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STATIONARY ENGINEER LICENSE
PRACTICE GRADE 4 EXAM 2025 BRAND
NEW ACTUAL EXAM WITH ANSWERS.
1. How is sludge and sediment removed from the gauge glass
and water column - correct answer -blowdown
2. What are bottom blowdown valves used for - correct answer -to
release water from the bottom of the boiler
3. Describe the bottom blowdown valve order - correct answer -
the valve closest to the boiler is always opened first and closed
last
4. What is the purpose of the bottom blowdown - correct answer -
water level control, sludge and sediment removal, and dumping
the boiler
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5. Name 3 components that prevent damage to the sewer system
- correct answer -a blowdown tank, blowdown separator, and
heat exchanger
6. When should a boiler never be dumped - correct answer -when
hot
7. What is a fusible plug - correct answer -a warning device used
to indicate extreme overheating of the boiler from a low water
condition
8. Where is the fusible plug usually located on a Scotch Marine
Boiler - correct answer -in the top of the combustion chamber
or in the rear tube sheet above the highest row of tubes
9. How often should fusible plugs be replaced - correct answer -
annually during boiler inspection
10. What size is the boiler vent line - correct answer -half inch or
three quarter inch piping
STATIONARY ENGINEER LICENSE
PRACTICE GRADE 4 EXAM 2025 BRAND
NEW ACTUAL EXAM WITH ANSWERS.
1. How is sludge and sediment removed from the gauge glass
and water column - correct answer -blowdown
2. What are bottom blowdown valves used for - correct answer -to
release water from the bottom of the boiler
3. Describe the bottom blowdown valve order - correct answer -
the valve closest to the boiler is always opened first and closed
last
4. What is the purpose of the bottom blowdown - correct answer -
water level control, sludge and sediment removal, and dumping
the boiler
, Page | 2
5. Name 3 components that prevent damage to the sewer system
- correct answer -a blowdown tank, blowdown separator, and
heat exchanger
6. When should a boiler never be dumped - correct answer -when
hot
7. What is a fusible plug - correct answer -a warning device used
to indicate extreme overheating of the boiler from a low water
condition
8. Where is the fusible plug usually located on a Scotch Marine
Boiler - correct answer -in the top of the combustion chamber
or in the rear tube sheet above the highest row of tubes
9. How often should fusible plugs be replaced - correct answer -
annually during boiler inspection
10. What size is the boiler vent line - correct answer -half inch or
three quarter inch piping
