Washington State Water Distribution Manager (WDM) 1 Certification Practice Exam

Convert 1,750 gpm to gallons per hour.

105,000 gph 1,050 gph 10,500 gph 1,050,000 gph

Correct Answer:

105,000 gph

Explanation:

Converting from gallons per minute to gallons per hour uses the simple fact that there are 60 minutes in an hour. Multiply the flow by 60 to switch units. So 1,750 gpm × 60 equals 105,000 gph. Therefore, 105,000 gallons per hour is the correct result. The other numbers come from applying the conversion factor incorrectly—dividing by 60 or multiplying by 600—leading to off-by-factor results.

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