USCG Exam PracticeWatch duties, terminology, and instrumentation
During a boiler watch, the gauge glass is blown down and the water level does not return promptly after the drains are closed. What does this indicate?
- A. The boiler drum level is correctly within the normal operating band
- B. The feedwater regulator is in three-element control mode
- ✓ The gauge glass connections may be obstructed and the reading may not be reliableCorrect
- D. The boiler is experiencing priming and carryover
Why C is correct
NAVEDTRA 14104 §4-2 states that the gauge glass is blown down to clear the connections and confirm the level returns promptly and reads truly, so that a stuck or falsely high reading cannot mask a real low-water condition. Failure of the level to return promptly after blowdown indicates the connections may be obstructed and the gauge glass reading cannot be trusted.
Cited:NAVEDTRA 14104 §4-2