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Nebraska Low Pressure Boiler Operator License EXAM
QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR – JUST RELEASED
Nebraska Low Pressure Boiler Operator License Exam
250 Practice Questions with Rationales
EXAM COVERAGE OVERVIEW (10 Key Points)
1. Regulatory Agency – The Nebraska Department of Labor, Boiler Inspection Program,
oversees boiler operator licensing. The State Boiler Safety Board administers the
certification examination .
2. License Levels – Nebraska offers two license tiers: Low Pressure Boiler
Operator and High Pressure Boiler Operator. This exam covers the low-pressure
qualification .
3. Licensing Requirements – Candidates must be at least 18 years old and complete a
training program plus supervised operating experience under a licensed operator .
4. Exam Details – The Nebraska Boiler Operator License Exam is a written test covering
boiler operation, safety, and state regulations. A score of 70% is required to pass .
5. Exam Fee – The exam application fee is **$50**. License renewal is also $50 every 2
years .
6. Key Reference Standards – The exam is based on the ASME Boiler and Pressure Vessel
Code (Section IV for low-pressure heating boilers, Section I for power boilers),
the National Board Inspection Code (NBIC), and Nebraska-specific regulations .
7. Low-Pressure Definition – A low-pressure steam boiler operates at 15 psig or less. A
low-pressure hot water boiler operates at 160 psig or less with a maximum temperature
of 250°F .
8. ASME Code Applicability – ASME Section IV governs the construction of low-pressure
heating boilers. ASME Section I covers power boilers (higher pressure). ASME CSD-
1 covers controls and safety devices for automatically fired boilers .
9. Safety Devices – Low-water cutoff (LWCO) devices are required on all steam boilers and
must be tested at least weekly. Safety relief valves prevent over-pressurization .
10. Boiler Water Chemistry – The recommended pH range for most steel boilers is 8.5 to
12.7 (alkaline). Low pH causes corrosion, while high pH can cause caustic
embrittlement .
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QUESTIONS 1-250
BOILER FUNDAMENTALS & BASIC THEORY (Questions 1-40)
1. What is the simple definition of a boiler?
A) A vessel that stores hot water for domestic use
B) A fired pressure vessel that generates steam or hot water
C) A tank that compresses air for industrial use
D) A heat exchanger that cools water for refrigeration
Correct Answer: B
Rationale: A boiler is a fired pressure vessel that produces steam or hot water by transferring
heat from combustion to water. It is classified as a pressure vessel because it operates under
pressure, making it subject to strict safety codes and regulations .
2. One boiler horsepower (BHP) is equal to how many pounds of steam per hour at 0 psig?
A) 30.5 lb/hr
B) 34.5 lb/hr
C) 40.0 lb/hr
D) 50.0 lb/hr
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Correct Answer: B
Rationale: One boiler horsepower equals 34.5 pounds of steam per hour at 0 psig. This
conversion is essential for capacity rating and load calculations in boiler operation .
3. A boiler operating at 150 psig is classified as which type of boiler?
A) Low-pressure boiler
B) Medium-pressure boiler
C) High-pressure boiler
D) Atmospheric boiler
Correct Answer: C
Rationale: Boilers operating above 15 psig for steam are generally classified as high-pressure
boilers. Low-pressure steam boilers operate at 15 psig or less .
4. What is the maximum allowable working pressure (MAWP) for a low-pressure steam
boiler?
A) 10 psig
B) 15 psig
C) 30 psig
D) 50 psig
Correct Answer: B
Rationale: Low-pressure steam boilers are limited to a MAWP of 15 psig. This distinguishes
them from high-pressure boilers, which operate at higher pressures .
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5. A low-pressure hot water boiler has a maximum allowable operating temperature of:
A) 200°F
B) 212°F
C) 250°F
D) 300°F
Correct Answer: C
Rationale: Low-pressure hot water boilers operate at a maximum pressure of 160 psig and a
maximum temperature of 250°F. Systems exceeding these limits are classified differently .
6. Which ASME code section governs the construction of low-pressure heating boilers?
A) ASME Section I
B) ASME Section III
C) ASME Section IV
D) ASME Section VIII
Correct Answer: C
Rationale: ASME Section IV covers the construction of heating boilars, including low-pressure
steam and hot-water units. Section I covers power boilers, Section III covers nuclear vessels, and
Section VIII covers pressure vessels .
