How much vacuum must a fuel oil pump produce to move fuel oil 20 ft horizontally?
A) 20 ÷ 10 = 2 in of vacuum B) 20 × 1 = 20 in of vacuum
C) 20 ÷ 5 = 4 in of vacuum D) 20 ÷ 2 = 10 in of vacuum
A
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