LA Steam Engineer 91 Questions and
Correct Solutions.
LA Steam Engineer 91 Questions and
Correct Solutions.
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
, LA Steam Engineer 91 Questions and
Correct Solutions.
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
Correct Solutions.
LA Steam Engineer 91 Questions and
Correct Solutions.
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
, LA Steam Engineer 91 Questions and
Correct Solutions.
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
