From the characteristics shown in the...

Question 1 / 205eccef9bbacbc34ba4d45482

Question 1 of 205eccef9bbacbc34ba4d45482

From the characteristics shown in the illustration, what would be the approximate shut-off head pressure of the centrifugal salt water pump? See illustration GS-0138.

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Question 1 of 20

5eccef9bbacbc34ba4d45482

From the characteristics shown in the illustration, what would be the approximate shut-off head pressure of the centrifugal salt water pump? See illustration GS-0138.

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🔍 Key Concepts

• Read the H–Q (head–capacity) curve and identify what "shut‑off" means in terms of pump capacity (flow in GPM). • Understand that shut‑off head is the maximum head the pump can develop when the discharge is closed (zero flow). • Convert feet of head to psi, remembering that 1 psi ≈ 2.31 ft of fresh water and that salt water is slightly heavier (so the ft/psi value is a bit lower).

💭 Think About

• On the H–Q curve, at what flow rate does shut‑off occur, and what is the corresponding total head in feet? • Once you read that head value in feet, how do you convert that to psi, and how will using salt water (heavier than fresh water) change the result slightly? • Compare your calculated psi to the answer choices and decide which one is closest to your result.

✅ Before You Answer

• Make sure you are reading total head (H) from the left vertical axis, not efficiency or BHP from the other axes. • Confirm you are at the correct point on the curve for shut‑off (look at where flow, Q, is zero or where the curve indicates the pump’s maximum head). • Use the correct conversion: for an exam approximation you can use 1 psi ≈ 2.3 ft of water head, then adjust slightly for salt water before matching to the choices.

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Question 1 of 20

From the characteristics shown in the illustration, what would be the approximate shut-off head pressure of the centrifugal salt water pump? See illustration GS-0138.

58 psi

71 psi

130 psi

360 psi

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Question 1 / 205eccef9bbacbc34ba4d45482

Question 1 of 205eccef9bbacbc34ba4d45482

From the characteristics shown in the illustration, what would be the approximate shut-off head pressure of the centrifugal salt water pump? See illustration GS-0138.

Back

Question 1 of 20

5eccef9bbacbc34ba4d45482

From the characteristics shown in the illustration, what would be the approximate shut-off head pressure of the centrifugal salt water pump? See illustration GS-0138.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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