Civil FE Exam Questions and Answers ()
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Acidity ACCURATE RESPONSE>>measure of acids in solution
caused by the formation of carbonic acid (H2CO3) from carbon dioxide in the air.
4.5<pH, carbonic acid ionized to form bicarbonate
8.3<pH, carbonate ions form
Alkalinity ACCURATE RESPONSE>>negative ions
ability of water to neutralize acids (absorb hydrogen ions)
Principal Alkaline ions ACCURATE RESPONSE>>OH- CO3-- HCO3-
Water hardness ACCURATE
RESPONSE>>positive ionspresence of
polyvalent metallic cations
total hardness ACCURATE RESPONSE>>sum of magnesium and calcium expressed as mg/L CaCO3
Carbonate hardness ACCURATE RESPONSE>>cations from dissolution of calcium or magnesium
carbonateand bicarbonate in water
Non carbonate hardness ACCURATE RESPONSE>>Also called permanent
hardness catiion from calcium and magnesium compounts of sulfate chloride or
silicate
Irons effect in water ACCURATE
RESPONSE>>stains porcelainbrown clothing
titration analysis
Manganese effect in water ACCURATE RESPONSE>>same as iron
Phosphorus effect in water ACCURATE
RESPONSE>>algae caloremic digestion methods
Nitrogen effect in water ACCURATE RESPONSE>>can reach large concentration of
groundwater can cause blue baby syndrome
algae
water color ACCURATE RESPONSE>>caused by true color
substancescompared to cobolt
turbidity ACCURATE RESPONSE>>light transmission
total solids ACCURATE RESPONSE>>residue after evaporation
, total suspended solids ACCURATE RESPONSE>>retained on filter
total dissolved solids ACCURATE RESPONSE>>pass through standard filter
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