COMPREHENSIVE BOILER AND STEAM SYSTEM
ENGINEERING: TYPES COMPONENT AND
OPERATIONS QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) Q7A 2027 |INSTANT
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1. What is the primary function of a boiler in a steam system?
A. To cool feedwater
B. To convert water into steam using heat
C. To remove oxygen from air
D. To condense steam
Correct answer: B. To convert water into steam using heat
Rationale: A boiler transfers heat to water, producing steam for
heating, power generation, or industrial processes.
2. Which component supplies heat to the water inside a
boiler?
A. Burner or furnace
B. Condenser
C. Feedwater pump
D. Economizer
Correct answer: A. Burner or furnace
Rationale: The burner or furnace releases heat from fuel
combustion, which is transferred to the boiler water.
,3. Which type of boiler has water flowing through tubes
surrounded by hot gases?
A. Fire-tube boiler
B. Water-tube boiler
C. Electric boiler
D. Condensing boiler
Correct answer: B. Water-tube boiler
Rationale: Water-tube boilers circulate water inside tubes
while hot combustion gases flow around the tubes.
4. In a fire-tube boiler, what flows through the tubes?
A. Feedwater
B. Steam only
C. Hot combustion gases
D. Condensate
Correct answer: C. Hot combustion gases
Rationale: Fire-tube boilers pass hot gases through tubes
surrounded by water.
5. What is the purpose of a boiler drum?
A. To store fuel
B. To separate steam from water
C. To cool combustion gases
D. To lubricate pumps
Correct answer: B. To separate steam from water
Rationale: In many water-tube boilers, the steam drum
provides space for steam-water separation.
,6. What is the main purpose of an economizer?
A. Heat combustion air
B. Preheat feedwater using flue-gas heat
C. Condense steam
D. Reduce fuel pressure
Correct answer: B. Preheat feedwater using flue-gas heat
Rationale: Economizers recover waste heat from flue gases to
raise feedwater temperature and improve efficiency.
7. What does a superheater do?
A. Converts steam into water
B. Raises saturated steam temperature above its saturation
temperature
C. Removes dissolved solids
D. Lowers boiler pressure
Correct answer: B. Raises saturated steam temperature above
its saturation temperature
Rationale: Superheating produces steam at a temperature
higher than the saturation temperature corresponding to its
pressure.
8. Why is superheated steam commonly used in steam
turbines?
A. It contains more liquid water
B. It reduces moisture formation during expansion
C. It has zero pressure
D. It prevents condensation in the feedwater tank
, Correct answer: B. It reduces moisture formation during
expansion
Rationale: Higher steam temperature helps keep turbine
exhaust moisture within acceptable limits during expansion.
9. What is the function of a steam separator?
A. Remove moisture from steam
B. Increase fuel pressure
C. Add chemicals to fuel
D. Cool feedwater
Correct answer: A. Remove moisture from steam
Rationale: Steam separators remove entrained water droplets
from steam.
10. Which instrument is commonly used to measure boiler
steam pressure?
A. Thermocouple
B. Pressure gauge
C. Flow meter
D. Level glass only
Correct answer: B. Pressure gauge
Rationale: A pressure gauge provides a direct indication of
steam or boiler pressure.
11. What is the purpose of a safety valve on a boiler?
A. Maintain fuel temperature
B. Prevent excessive pressure
ENGINEERING: TYPES COMPONENT AND
OPERATIONS QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) Q7A 2027 |INSTANT
DOWNLOAD PDF
1. What is the primary function of a boiler in a steam system?
A. To cool feedwater
B. To convert water into steam using heat
C. To remove oxygen from air
D. To condense steam
Correct answer: B. To convert water into steam using heat
Rationale: A boiler transfers heat to water, producing steam for
heating, power generation, or industrial processes.
2. Which component supplies heat to the water inside a
boiler?
A. Burner or furnace
B. Condenser
C. Feedwater pump
D. Economizer
Correct answer: A. Burner or furnace
Rationale: The burner or furnace releases heat from fuel
combustion, which is transferred to the boiler water.
,3. Which type of boiler has water flowing through tubes
surrounded by hot gases?
A. Fire-tube boiler
B. Water-tube boiler
C. Electric boiler
D. Condensing boiler
Correct answer: B. Water-tube boiler
Rationale: Water-tube boilers circulate water inside tubes
while hot combustion gases flow around the tubes.
4. In a fire-tube boiler, what flows through the tubes?
A. Feedwater
B. Steam only
C. Hot combustion gases
D. Condensate
Correct answer: C. Hot combustion gases
Rationale: Fire-tube boilers pass hot gases through tubes
surrounded by water.
5. What is the purpose of a boiler drum?
A. To store fuel
B. To separate steam from water
C. To cool combustion gases
D. To lubricate pumps
Correct answer: B. To separate steam from water
Rationale: In many water-tube boilers, the steam drum
provides space for steam-water separation.
,6. What is the main purpose of an economizer?
A. Heat combustion air
B. Preheat feedwater using flue-gas heat
C. Condense steam
D. Reduce fuel pressure
Correct answer: B. Preheat feedwater using flue-gas heat
Rationale: Economizers recover waste heat from flue gases to
raise feedwater temperature and improve efficiency.
7. What does a superheater do?
A. Converts steam into water
B. Raises saturated steam temperature above its saturation
temperature
C. Removes dissolved solids
D. Lowers boiler pressure
Correct answer: B. Raises saturated steam temperature above
its saturation temperature
Rationale: Superheating produces steam at a temperature
higher than the saturation temperature corresponding to its
pressure.
8. Why is superheated steam commonly used in steam
turbines?
A. It contains more liquid water
B. It reduces moisture formation during expansion
C. It has zero pressure
D. It prevents condensation in the feedwater tank
, Correct answer: B. It reduces moisture formation during
expansion
Rationale: Higher steam temperature helps keep turbine
exhaust moisture within acceptable limits during expansion.
9. What is the function of a steam separator?
A. Remove moisture from steam
B. Increase fuel pressure
C. Add chemicals to fuel
D. Cool feedwater
Correct answer: A. Remove moisture from steam
Rationale: Steam separators remove entrained water droplets
from steam.
10. Which instrument is commonly used to measure boiler
steam pressure?
A. Thermocouple
B. Pressure gauge
C. Flow meter
D. Level glass only
Correct answer: B. Pressure gauge
Rationale: A pressure gauge provides a direct indication of
steam or boiler pressure.
11. What is the purpose of a safety valve on a boiler?
A. Maintain fuel temperature
B. Prevent excessive pressure
