Which of the following should occur to prepare a vessel for maintenance?
A. The plant must be shut down.
B. The supervisor must complete the preparation steps.
C. The vessel must be isolated from all types of hazardous energy.
D. The vessel must be cleaned.
A. Incorrect. To prepare a vessel for maintenance, the vessel must be isolated from all types of hazardous energy, including electrical, mechanical, hydraulic, pneumatic, chemical, and thermal.
B. Incorrect. To prepare a vessel for maintenance, the vessel must be isolated from all types of hazardous energy, including electrical, mechanical, hydraulic, pneumatic, chemical, and thermal.
C. Correct. To prepare a vessel for maintenance, the vessel must be isolated from all types of hazardous energy, including electrical, mechanical, hydraulic, pneumatic, chemical, and thermal.
D. Incorrect. To prepare a vessel for maintenance, the vessel must be isolated from all types of hazardous energy, including electrical, mechanical, hydraulic, pneumatic, chemical, and thermal.
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