Engine_2014 : Steam Plants - 804/1951
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| The guarding valve installed in a boiler bottom blow line prevents __________ . |
| A) loss of steam and water from a steaming boiler due to a leaking bottom blow valve |
| B) leakage from the blow line back to an idle boiler |
| C) entry of seawater into idle boilers due to leaking skin and bottom blow valves |
| D) all of the above |
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