SC Boiler Installation Practice Questions - South Carolina Boiler Installation Contractor Examination Exam

Why must a steam-boiler pressure gage be connected through a siphon (pigtail) or equivalent water seal?

To develop and maintain a water seal that keeps steam out of the gage tube To allow the gage to be used as a low-water cutoff To vent noncondensable gases from the steam space To increase the indicated pressure by one atmosphere

Correct Answer:

To develop and maintain a water seal that keeps steam out of the gage tube

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