If you have a simplex single acting...

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Question 1 of 205eccef9bbacbc34ba4d45527

If you have a simplex single acting reciprocating pump making 130 strokes/minute, with a 3" diameter cylinder, a 5" stroke and operating with 91% volumetric efficiency, what is the capacity of this pump?

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🔍 Key Concepts

• Pump capacity formula for reciprocating pumps (based on cylinder volume per stroke × strokes per minute) • How to compute cylinder volume from diameter and stroke length • Effect of volumetric efficiency on theoretical pump capacity

💭 Think About

• First, find the volume displaced by one stroke of the pump in cubic inches. What geometric shape are you dealing with? • Next, multiply that single-stroke volume by strokes per minute to get a flow rate in cubic inches per minute. How do you convert cubic inches per minute to gallons per minute? • Finally, apply the volumetric efficiency to your theoretical flow. Does the actual capacity increase or decrease compared to the theoretical value?

✅ Before You Answer

• Be sure to convert all linear dimensions to the same units (inches) before computing volume. • Use the correct conversion: 231 cubic inches = 1 gallon when changing to gallons per minute. • Remember that volumetric efficiency is a percentage of the theoretical capacity, not something you add or subtract directly.

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