Exam (elaborations)
Water Treatment - Exam 6 – 25 Questions with Accurate Answers
Water Treatment - Exam 6 – 25 Questions with Accurate Answers
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Water Treatment - Exam 6 – 25Questions with Accurate Answers
Boiler water is treated to prevent ___ - --scale .......
-pitting..... and
-caustic embrittlement
-Hardness is a measure of scale-forming ___ dissolved in water - -minerals
-Boiler water having high alkalinity could develop ___ - -caustic
embrittlement
-Deposits of calcium and magnesium carbonates on the boiler surface cause
___ - -scale
-Pitting and channeling of boiler metal in the water are caused by ___ - -
oxygen and carbon dioxide
-Chemicals added to the boiler water change the scale-forming salts into a
___ - -non-adhering sludge
-___ is small water particles and impurities carried out of the boiler into the
steam lines - -Carryover
-Surface tension on the water in a steam drum is increased by ___ - -
impurities that float on the water surface
-A direct cause of overheating of the boiler tubes is ___ - -scale formation on
the tubes
-Priming is dangerous and can lead to ___ - -water hammer
-Scale buildup on the water side of a steam boiler is caused by ___ - -
improper boiler water treatment
-Trace amounts of dissolved oxygen in the boiler water are removed by ___ -
-adding sodium sulfate to the water
-The required frequency for blowing down a steam boiler is best determined
by ___ - -boiler water analysis
-A cold-lime soda softener works at ___ - -ambient temperature
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