QUESTIONS AND ANSWERS GRADED A+
A spear boiler feed water pump is equipped with a check valve in the discharge
line to...
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...
Decreased super heater outlet temperature
Why is the super heater safety valve set to release before the drum safety?
To ensure flow through the super heater
What is the purpose of a steam trap?
To drain water and air
A steam trap utilizes flash steam to open but what comes after for the closing
operation?
Impulse
,Pitting in suction areas of a bronze impeller in centrifugal pumps is usually caused
by?
(Best answer) Cavitation or (Second Best) Corrosion
What type of pump has no moving parts?
Jet pump
Centrifugal boiler feed water pumps are usually equipped with?
Bypass valves
Which condition is the probable cause of centrifugal pump failure to deliver water
when first started?
Pump is not primed
Low pressure from metering or proportioning pumps may be caused by?
Rapid wear on plunger
If a centrifugal pump that operates with suction lift becomes air bound you should?
Reprime the pump
, An important consideration in the prevention of carryover in a boiler is to?
Control water level
As alkalinity of boiler water increases the water inside the boiler becomes
increasingly _________?
Soft
The residue created from chemically treated feed water remains in the boiler thus
increasing the need for?
Boiler Blowdown
Grooving and pitting is caused by?
Dissolved O2 and CO2
What test is used to detect corrosive boiler water?
Hardness Test
Chemical which would not be used for the purpose of regeneration of softner and
dematerialize is?
Sulfuric acid