ALBERTA BOILER OPERATOR (SECOND CLASS)
CERTIFICATION EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
1. What is the main reason for treating boiler feedwater?
a) To increase efficiency
b) To reduce fuel consumption
c) To prevent scale and corrosion
d) To raise steam pressure
Untreated water can cause scaling and corrosion, which reduces
efficiency and can damage the boiler.
2. What is the primary function of a boiler economizer?
a) To increase steam pressure
b) To recover heat from flue gases
c) To feed water into the boiler
d) To remove impurities from water
An economizer captures residual heat from flue gases and uses it
to preheat the feedwater, improving efficiency.
3. What is the typical range for boiler water pH to prevent
corrosion?
a) 4.0–5.0
b) 5.0–6.0
c) 10.5–11.5
d) 7.0–8.0
Boiler water is kept alkaline to prevent corrosion of metal
surfaces.
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, 4. What is carryover in a boiler?
a) Water that enters the superheater
b) Water droplets entrained in steam
c) Steam leaking from the safety valve
d) Excess feedwater
Carryover occurs when water is carried into the steam, which can
cause damage to turbines and other equipment.
5. Which of the following is a symptom of foaming in a boiler?
a) High fuel consumption
b) Sudden water level rise in the gauge glass
c) Low steam pressure
d) Slow start-up
Foaming creates bubbles in the water, causing the water level to
appear higher and potentially causing carryover.
6. The purpose of a boiler blowdown is to:
a) Increase steam production
b) Reduce fuel usage
c) Remove sludge and impurities from the water
d) Lower the water temperature
Blowdown removes concentrated impurities, preventing scale
formation and maintaining water quality.
7. Which fuel has the highest calorific value per unit?
a) Wood
b) Oil
c) Natural gas
d) Coal
https://www.stuvia.com/user/MBOFFIN
, Natural gas produces more energy per unit volume than most
other common boiler fuels.
8. What is the main advantage of a forced draft fan?
a) Reduces fuel consumption
b) Removes flue gases
c) Supplies air under pressure to the furnace
d) Controls water level
Forced draft fans push air into the furnace to maintain proper
combustion and efficiency.
9. In a boiler, what does the term “superheater” refer to?
a) Device to remove impurities from water
b) Section that heats steam above its saturation temperature
c) Part that controls water flow
d) Combustion chamber
Superheaters increase the temperature of steam beyond its
boiling point, improving efficiency in turbines.
10. What is the function of a deaerator in a boiler system?
a) To heat water for circulation
b) To filter impurities
c) To remove dissolved gases like oxygen and carbon dioxide
d) To control steam pressure
Dissolved gases can cause corrosion, and deaerators remove them
before water enters the boiler.
11. Which of the following is a common cause of boiler
tube failure?
a) Overfeeding water
https://www.stuvia.com/user/MBOFFIN
CERTIFICATION EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
1. What is the main reason for treating boiler feedwater?
a) To increase efficiency
b) To reduce fuel consumption
c) To prevent scale and corrosion
d) To raise steam pressure
Untreated water can cause scaling and corrosion, which reduces
efficiency and can damage the boiler.
2. What is the primary function of a boiler economizer?
a) To increase steam pressure
b) To recover heat from flue gases
c) To feed water into the boiler
d) To remove impurities from water
An economizer captures residual heat from flue gases and uses it
to preheat the feedwater, improving efficiency.
3. What is the typical range for boiler water pH to prevent
corrosion?
a) 4.0–5.0
b) 5.0–6.0
c) 10.5–11.5
d) 7.0–8.0
Boiler water is kept alkaline to prevent corrosion of metal
surfaces.
https://www.stuvia.com/user/MBOFFIN
, 4. What is carryover in a boiler?
a) Water that enters the superheater
b) Water droplets entrained in steam
c) Steam leaking from the safety valve
d) Excess feedwater
Carryover occurs when water is carried into the steam, which can
cause damage to turbines and other equipment.
5. Which of the following is a symptom of foaming in a boiler?
a) High fuel consumption
b) Sudden water level rise in the gauge glass
c) Low steam pressure
d) Slow start-up
Foaming creates bubbles in the water, causing the water level to
appear higher and potentially causing carryover.
6. The purpose of a boiler blowdown is to:
a) Increase steam production
b) Reduce fuel usage
c) Remove sludge and impurities from the water
d) Lower the water temperature
Blowdown removes concentrated impurities, preventing scale
formation and maintaining water quality.
7. Which fuel has the highest calorific value per unit?
a) Wood
b) Oil
c) Natural gas
d) Coal
https://www.stuvia.com/user/MBOFFIN
, Natural gas produces more energy per unit volume than most
other common boiler fuels.
8. What is the main advantage of a forced draft fan?
a) Reduces fuel consumption
b) Removes flue gases
c) Supplies air under pressure to the furnace
d) Controls water level
Forced draft fans push air into the furnace to maintain proper
combustion and efficiency.
9. In a boiler, what does the term “superheater” refer to?
a) Device to remove impurities from water
b) Section that heats steam above its saturation temperature
c) Part that controls water flow
d) Combustion chamber
Superheaters increase the temperature of steam beyond its
boiling point, improving efficiency in turbines.
10. What is the function of a deaerator in a boiler system?
a) To heat water for circulation
b) To filter impurities
c) To remove dissolved gases like oxygen and carbon dioxide
d) To control steam pressure
Dissolved gases can cause corrosion, and deaerators remove them
before water enters the boiler.
11. Which of the following is a common cause of boiler
tube failure?
a) Overfeeding water
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