661-LA LOUISIANA SECOND CLASS
STATIONARY BOILER EXAM 2026 | 200
VERIFIED PRACTICE QUESTIONS &
DETAILED ANSWERS | NEW ORLEANS
BOILER CODE STUDY GUIDE
661-LA LOUISIANA SECOND CLASS STATIONARY BOILER EXAM 2026
200 VERIFIED PRACTICE QUESTIONS & DETAILED ANSWERS | NEW ORLEANS
BOILER CODE STUDY GUIDE
DOCUMENT OVERVIEW
• This comprehensive study guide contains 200 verified practice questions designed
to thoroughly prepare you for the Louisiana Second Class Stationary Boiler
certification exam, with detailed rationales explaining each correct answer based
on current New Orleans Boiler Code standards.
• Use this material by working through all questions systematically, reviewing
rationales carefully to understand underlying principles, and retesting weak areas
to ensure mastery of boiler operation, safety systems, maintenance, and regulatory
compliance.
QUESTIONS
QUESTION 1. What is the maximum allowable pressure for a second class
stationary boiler in Louisiana?
A) 50 PSI
B) 100 PSI
C) 150 PSI
D) 200 PSI
E) 300 PSI
✓ CORRECT ANSWER: C. 150 PSI
,Rationale: According to Louisiana boiler code, second class stationary boilers are
limited to a maximum working pressure of 150 PSI. This classification distinguishes
second class boilers from first class (which can exceed 150 PSI) and helps ensure
safe operation within appropriate vessel design limits.
QUESTION 2. Which type of boiler is classified as second class in Louisiana?
A) High-pressure water tube boilers only
B) Fire-tube boilers with pressure not exceeding 150 PSI
C) Only steam boilers operated above 150 PSI
D) Boilers used exclusively for heating only
E) Miniature boilers under 100 pounds of steel
✓ CORRECT ANSWER: B. Fire-tube boilers with pressure not exceeding 150 PSI
Rationale: Second class boilers in Louisiana are typically fire-tube boilers that
operate at pressures not exceeding 150 PSI and are used for both steam and hot
water applications. This classification encompasses most common industrial and
commercial boiler installations.
QUESTION 3. What must be installed on every second class boiler according to
Louisiana code?
A) Single pressure gauge only
B) Safety valve, pressure gauge, water level indicator, and blowdown valve
C) Two pumps and one compressor
D) Emergency shut-off valve and nothing else
E) Automatic feeding system exclusively
✓ CORRECT ANSWER: B. Safety valve, pressure gauge, water level indicator,
and blowdown valve
,Rationale: Louisiana boiler code mandates that every second class boiler must have
essential safety equipment including a properly sized safety valve, an accurate
pressure gauge, a water level indicator, and a means for blowdown. These
components are critical for safe operation and monitoring.
QUESTION 4. What is the primary purpose of a safety valve on a stationary
boiler?
A) To drain excess water from the boiler
B) To relieve pressure when it exceeds the maximum allowable working pressure
C) To indicate the current pressure inside the boiler
D) To regulate fuel flow into the combustion chamber
E) To control the temperature of steam produced
✓ CORRECT ANSWER: B. To relieve pressure when it exceeds the maximum
allowable working pressure
Rationale: The safety valve is the most critical safety device on any boiler. It
automatically opens and vents steam or water when pressure exceeds the
maximum allowable working pressure (MAWP), preventing dangerous over-
pressurization and potential explosion.
QUESTION 5. How often must safety valves on Louisiana second class boilers
be tested?
A) Once per year
B) Once every six months
C) Every thirty days
D) Quarterly (every three months)
E) Only when pressure exceeds 120 PSI
✓ CORRECT ANSWER: A. Once per year
, Rationale: Louisiana boiler code requires that safety valves on second class
stationary boilers be tested and certified at least once annually. This ensures the
valve will function properly during an emergency pressure situation.
QUESTION 6. What is the correct procedure when a safety valve lifts during
normal operation?
A) Immediately shut down the boiler
B) Reduce the load and investigate the cause of over-pressurization
C) Increase the pressure setting on the safety valve
D) Ignore it as this is normal operation
E) Replace the safety valve immediately
✓ CORRECT ANSWER: B. Reduce the load and investigate the cause of over-
pressurization
Rationale: If a safety valve lifts during normal operation, it indicates the pressure is
approaching or has reached the maximum allowable level. The operator should
reduce the boiler load (decrease firing) and determine why pressure is building
excessively, then take corrective action.
QUESTION 7. What does MAWP stand for in boiler terminology?
