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- Third Assistant Engineer (Steam-Motor-Gas Turbine Plants (Unlimited)) »
- Q532 - Motor Plants II
157. The auxiliary oil-fired water-tube steam boiler on your ship-docking tug is equipped with a water column similar to that shown in the illustration. Assuming that the water level is at the normal operating water level (NOWL) of the boiler, what would be the result of alternately opening and reclosing each of the water column tri-cocks
At the normal operating water level, the uppermost tri-cock is in the steam space, the lowermost is in the water space, and the middle tri-cock is at the steam-water interface, potentially releasing either steam or water.
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