
Most Tested Coverage Areas (10 Numbered List):
1. Boiler Water Treatment, Scale Prevention, and Corrosion Control
2. Safety Valves, Pressure Relief Devices, and Overpressure Protection
3. Low-Water Conditions, Water Level Indication, and Emergency Response
4. Blowdown Procedures (Bottom and Surface) and Dissolved Solids Control
5. ASME Code Requirements for Boiler Construction and Inspection
6. Boiler Fittings, Appurtenances, and Instrumentation
7. Combustion, Fuels, Burners, and Draft Systems
8. Boiler Types (Fire-Tube vs. Water-Tube) and Construction Details
9. Steam Purity, Carryover, Priming, and Foaming
10. New Orleans/661-LA Regulatory Requirements, Licensing, and Administration
,Louisiana (New Orleans) Second Class Stationary Boiler
Certification Exam (661-LA)
1. The primary purpose of boiler water treatment in stationary boiler systems is most
accurately described as which of the following operational objectives?
A. Increasing water hardness to improve heat transfer
B. Preventing scale formation and corrosion of metal surfaces
C. Enhancing the combustion efficiency of fuel oil
D. Reducing the operating pressure of the boiler
Answer: B
A: Increasing hardness is undesirable; hardness causes scale.
B: Correct. Water treatment targets scale and corrosion prevention . 1
C: Combustion efficiency is a burner/fuel concern, not water treatment.
D: Operating pressure is set by load and safety valve settings.
2. Which chemical agent is commonly introduced into boiler feedwater specifically to
scavenge dissolved oxygen and thereby prevent pitting corrosion?
,A. Sodium chloride
B. Hydrazine
C. Calcium carbonate
D. Sodium hydroxide
Answer: B
A: Sodium chloride is a salt and contributes to dissolved solids.
B: Correct. Hydrazine reacts with dissolved oxygen . 1
C: Calcium carbonate contributes to hardness and scale.
D: Sodium hydroxide adjusts pH but is not primarily an oxygen scavenger.
3. What is the fundamental safety purpose of a spring-loaded safety valve installed on
a steam boiler?
A. To control the operating pressure at the burner
B. To automatically relieve excess pressure before rupture occurs
C. To regulate the feedwater level in the drum
D. To vent non-condensable gases during cold startup
Answer: B
, A: Operating pressure is controlled by the burner management system.
B: Correct. Safety valves protect against overpressurization . 1 8
C: Water level is controlled by feedwater regulators.
D: Venting gases is a separate startup procedure.
4. According to ASME Code requirements, a boiler with more than 500 square feet of
heating surface must be equipped with at least how many safety valves?
A. One
B. Two
C. Three
D. Four
Answer: B
A: One is insufficient for larger heating surfaces.
B: Correct. ASME requires at least two for redundancy . 1
C: Three exceeds the minimum but is not the required minimum.
D: Four is not the standard minimum.
