Key Points Flashcards
Boiler water is the water in the boiler used to produce steam
True
Feedwater is water that us treated for use in the boiler
True
Scale is the accumulation of the minerals calcium and magnesium on boiler heating surface
True
Corrosion is rusting or pitting that weakens boiler metal by the thinning (removal) of the metal
True
Caustic embrittlement is the accumulation of high alkaline elements, which cause boiler metal corrosion at stress zones in the boiler
True
Priming and carryover can occur when boiler water is carried into the steam lines
True
Foaming is caused by the formation of steam bubbles trapped below a film on the boiler water surface
True
Alkalinity is the property of a solutionas determined by measuring its pH level
True
Boiler water pH typically should be between 10 and 11.5
True
An electronic hardness tester is commonly used to determine water hardeness
True
The total dissolved solids (TDS) present in boiler water are measured with a conductivity meter
True
External boiler water treatment is treating water before it enters the boiler
True
A water softener removes calcium and magnesium to reduce water hardnes
True
A deaerator heats feedwater to the temperature of saturated steam at the pressure withing a pressure vessel
True
A surge tank collets condensate before sending it to the deaerator
True