A) Maximum Allowable Water Pressure
B) Maximum Allowable Working Pressure
C) Most Accurate Working Pressure
D) Maximum Applied Working Performance
E) Mandatory Allowable Water Parameters
✓ CORRECT ANSWER: B. Maximum Allowable Working Pressure
STATIONARY BOILER EXAM 2026 | 200
VERIFIED PRACTICE QUESTIONS &
DETAILED ANSWERS | NEW ORLEANS
BOILER CODE STUDY GUIDE
661-LA LOUISIANA SECOND CLASS STATIONARY BOILER EXAM 2026
200 VERIFIED PRACTICE QUESTIONS & DETAILED ANSWERS | NEW ORLEANS
BOILER CODE STUDY GUIDE
DOCUMENT OVERVIEW
• This comprehensive study guide contains 200 verified practice questions designed
to thoroughly prepare you for the Louisiana Second Class Stationary Boiler
certification exam, with detailed rationales explaining each correct answer based
on current New Orleans Boiler Code standards.
• Use this material by working through all questions systematically, reviewing
rationales carefully to understand underlying principles, and retesting weak areas
to ensure mastery of boiler operation, safety systems, maintenance, and regulatory
compliance.
QUESTIONS
QUESTION 1. What is the maximum allowable pressure for a second class
stationary boiler in Louisiana?
A) 50 PSI
B) 100 PSI
C) 150 PSI
D) 200 PSI
E) 300 PSI
✓ CORRECT ANSWER: C. 150 PSI
,Rationale: According to Louisiana boiler code, second class stationary boilers are
limited to a maximum working pressure of 150 PSI. This classification distinguishes
second class boilers from first class (which can exceed 150 PSI) and helps ensure
safe operation within appropriate vessel design limits.
QUESTION 2. Which type of boiler is classified as second class in Louisiana?
A) High-pressure water tube boilers only
B) Fire-tube boilers with pressure not exceeding 150 PSI
C) Only steam boilers operated above 150 PSI
D) Boilers used exclusively for heating only
E) Miniature boilers under 100 pounds of steel
✓ CORRECT ANSWER: B. Fire-tube boilers with pressure not exceeding 150 PSI
Rationale: Second class boilers in Louisiana are typically fire-tube boilers that
operate at pressures not exceeding 150 PSI and are used for both steam and hot
water applications. This classification encompasses most common industrial and
commercial boiler installations.
QUESTION 3. What must be installed on every second class boiler according to
Louisiana code?
A) Single pressure gauge only
B) Safety valve, pressure gauge, water level indicator, and blowdown valve
C) Two pumps and one compressor
D) Emergency shut-off valve and nothing else
E) Automatic feeding system exclusively
✓ CORRECT ANSWER: B. Safety valve, pressure gauge, water level indicator,
and blowdown valve
,Rationale: Louisiana boiler code mandates that every second class boiler must have
essential safety equipment including a properly sized safety valve, an accurate
pressure gauge, a water level indicator, and a means for blowdown. These
components are critical for safe operation and monitoring.
QUESTION 4. What is the primary purpose of a safety valve on a stationary
boiler?
A) To drain excess water from the boiler
B) To relieve pressure when it exceeds the maximum allowable working pressure
C) To indicate the current pressure inside the boiler
D) To regulate fuel flow into the combustion chamber
E) To control the temperature of steam produced
✓ CORRECT ANSWER: B. To relieve pressure when it exceeds the maximum
allowable working pressure
Rationale: The safety valve is the most critical safety device on any boiler. It
automatically opens and vents steam or water when pressure exceeds the
maximum allowable working pressure (MAWP), preventing dangerous over-
pressurization and potential explosion.
QUESTION 5. How often must safety valves on Louisiana second class boilers
be tested?
A) Once per year
B) Once every six months
C) Every thirty days
D) Quarterly (every three months)
E) Only when pressure exceeds 120 PSI
✓ CORRECT ANSWER: A. Once per year
, Rationale: Louisiana boiler code requires that safety valves on second class
stationary boilers be tested and certified at least once annually. This ensures the
valve will function properly during an emergency pressure situation.
QUESTION 6. What is the correct procedure when a safety valve lifts during
normal operation?
A) Immediately shut down the boiler
B) Reduce the load and investigate the cause of over-pressurization
C) Increase the pressure setting on the safety valve
D) Ignore it as this is normal operation
E) Replace the safety valve immediately
✓ CORRECT ANSWER: B. Reduce the load and investigate the cause of over-
pressurization
Rationale: If a safety valve lifts during normal operation, it indicates the pressure is
approaching or has reached the maximum allowable level. The operator should
reduce the boiler load (decrease firing) and determine why pressure is building
excessively, then take corrective action.
QUESTION 7. What does MAWP stand for in boiler terminology?
A) Maximum Allowable Water Pressure
B) Maximum Allowable Working Pressure
C) Most Accurate Working Pressure
D) Maximum Applied Working Performance
E) Mandatory Allowable Water Parameters
✓ CORRECT ANSWER: B. Maximum Allowable Working Pressure
