A centrifugal ballast pump has a capacity of...

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Question 1 of 205eccef9dbacbc34ba4d45e05

A centrifugal ballast pump has a capacity of 200 gpm. If suction is taken on a ballast tank containing 200 long tons of seawater, how much water will be remain in the tank after discharging for one hour?

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🔍 Key Concepts

• Unit conversion between gallons and long tons of seawater (remember 1 long ton of seawater ≈ 2240 pounds) • Pump capacity in gpm (gallons per minute) and converting to total gallons pumped in one hour • Relationship: Initial quantity – quantity discharged = quantity remaining

💭 Think About

• First, convert the pump capacity in gpm to total gallons pumped in 60 minutes. What simple multiplication do you need? • Next, how do you convert the total gallons pumped to long tons of seawater? What standard weight do we usually use for 1 gallon of seawater? • After you find how many long tons are discharged in one hour, how do you use the initial 200 long tons to get the remaining amount in the tank?

✅ Before You Answer

• Be sure you are using seawater weight per gallon, not fresh water (they are slightly different). • Double‑check that you converted minutes to hours correctly when using 200 gpm. • Confirm your final answer is still less than the original 200 long tons and that the amount pumped out in one hour is reasonable for a 200 gpm pump.

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