After closing the drain during the blowing procedure for a glass water gauge, the water cock is opened and the water flows to the top of the glass. Then the steam cock is opened and the water flows down and out of the glass; Which of the following statements are correct?

A. The water level in the boiler is below the water cock connection of the boiler. It is unsafe to put feed water into the boiler.
B. The water level is above the steam cock connection of the boiler. There is a danger of priming the boiler if any additional feed is put into it.
C. The water level is normal, but it requires time for the gauge glass to stabilise. It is safe to put feed water into the boiler.
D. The water level is between the water cock connection of the boiler, and the bottom of the gauge glass. It is safe to put feed water into the boiler.

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MCQ.Marinesite

After closing the drain during the blowing procedure for a glass water gauge, the water cock is opened and the water flows to the top of the glass. Then the steam cock is opened and the water flows down and out of the glass; Which of the following statements are correct?

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