Maryland Stationary Engineer Exam (2026/2027) UPDATE|EXAM
QUESTIONS WITH MULTIPLE CHOICES |VERIFIED & REVISED
ANSWERS (NEW)!!
1. If a furnace is operating at positive pressure, what potential issues could
arise?
Increased fuel efficiency
Higher combustion temperatures
Improved airflow
Escape of combustion gases
2. If a boiler experiences an imbalance in draft, what immediate action should
be taken to restore proper operation?
Decrease the water level in the boiler.
Turn off the boiler completely.
Adjust the draft fans to correct airflow.
Increase the fuel supply to the boiler.
3. Describe the role of the center eye of the impeller in a horizontal split case
centrifugal pump.
The center eye of the impeller regulates the temperature of the fluid.
The center eye of the impeller is where the fluid enters the pump,
creating suction.
The center eye of the impeller is responsible for fuel management.
The center eye of the impeller is where the fluid exits the pump under
pressure.
,4. If a reciprocating pump's suction valve is malfunctioning and allows backflow,
what impact would this have on the pump's operation?
It would reduce the pump's efficiency and potentially cause
cavitation.
It would improve the overall flow rate of the system.
It would increase the pump's output pressure significantly.
It would have no effect on the pump's operation.
5. What are the two main classifications used to rate coal?
Rank and grade
Size and weight
Color and texture
Type and quality
6. Describe the significance of rank and grade in the context of coal evaluation.
Rank and grade are interchangeable terms used to describe coal's
physical appearance.
Rank is determined by the coal's color, while grade is based on its size.
Rank refers to the degree of metamorphism of coal, while grade
indicates the quality based on its carbon content and heating value.
Rank measures the coal's moisture content, and grade assesses its ash
content.
7. Describe the role of a combination draft in maintaining boiler efficiency.
A combination draft is used to increase the temperature of the boiler.
, A combination draft helps maintain optimal airflow, which is crucial
for efficient combustion and safe boiler operation.
A combination draft solely focuses on reducing fuel consumption.
A combination draft eliminates the need for safety measures in boiler
operation.
8. The most desirable type of coal is:
Anthracite
Sub-bituminous coal
Lignite
Bituminous coal
9. Fuel oil atomizers are used in boilers to ___ _.
control the amount of air entering the furnace
break fuel oil into a fine spray
mix air and fuel together
control the temperature of fuel entering the furnace
10. If a stationary engineer discovers that the vent line of an open feedwater
heater is clogged, what immediate action should they take to ensure optimal
operation?
Clear the vent line to reduce the level of air and non-condensables.
Increase the feedwater flow rate to compensate for the clog.
Ignore the clog as it does not affect operation.
Increase the temperature of the feedwater to counteract the clog.
, 11. What is the primary application of thermostatic type steam traps?
To regulate steam pressure
To measure steam flow
To control fuel supply
To remove condensate from steam systems
12. Describe how increasing temperature and fuel supply affects steam pressure
in a boiler system.
Increasing water level reduces steam pressure by diluting the steam.
Increasing temperature and fuel supply raises the energy available
for steam production, thus increasing steam pressure.
Increasing temperature decreases steam pressure due to thermal
expansion.
Increasing fuel supply without temperature adjustment has no effect
on steam pressure.
13. Describe the significance of the second number in the designation of a
reciprocating pump, such as in a 4x2x4 pump.
The second number indicates the length of the stroke of the pump.
The second number indicates the pump's flow rate.
The second number indicates the maximum pressure the pump can
handle.
The second number indicates the diameter of the discharge pipe.
14. What is the common technique employed to atomize fuel oil in combustion
systems?
QUESTIONS WITH MULTIPLE CHOICES |VERIFIED & REVISED
ANSWERS (NEW)!!
1. If a furnace is operating at positive pressure, what potential issues could
arise?
Increased fuel efficiency
Higher combustion temperatures
Improved airflow
Escape of combustion gases
2. If a boiler experiences an imbalance in draft, what immediate action should
be taken to restore proper operation?
Decrease the water level in the boiler.
Turn off the boiler completely.
Adjust the draft fans to correct airflow.
Increase the fuel supply to the boiler.
3. Describe the role of the center eye of the impeller in a horizontal split case
centrifugal pump.
The center eye of the impeller regulates the temperature of the fluid.
The center eye of the impeller is where the fluid enters the pump,
creating suction.
The center eye of the impeller is responsible for fuel management.
The center eye of the impeller is where the fluid exits the pump under
pressure.
,4. If a reciprocating pump's suction valve is malfunctioning and allows backflow,
what impact would this have on the pump's operation?
It would reduce the pump's efficiency and potentially cause
cavitation.
It would improve the overall flow rate of the system.
It would increase the pump's output pressure significantly.
It would have no effect on the pump's operation.
5. What are the two main classifications used to rate coal?
Rank and grade
Size and weight
Color and texture
Type and quality
6. Describe the significance of rank and grade in the context of coal evaluation.
Rank and grade are interchangeable terms used to describe coal's
physical appearance.
Rank is determined by the coal's color, while grade is based on its size.
Rank refers to the degree of metamorphism of coal, while grade
indicates the quality based on its carbon content and heating value.
Rank measures the coal's moisture content, and grade assesses its ash
content.
7. Describe the role of a combination draft in maintaining boiler efficiency.
A combination draft is used to increase the temperature of the boiler.
, A combination draft helps maintain optimal airflow, which is crucial
for efficient combustion and safe boiler operation.
A combination draft solely focuses on reducing fuel consumption.
A combination draft eliminates the need for safety measures in boiler
operation.
8. The most desirable type of coal is:
Anthracite
Sub-bituminous coal
Lignite
Bituminous coal
9. Fuel oil atomizers are used in boilers to ___ _.
control the amount of air entering the furnace
break fuel oil into a fine spray
mix air and fuel together
control the temperature of fuel entering the furnace
10. If a stationary engineer discovers that the vent line of an open feedwater
heater is clogged, what immediate action should they take to ensure optimal
operation?
Clear the vent line to reduce the level of air and non-condensables.
Increase the feedwater flow rate to compensate for the clog.
Ignore the clog as it does not affect operation.
Increase the temperature of the feedwater to counteract the clog.
, 11. What is the primary application of thermostatic type steam traps?
To regulate steam pressure
To measure steam flow
To control fuel supply
To remove condensate from steam systems
12. Describe how increasing temperature and fuel supply affects steam pressure
in a boiler system.
Increasing water level reduces steam pressure by diluting the steam.
Increasing temperature and fuel supply raises the energy available
for steam production, thus increasing steam pressure.
Increasing temperature decreases steam pressure due to thermal
expansion.
Increasing fuel supply without temperature adjustment has no effect
on steam pressure.
13. Describe the significance of the second number in the designation of a
reciprocating pump, such as in a 4x2x4 pump.
The second number indicates the length of the stroke of the pump.
The second number indicates the pump's flow rate.
The second number indicates the maximum pressure the pump can
handle.
The second number indicates the diameter of the discharge pipe.
14. What is the common technique employed to atomize fuel oil in combustion
systems?
