LA Steam Engineer| 91
QUESTIONS| WITH COMPLETE
SOLUTIONS
Course
Steam Engineer
1. What is the primary function of a steam boiler?
A. Produce compressed air
B. Convert water into steam using heat
C. Cool industrial equipment
D. Generate electricity directly
Answer:
B. Convert water into steam using heat
Explanation:
A steam boiler transfers heat from fuel combustion or another heat source to water, producing
steam for heating, power generation, or industrial processes.
2. What is the purpose of a boiler safety valve?
Answer:
To automatically relieve excess pressure and prevent a boiler explosion.
Explanation:
Safety valves are critical safety devices that open when boiler pressure exceeds the preset limit.
3. Which boiler is commonly used in high-pressure applications?
A. Fire-tube boiler
B. Water-tube boiler
C. Electric heater
D. Hot water tank
Answer:
B. Water-tube boiler
,Explanation:
Water-tube boilers safely handle much higher pressures because water flows inside the tubes
while hot gases circulate around them.
4. Which boiler contains hot gases inside tubes surrounded by water?
A. Water-tube boiler
B. Fire-tube boiler
C. Once-through boiler
D. Coil boiler
Answer:
B. Fire-tube boiler
Explanation:
Fire-tube boilers are commonly used for lower-pressure applications due to their simpler
design.
5. What is boiler blowdown?
A. Starting the burner
B. Removing water containing dissolved solids and sludge from the boiler
C. Increasing steam pressure
D. Cooling the furnace
Answer:
B. Removing water containing dissolved solids and sludge from the boiler
Explanation:
Blowdown controls water chemistry and prevents scale buildup and corrosion.
6. Why is boiler water treatment necessary?
Answer:
To prevent scale, corrosion, foaming, and carryover while improving boiler efficiency and
extending equipment life.
Explanation:
Untreated water can damage boiler components and reduce heat transfer efficiency.
, 7. Which device indicates the water level inside a boiler?
A. Pressure gauge
B. Thermometer
C. Gauge glass (sight glass)
D. Draft gauge
Answer:
C. Gauge glass (sight glass)
Explanation:
Operators continuously monitor the water level through the gauge glass.
8. What should an operator do if the boiler water level becomes dangerously low?
A. Add cold water immediately.
B. Continue operating.
C. Shut down the boiler according to emergency procedures and investigate the cause.
D. Increase burner firing rate.
Answer:
C. Shut down the boiler according to emergency procedures and investigate the cause.
Explanation:
Adding water to an overheated boiler can cause catastrophic failure. Follow established
emergency shutdown procedures.
9. Which instrument measures boiler pressure?
A. Hydrometer
B. Pressure gauge
C. Pyrometer
D. Flow meter
Answer:
B. Pressure gauge
Explanation:
Pressure gauges provide continuous readings of boiler pressure.
QUESTIONS| WITH COMPLETE
SOLUTIONS
Course
Steam Engineer
1. What is the primary function of a steam boiler?
A. Produce compressed air
B. Convert water into steam using heat
C. Cool industrial equipment
D. Generate electricity directly
Answer:
B. Convert water into steam using heat
Explanation:
A steam boiler transfers heat from fuel combustion or another heat source to water, producing
steam for heating, power generation, or industrial processes.
2. What is the purpose of a boiler safety valve?
Answer:
To automatically relieve excess pressure and prevent a boiler explosion.
Explanation:
Safety valves are critical safety devices that open when boiler pressure exceeds the preset limit.
3. Which boiler is commonly used in high-pressure applications?
A. Fire-tube boiler
B. Water-tube boiler
C. Electric heater
D. Hot water tank
Answer:
B. Water-tube boiler
,Explanation:
Water-tube boilers safely handle much higher pressures because water flows inside the tubes
while hot gases circulate around them.
4. Which boiler contains hot gases inside tubes surrounded by water?
A. Water-tube boiler
B. Fire-tube boiler
C. Once-through boiler
D. Coil boiler
Answer:
B. Fire-tube boiler
Explanation:
Fire-tube boilers are commonly used for lower-pressure applications due to their simpler
design.
5. What is boiler blowdown?
A. Starting the burner
B. Removing water containing dissolved solids and sludge from the boiler
C. Increasing steam pressure
D. Cooling the furnace
Answer:
B. Removing water containing dissolved solids and sludge from the boiler
Explanation:
Blowdown controls water chemistry and prevents scale buildup and corrosion.
6. Why is boiler water treatment necessary?
Answer:
To prevent scale, corrosion, foaming, and carryover while improving boiler efficiency and
extending equipment life.
Explanation:
Untreated water can damage boiler components and reduce heat transfer efficiency.
, 7. Which device indicates the water level inside a boiler?
A. Pressure gauge
B. Thermometer
C. Gauge glass (sight glass)
D. Draft gauge
Answer:
C. Gauge glass (sight glass)
Explanation:
Operators continuously monitor the water level through the gauge glass.
8. What should an operator do if the boiler water level becomes dangerously low?
A. Add cold water immediately.
B. Continue operating.
C. Shut down the boiler according to emergency procedures and investigate the cause.
D. Increase burner firing rate.
Answer:
C. Shut down the boiler according to emergency procedures and investigate the cause.
Explanation:
Adding water to an overheated boiler can cause catastrophic failure. Follow established
emergency shutdown procedures.
9. Which instrument measures boiler pressure?
A. Hydrometer
B. Pressure gauge
C. Pyrometer
D. Flow meter
Answer:
B. Pressure gauge
Explanation:
Pressure gauges provide continuous readings of boiler pressure.
