USCG Exam PracticeWatch duties, terminology, and instrumentation
A watchstander needs to open a valve on a steam line to perform a routine task. Which sequence of verifications is required before opening the valve?
- ✓ Confirm the line is isolated, depressurized, cooled, and tagged out where requiredCorrect
- B. Confirm the line is depressurized and that the watch engineer has been notified
- C. Confirm the line is cooled and that hearing protection is worn
- D. Confirm the line is tagged out and that a second watchstander is standing by
Why A is correct
NAVEDTRA 14104 §1-2 specifies that before opening any pressurized system, valve, or casing, the watchstander verifies it is isolated, depressurized, cooled, and, where required, tagged out. All four conditions must be confirmed; notification of the watch engineer and a standby watchstander are not listed as the required sequence in the source.
Cited:NAVEDTRA 14104 §1-2