Question 109Steam Plants - Assistant Engineer

The correct answer is D) blow down the gage glass. If the engineer on watch has reason to doubt the accuracy of the water level shown in the boiler gage glass, the proper action is to blow down the gage glass. This allows the engineer to check the actual water level in the boiler, rather than relying solely on the potentially inaccurate gage glass reading. Blowing down the gage glass is the best way to verify the true water level and ensure the safe operation of the boiler. The other options, such as speeding up the main feed pump (A) or starting the standby feed pump (C), are not the appropriate actions to take in this situation, as they do not directly address the issue of verifying the accuracy of the water level reading.