LA STEAM ENGINEER EXAM
QUESTIONS AND ANSWERS (GRADED
A+)
A desuperheater that is installed in a boiler is used to control.. - ANSWER-Super heated
steam temperature
Economizers are finned to.. - ANSWER-Increase the rate of heat for heat transfer
The heat transfer taking place in a surface condenser is accomplished mainly by.. -
ANSWER-Conduction
An unfired pressure vessel which is used to transfer heat from one substance to another
is called.. - ANSWER-Feed water heater, Evaporator and Oil Cooler
Boiler economizers are primarily used for.. - ANSWER-Recovery heat from flue gas
The main purpose of the deaerator is to.. - ANSWER-Eliminate non-condensable gases
Superheated steam is more efficient because.. - ANSWER-Temperature & Total heat
content are increased
A spear boiler feed water pump is equipped with a check valve in the discharge line to...
- ANSWER-Permit fast start up by leaving the discharge valve open
Excessive fireside deposits on heating surfaces of a uncontrolled super heated boiler
would be indicated by... - ANSWER-Decreased super heater outlet temperature
Why is the super heater safety valve set to release before the drum safety? - ANSWER-
To ensure flow through the super heater
What is the purpose of a steam trap? - ANSWER-To drain water and air
A steam trap utilizes flash steam to open but what comes after for the closing
operation? - ANSWER-Impulse
Pitting in suction areas of a bronze impeller in centrifugal pumps is usually caused by? -
ANSWER-(Best answer) Cavitation or (Second Best) Corrosion
What type of pump has no moving parts? - ANSWER-Jet pump
, Centrifugal boiler feed water pumps are usually equipped with? - ANSWER-Bypass
valves
Which condition is the probable cause of centrifugal pump failure to deliver water when
first started? - ANSWER-Pump is not primed
Low pressure from metering or proportioning pumps may be caused by? - ANSWER-
Rapid wear on plunger
If a centrifugal pump that operates with suction lift becomes air bound you should? -
ANSWER-Reprime the pump
An important consideration in the prevention of carryover in a boiler is to? - ANSWER-
Control water level
As alkalinity of boiler water increases the water inside the boiler becomes increasingly
_________? - ANSWER-Soft
The residue created from chemically treated feed water remains in the boiler thus
increasing the need for? - ANSWER-Boiler Blowdown
Grooving and pitting is caused by? - ANSWER-Dissolved O2 and CO2
What test is used to detect corrosive boiler water? - ANSWER-Hardness Test
Chemical which would not be used for the purpose of regeneration of softner and
dematerialize is? - ANSWER-Sulfuric acid
Why are continuous blow downs necessary on high make up? - ANSWER-To maintain
proper dissolved boiler water solids
Steam seperation is less effective when there is? - ANSWER-High water level in the
drum
Soft sludge in the waterside of the boiler can be readily produced by? - ANSWER-
Dissolved salts
Oxygen entrapped in feed water entering the boiler can cause? - ANSWER-Erosion
Non condensable gases and O2 are removed from boiler feed water by? - ANSWER-
Dearation
When the boiler firing rate increases, combustion control does what? - ANSWER-
Increases the air first, followed by the fuel
QUESTIONS AND ANSWERS (GRADED
A+)
A desuperheater that is installed in a boiler is used to control.. - ANSWER-Super heated
steam temperature
Economizers are finned to.. - ANSWER-Increase the rate of heat for heat transfer
The heat transfer taking place in a surface condenser is accomplished mainly by.. -
ANSWER-Conduction
An unfired pressure vessel which is used to transfer heat from one substance to another
is called.. - ANSWER-Feed water heater, Evaporator and Oil Cooler
Boiler economizers are primarily used for.. - ANSWER-Recovery heat from flue gas
The main purpose of the deaerator is to.. - ANSWER-Eliminate non-condensable gases
Superheated steam is more efficient because.. - ANSWER-Temperature & Total heat
content are increased
A spear boiler feed water pump is equipped with a check valve in the discharge line to...
- ANSWER-Permit fast start up by leaving the discharge valve open
Excessive fireside deposits on heating surfaces of a uncontrolled super heated boiler
would be indicated by... - ANSWER-Decreased super heater outlet temperature
Why is the super heater safety valve set to release before the drum safety? - ANSWER-
To ensure flow through the super heater
What is the purpose of a steam trap? - ANSWER-To drain water and air
A steam trap utilizes flash steam to open but what comes after for the closing
operation? - ANSWER-Impulse
Pitting in suction areas of a bronze impeller in centrifugal pumps is usually caused by? -
ANSWER-(Best answer) Cavitation or (Second Best) Corrosion
What type of pump has no moving parts? - ANSWER-Jet pump
, Centrifugal boiler feed water pumps are usually equipped with? - ANSWER-Bypass
valves
Which condition is the probable cause of centrifugal pump failure to deliver water when
first started? - ANSWER-Pump is not primed
Low pressure from metering or proportioning pumps may be caused by? - ANSWER-
Rapid wear on plunger
If a centrifugal pump that operates with suction lift becomes air bound you should? -
ANSWER-Reprime the pump
An important consideration in the prevention of carryover in a boiler is to? - ANSWER-
Control water level
As alkalinity of boiler water increases the water inside the boiler becomes increasingly
_________? - ANSWER-Soft
The residue created from chemically treated feed water remains in the boiler thus
increasing the need for? - ANSWER-Boiler Blowdown
Grooving and pitting is caused by? - ANSWER-Dissolved O2 and CO2
What test is used to detect corrosive boiler water? - ANSWER-Hardness Test
Chemical which would not be used for the purpose of regeneration of softner and
dematerialize is? - ANSWER-Sulfuric acid
Why are continuous blow downs necessary on high make up? - ANSWER-To maintain
proper dissolved boiler water solids
Steam seperation is less effective when there is? - ANSWER-High water level in the
drum
Soft sludge in the waterside of the boiler can be readily produced by? - ANSWER-
Dissolved salts
Oxygen entrapped in feed water entering the boiler can cause? - ANSWER-Erosion
Non condensable gases and O2 are removed from boiler feed water by? - ANSWER-
Dearation
When the boiler firing rate increases, combustion control does what? - ANSWER-
Increases the air first, followed by the fuel
