Prior to a worker entering the steam drum of an off-line boiler that is connected to a common, pressurized steam header, the
a. Worker must be equipped with the correct tools and a list of required repairs
b. Worker must be provided with a safety kit for confined space entry
c. Worker must be provided with a safety line, first aid kit, and hard hat
d. Main steam, blowdown and feedwater valves must be closed, locked and tagged
e. Drum must be vented, the safety valve must be gagged, and all ash and soot removed from the fire box
Answer: d