Stationary Engineer License Exam Prep Part 2 2026/2027 |
Questions & Correct Answers | Graded A+
1. In boiler design the acronym MAWP stands for:
Maximum allowable working pressure
Maximum allowable working power
Minimum allowable working pressure
Minimum allowable working power
2. A sudden drop in boiler steam pressure without a corresponding drop in
boiler water temperature could result in
no effect on boiler
an increase in surface tension
boiler explosion
loss of efficiency
3. Who is authorized to carry out repairs on a safety valve?
An engineer in training
Any maintenance worker
The boiler operator
A qualified technician
4. What is the name of the draft system that employs a fan to assist in the
movement of flue gases from the boiler to the chimney?
Induced draft system
Natural draft system
, Balanced draft system
Forced draft system
5. Describe the potential consequences of failing to remove condensate from
between the boiler stop valves during warmup.
Failing to remove condensate can lead to water hammer, which may
damage the boiler and disrupt operation.
It will improve the efficiency of the boiler.
It will reduce the need for maintenance.
It will have no significant impact on boiler performance.
6. How much water is required to produce a pound of steam?
One liter
Two gallons
One pound
One gallon
7. What is a potential consequence of a sudden drop in boiler steam pressure?
Increased efficiency
Steam leakage
Water hammer
Boiler explosion
8. What are the four essential systems needed for the operation of a steam
boiler?
, Cooling system, heating system, steam system, and water treatment
system.
Feedwater system, fuel system, steam system, and blowdown
system.
Feedwater system, pressure system, steam system, and safety system.
Fuel system, air supply system, steam system, and exhaust system.
9. Describe how dishing the steam and water drum contributes to the overall
safety of watertube boilers.
Dishing is primarily for aesthetic purposes.
Dishing allows for better heat distribution within the boiler.
Dishing helps in reducing the weight of the drum for easier installation.
Dishing the steam and water drum increases the strength of the
drum, allowing it to withstand higher pressures safely.
10. If an automatic nonreturn valve is incorrectly installed in the steam header
instead of at the boiler outlet, what potential issue could arise?
The steam pressure would be too low for operation.
Backflow of steam could occur, leading to safety hazards.
The steam quality would improve significantly.
The boiler would overheat and shut down.
11. No. 6 fuel oil for mechanical atomizing burners is usually heated to
500°F
150°F
300°F
, 100°F
12. What is the formula used to calculate the efficiency of a steam boiler?
Efficiency = (Heat absorbed by water / Heat supplied in fuel) x
100%
Efficiency = (Heat absorbed by water + Heat supplied in fuel) x 100%
Efficiency = (Heat supplied in fuel / Heat absorbed by water) x 100%
Efficiency = (Heat absorbed by water - Heat supplied in fuel) x 100%
13. What is the primary purpose of a safety valve in a steam boiler?
To enhance fuel efficiency
To regulate temperature
To control water levels
To prevent excessive pressure buildup
14. What is a potential hazard due to the large volume of water in firetube
boilers?
Slow reaction to load changes
Pressure failure leading to disastrous steam flash
Reduced efficiency
Difficulty in temperature control
15. If a safety valve connection is found to be improperly installed, what steps
should a qualified engineer take to rectify the situation?
Replace the entire boiler system immediately.
Questions & Correct Answers | Graded A+
1. In boiler design the acronym MAWP stands for:
Maximum allowable working pressure
Maximum allowable working power
Minimum allowable working pressure
Minimum allowable working power
2. A sudden drop in boiler steam pressure without a corresponding drop in
boiler water temperature could result in
no effect on boiler
an increase in surface tension
boiler explosion
loss of efficiency
3. Who is authorized to carry out repairs on a safety valve?
An engineer in training
Any maintenance worker
The boiler operator
A qualified technician
4. What is the name of the draft system that employs a fan to assist in the
movement of flue gases from the boiler to the chimney?
Induced draft system
Natural draft system
, Balanced draft system
Forced draft system
5. Describe the potential consequences of failing to remove condensate from
between the boiler stop valves during warmup.
Failing to remove condensate can lead to water hammer, which may
damage the boiler and disrupt operation.
It will improve the efficiency of the boiler.
It will reduce the need for maintenance.
It will have no significant impact on boiler performance.
6. How much water is required to produce a pound of steam?
One liter
Two gallons
One pound
One gallon
7. What is a potential consequence of a sudden drop in boiler steam pressure?
Increased efficiency
Steam leakage
Water hammer
Boiler explosion
8. What are the four essential systems needed for the operation of a steam
boiler?
, Cooling system, heating system, steam system, and water treatment
system.
Feedwater system, fuel system, steam system, and blowdown
system.
Feedwater system, pressure system, steam system, and safety system.
Fuel system, air supply system, steam system, and exhaust system.
9. Describe how dishing the steam and water drum contributes to the overall
safety of watertube boilers.
Dishing is primarily for aesthetic purposes.
Dishing allows for better heat distribution within the boiler.
Dishing helps in reducing the weight of the drum for easier installation.
Dishing the steam and water drum increases the strength of the
drum, allowing it to withstand higher pressures safely.
10. If an automatic nonreturn valve is incorrectly installed in the steam header
instead of at the boiler outlet, what potential issue could arise?
The steam pressure would be too low for operation.
Backflow of steam could occur, leading to safety hazards.
The steam quality would improve significantly.
The boiler would overheat and shut down.
11. No. 6 fuel oil for mechanical atomizing burners is usually heated to
500°F
150°F
300°F
, 100°F
12. What is the formula used to calculate the efficiency of a steam boiler?
Efficiency = (Heat absorbed by water / Heat supplied in fuel) x
100%
Efficiency = (Heat absorbed by water + Heat supplied in fuel) x 100%
Efficiency = (Heat supplied in fuel / Heat absorbed by water) x 100%
Efficiency = (Heat absorbed by water - Heat supplied in fuel) x 100%
13. What is the primary purpose of a safety valve in a steam boiler?
To enhance fuel efficiency
To regulate temperature
To control water levels
To prevent excessive pressure buildup
14. What is a potential hazard due to the large volume of water in firetube
boilers?
Slow reaction to load changes
Pressure failure leading to disastrous steam flash
Reduced efficiency
Difficulty in temperature control
15. If a safety valve connection is found to be improperly installed, what steps
should a qualified engineer take to rectify the situation?
Replace the entire boiler system immediately.
