Referring to the impressed current cathodic...

Question 1 / 2066636eed28f7522a1c51d9d5

Question 1 of 2066636eed28f7522a1c51d9d5

Referring to the impressed current cathodic protection system shown in the illustration, if required to control the current to the anodes manually by using the hand adjustment potentiometer, what statement best represents the changes that should prompt one to recheck the reference electrode voltage (hull potential)? Illustration EL-0090

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🔍 Key Concepts

• Impressed current cathodic protection (ICCP) depends on the electrical resistance of seawater between anodes and hull. • Seawater resistivity changes mainly with temperature and salinity, which affect the current needed for proper protection. • Vessel speed influences flow and erosion, but consider whether it significantly changes the electrical circuit between anodes, reference electrodes, and hull.

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• For each factor (temperature, salinity, speed), ask: does this change the conductivity of the electrolyte (seawater) enough to alter hull potential? • Think about what the reference electrode voltmeter is actually measuring in the diagram and which environmental changes would shift that reading. • Which of the listed changes are more gradual environmental conditions versus more operational/short‑term conditions?

✅ Before You Answer

• Identify which factors most strongly affect seawater conductivity / resistivity around the hull. • Consider whether a change in ship speed alone would change the hull-to-electrolyte potential the reference electrode sees. • Verify that the chosen option consistently treats the same factors as either requiring or not requiring a hull-potential recheck (no internal contradictions).

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Question 1 of 20

Changes in vessel speed, sea water temperature, and sea water salinity should all prompt rechecking.

Changes in sea water temperature and vessel speed should all prompt rechecking. Changes in sea water temperature need not prompt rechecking.

Changes in sea water temperature and sea water salinity should all prompt rechecking. Changes in vessel speed need not prompt rechecking.

Question 1 / 2066636eed28f7522a1c51d9d5

Question 1 of 2066636eed28f7522a1c51d9d5

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Question 1 of 20

66636eed28f7522a1c51d9d5

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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