7. In a fire-tube boiler, combustion gases:
A) Flow through tubes surrounded by water
B) Flow around tubes containing water
Nebraska Low Pressure Boiler Operator License EXAM
QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR – JUST RELEASED
Nebraska Low Pressure Boiler Operator License Exam
250 Practice Questions with Rationales
EXAM COVERAGE OVERVIEW (10 Key Points)
1. Regulatory Agency – The Nebraska Department of Labor, Boiler Inspection Program,
oversees boiler operator licensing. The State Boiler Safety Board administers the
certification examination .
2. License Levels – Nebraska offers two license tiers: Low Pressure Boiler
Operator and High Pressure Boiler Operator. This exam covers the low-pressure
qualification .
3. Licensing Requirements – Candidates must be at least 18 years old and complete a
training program plus supervised operating experience under a licensed operator .
4. Exam Details – The Nebraska Boiler Operator License Exam is a written test covering
boiler operation, safety, and state regulations. A score of 70% is required to pass .
5. Exam Fee – The exam application fee is **$50**. License renewal is also $50 every 2
years .
6. Key Reference Standards – The exam is based on the ASME Boiler and Pressure Vessel
Code (Section IV for low-pressure heating boilers, Section I for power boilers),
the National Board Inspection Code (NBIC), and Nebraska-specific regulations .
7. Low-Pressure Definition – A low-pressure steam boiler operates at 15 psig or less. A
low-pressure hot water boiler operates at 160 psig or less with a maximum temperature
of 250°F .
8. ASME Code Applicability – ASME Section IV governs the construction of low-pressure
heating boilers. ASME Section I covers power boilers (higher pressure). ASME CSD-
1 covers controls and safety devices for automatically fired boilers .
9. Safety Devices – Low-water cutoff (LWCO) devices are required on all steam boilers and
must be tested at least weekly. Safety relief valves prevent over-pressurization .
10. Boiler Water Chemistry – The recommended pH range for most steel boilers is 8.5 to
12.7 (alkaline). Low pH causes corrosion, while high pH can cause caustic
embrittlement .
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QUESTIONS 1-250
BOILER FUNDAMENTALS & BASIC THEORY (Questions 1-40)
1. What is the simple definition of a boiler?
A) A vessel that stores hot water for domestic use
B) A fired pressure vessel that generates steam or hot water
C) A tank that compresses air for industrial use
D) A heat exchanger that cools water for refrigeration
Correct Answer: B
Rationale: A boiler is a fired pressure vessel that produces steam or hot water by transferring
heat from combustion to water. It is classified as a pressure vessel because it operates under
pressure, making it subject to strict safety codes and regulations .
2. One boiler horsepower (BHP) is equal to how many pounds of steam per hour at 0 psig?
A) 30.5 lb/hr
B) 34.5 lb/hr
C) 40.0 lb/hr
D) 50.0 lb/hr
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Correct Answer: B
Rationale: One boiler horsepower equals 34.5 pounds of steam per hour at 0 psig. This
conversion is essential for capacity rating and load calculations in boiler operation .
3. A boiler operating at 150 psig is classified as which type of boiler?
A) Low-pressure boiler
B) Medium-pressure boiler
C) High-pressure boiler
D) Atmospheric boiler
Correct Answer: C
Rationale: Boilers operating above 15 psig for steam are generally classified as high-pressure
boilers. Low-pressure steam boilers operate at 15 psig or less .
4. What is the maximum allowable working pressure (MAWP) for a low-pressure steam
boiler?
A) 10 psig
B) 15 psig
C) 30 psig
D) 50 psig
Correct Answer: B
Rationale: Low-pressure steam boilers are limited to a MAWP of 15 psig. This distinguishes
them from high-pressure boilers, which operate at higher pressures .
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5. A low-pressure hot water boiler has a maximum allowable operating temperature of:
A) 200°F
B) 212°F
C) 250°F
D) 300°F
Correct Answer: C
Rationale: Low-pressure hot water boilers operate at a maximum pressure of 160 psig and a
maximum temperature of 250°F. Systems exceeding these limits are classified differently .
6. Which ASME code section governs the construction of low-pressure heating boilers?
A) ASME Section I
B) ASME Section III
C) ASME Section IV
D) ASME Section VIII
Correct Answer: C
Rationale: ASME Section IV covers the construction of heating boilars, including low-pressure
steam and hot-water units. Section I covers power boilers, Section III covers nuclear vessels, and
Section VIII covers pressure vessels .
7. In a fire-tube boiler, combustion gases:
A) Flow through tubes surrounded by water
B) Flow around tubes containing water
