Periodic cleaning is used to _________
a) Increase efficiency b) Decrease efficiency c) Increase pressure d) Decrease dissolved oxygen
a) Increase efficiency b) Decrease efficiency c) Increase pressure d) Decrease dissolved oxygen
a) Fast b) Slow c) Very fast d) Moderate
a) Chlorine b) Bromine c) Fluorine d) Iodine
a) Oxygen and water b) Carbondioxide and water c) Nitrogen and water d) Chlorine an water
a) 1-4Hours b) 4-8Hours c) 8-16Hours d) 16-20Hours