Stationary Engineer
License Exam
1.
Question: What is the primary purpose of a safety valve on a boiler?
Answer: To automatically release excess steam pressure to prevent explosions.
2.
Question: According to ASME Code, what is the maximum allowable accumulation of
pressure above the maximum allowable working pressure (MAWP) when the safety
valve is discharging?
,Answer: 6% above MAWP.
3.
Question: What is the function of a deaerator in a boiler system?
Answer: To remove dissolved oxygen and carbon dioxide from feedwater, preventing
corrosion.
4.
Question: What device measures draft in a boiler furnace?
Answer: A draft gauge or manometer.
5.
Question: What type of pump is most commonly used for boiler feedwater service?
Answer: A centrifugal pump.
6.
Question: When starting a steam turbine, why must it be warmed up slowly?
Answer: To prevent thermal shock and uneven expansion that can damage the
turbine.
7.
Question: What is the purpose of a boiler economizer?
Answer: To recover heat from flue gases to preheat boiler feedwater, improving
efficiency.
8.
, Question: How often must a low-water fuel cut-off on a boiler be tested?
Answer: At least once per shift (per ASME and state regulations).
9.
Question: What is the difference between a fire-tube and water-tube boiler?
Answer:
Fire-tube: Hot gases pass through tubes surrounded by water.
Water-tube: Water circulates inside tubes heated externally by combustion gases.
10.
Question: What is cavitation in a pump?
Answer: The formation and collapse of vapor bubbles in liquid due to low pressure,
which can damage the pump impeller.
11.
Question: Which device prevents backflow of boiler water into the feedwater
supply?
Answer: A check valve or backflow preventer.
12.
Question: What type of current is typically used for large motor-driven equipment in
boiler plants?
Answer: Three-phase alternating current (AC).
13.
License Exam
1.
Question: What is the primary purpose of a safety valve on a boiler?
Answer: To automatically release excess steam pressure to prevent explosions.
2.
Question: According to ASME Code, what is the maximum allowable accumulation of
pressure above the maximum allowable working pressure (MAWP) when the safety
valve is discharging?
,Answer: 6% above MAWP.
3.
Question: What is the function of a deaerator in a boiler system?
Answer: To remove dissolved oxygen and carbon dioxide from feedwater, preventing
corrosion.
4.
Question: What device measures draft in a boiler furnace?
Answer: A draft gauge or manometer.
5.
Question: What type of pump is most commonly used for boiler feedwater service?
Answer: A centrifugal pump.
6.
Question: When starting a steam turbine, why must it be warmed up slowly?
Answer: To prevent thermal shock and uneven expansion that can damage the
turbine.
7.
Question: What is the purpose of a boiler economizer?
Answer: To recover heat from flue gases to preheat boiler feedwater, improving
efficiency.
8.
, Question: How often must a low-water fuel cut-off on a boiler be tested?
Answer: At least once per shift (per ASME and state regulations).
9.
Question: What is the difference between a fire-tube and water-tube boiler?
Answer:
Fire-tube: Hot gases pass through tubes surrounded by water.
Water-tube: Water circulates inside tubes heated externally by combustion gases.
10.
Question: What is cavitation in a pump?
Answer: The formation and collapse of vapor bubbles in liquid due to low pressure,
which can damage the pump impeller.
11.
Question: Which device prevents backflow of boiler water into the feedwater
supply?
Answer: A check valve or backflow preventer.
12.
Question: What type of current is typically used for large motor-driven equipment in
boiler plants?
Answer: Three-phase alternating current (AC).
13.
