Coast Guard Regulations (46 CFR Part 56)...

Question 1 / 205eccef9bbacbc34ba4d453ef

Question 1 of 205eccef9bbacbc34ba4d453ef

Coast Guard Regulations (46 CFR Part 56) require all power-operated valves, other than those opened against spring force, to have an energy storage system. That energy storage system shall be capable of __________.

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🔍 Key Concepts

• 46 CFR Part 56 – Power‑operated valves and actuators in piping systems • Purpose of an energy storage system after loss of electrical power • Difference between: continuous operation vs. having enough stored energy to complete required valve movements

💭 Think About

• Ask yourself: After a total power failure, what is the minimum safe function these valves absolutely must still be able to perform with stored energy? • Think about what ‘cycling’ or ‘closing multiple times’ would mean in practice on a ship — is that typically required by regulation, or is a single full movement usually the design basis? • Consider whether regulations usually require long‑term continuous operation after power failure, or just enough stored energy to move the valve(s) through their necessary positions for safety.

✅ Before You Answer

• Check which option specifically mentions moving all connected valves through a complete stroke using only stored energy. • Verify whether any option is asking for continuous time-based operation (e.g., 60 minutes) rather than a defined number of valve movements – is that consistent with how actuators are usually specified in the CFR? • Confirm that the chosen option matches the idea of an emergency duty cycle after power loss, not normal powered operation or cross‑connection to another supply.

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Question 1 of 20

being cross connected to an alternate power supply

cycling all connected valves from the initial valve position to the opposite position and return

operating continuously for 60 minutes after a power failure

closing all connected valves three times

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Question 1 / 205eccef9bbacbc34ba4d453ef

Question 1 of 205eccef9bbacbc34ba4d453ef

Back

Question 1 of 20

5eccef9bbacbc34ba4d453ef

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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