Question: Which of the following should not be a composition of boiler-feed water?
Options
A : Hardness should be below 0.2ppm
B : Its caustic alkalinity should lie between 0.15 to 0.45 ppm
C : Its soda alkalinity should be 0.45-1 ppm
D : Its caustic alkalinity should be 1.5-2 ppm
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