Very often, the multiple-choice answers on the math portion of water treatment facility operator certification exams are supplied in a "rounded off" form. For this reason, the answers on certification tests may be very close, but not identical, to the answers that appear on your calculator screen. When selecting a multiple-choice answer on your certification exam, choose the multiple-choice answer that is closest to the figure on your calculator screen.
EXAMPLES OF ROUNDED-OFF NUMBERS:
310,020 gallons might be written as 310,000 gallons.
1206 cubic feet might be written as 1200 cubic feet.
65.34 mg/l might be written as 65 mg/l.
8.247 MGD might be written as 8.2 or 8.25 MGD.
Note: Math questions and answers on introductory-level water treatment operator certification exams are not intended to be particularly tricky. There will generally be enough difference in the multiple-choice answers on these exams, so there will be no doubt as to which answer is correct.