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When these valves are shut, it shuts off a portion of the propulsion system _________

When these valves are shut, it shuts off a portion of the propulsion system _________ Correct Answer isolation valves

Isolation valves are shut to negate the contribution from a portion of the propulsion system that it controls. Drainage valves help in draining propellants, while control valves help in controlling the amount of flow passing through the adjacent to the valve.

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