661-LA 661 Louisiana (New Orleans) Second Class Stationary Boilers
Practice Exam 200 Questions with Correct Answers and Detailed
Explanations Based on ASME Boiler and Pressure Vessel Code, NBIC,
and City of New Orleans Requirements
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SECTION 1: BOILER TYPES AND COMPONENTS
Questions 1-25
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Question 1
What is the primary difference between a fire-tube boiler and a water-tube boiler?
A. Fire-tube boilers have water inside tubes; water-tube boilers have fire inside tubes
B. Fire-tube boilers have fire inside tubes; water-tube boilers have water inside tubes
C. There is no difference
D. Fire-tube boilers are used for steam only; water-tube for hot water only
Answer: B. Fire-tube boilers have fire inside tubes; water-tube boilers have water inside tubes
Rationale: In fire-tube boilers, hot combustion gases pass through tubes surrounded by water.
In water-tube boilers, water passes through tubes surrounded by hot gases .
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,Question 2
What is the function of a steam drum in a boiler?
A. Store feedwater
B. Separate steam from water
C. Collect sediment
D. Regulate pressure
Answer: B. Separate steam from water
Rationale: The steam drum provides space for steam to separate from water before leaving the
boiler .
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Question 3
What is the purpose of a mud drum in a boiler?
A. Collect sediment and scale
B. Store water
C. Produce steam
D. Regulate pressure
Answer: A. Collect sediment and scale
,Rationale: The mud drum collects sediment and impurities that settle out of the boiler water .
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Question 4
What is the function of a superheater?
A. Increase steam temperature above saturation
B. Increase steam pressure
C. Remove moisture from steam
D. Heat feedwater
Answer: A. Increase steam temperature above saturation
Rationale: A superheater raises steam temperature above its saturation point, improving
efficiency and reducing condensation in piping .
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Question 5
What is the function of an economizer?
A. Preheat feedwater using flue gases
B. Superheat steam
C. Remove moisture
D. Regulate pressure
, Answer: A. Preheat feedwater using flue gases
Rationale: Economizers recover heat from flue gases to preheat feedwater, improving boiler
efficiency .
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Question 6
What is the function of an air preheater?
A. Preheat combustion air using flue gases
B. Preheat feedwater
C. Superheat steam
D. Remove moisture
Answer: A. Preheat combustion air using flue gases
Rationale: Air preheaters recover heat from flue gases to warm incoming combustion air,
improving efficiency .
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Question 7
What is the purpose of a deaerator?
A. Remove dissolved gases from feedwater
Practice Exam 200 Questions with Correct Answers and Detailed
Explanations Based on ASME Boiler and Pressure Vessel Code, NBIC,
and City of New Orleans Requirements
---
SECTION 1: BOILER TYPES AND COMPONENTS
Questions 1-25
---
Question 1
What is the primary difference between a fire-tube boiler and a water-tube boiler?
A. Fire-tube boilers have water inside tubes; water-tube boilers have fire inside tubes
B. Fire-tube boilers have fire inside tubes; water-tube boilers have water inside tubes
C. There is no difference
D. Fire-tube boilers are used for steam only; water-tube for hot water only
Answer: B. Fire-tube boilers have fire inside tubes; water-tube boilers have water inside tubes
Rationale: In fire-tube boilers, hot combustion gases pass through tubes surrounded by water.
In water-tube boilers, water passes through tubes surrounded by hot gases .
---
,Question 2
What is the function of a steam drum in a boiler?
A. Store feedwater
B. Separate steam from water
C. Collect sediment
D. Regulate pressure
Answer: B. Separate steam from water
Rationale: The steam drum provides space for steam to separate from water before leaving the
boiler .
---
Question 3
What is the purpose of a mud drum in a boiler?
A. Collect sediment and scale
B. Store water
C. Produce steam
D. Regulate pressure
Answer: A. Collect sediment and scale
,Rationale: The mud drum collects sediment and impurities that settle out of the boiler water .
---
Question 4
What is the function of a superheater?
A. Increase steam temperature above saturation
B. Increase steam pressure
C. Remove moisture from steam
D. Heat feedwater
Answer: A. Increase steam temperature above saturation
Rationale: A superheater raises steam temperature above its saturation point, improving
efficiency and reducing condensation in piping .
---
Question 5
What is the function of an economizer?
A. Preheat feedwater using flue gases
B. Superheat steam
C. Remove moisture
D. Regulate pressure
, Answer: A. Preheat feedwater using flue gases
Rationale: Economizers recover heat from flue gases to preheat feedwater, improving boiler
efficiency .
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Question 6
What is the function of an air preheater?
A. Preheat combustion air using flue gases
B. Preheat feedwater
C. Superheat steam
D. Remove moisture
Answer: A. Preheat combustion air using flue gases
Rationale: Air preheaters recover heat from flue gases to warm incoming combustion air,
improving efficiency .
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Question 7
What is the purpose of a deaerator?
A. Remove dissolved gases from feedwater
