30. That portion of the steam drum, containing a manhole for internal access to the drum, for the purpose of cleaning, inspecting, and carrying out repairs, is called the __________.

The drumhead is the steam drum's end closure, containing the manhole used for internal access, cleaning, inspection, and repairs. Wrapper sheets form the drum's cylindrical shell, tube sheets secure boiler tubes, and end plate is a generic term not specific to this function.