A professional who assists powerhouse mechanic in maintaining and repairing power-generating equipment. Responsibilities include:

• Lubricates automatic recording instruments, changes recording charts, and refills ink containers.
• Removes instruments from panelboards for repairs, and reinstalls them when repairs are completed, using handtools.
• Carries or handtrucks tools and equipment to work areas.
• Removes nuts and bolts from machinery being disassembled for repairs.
• Holds parts in place for workers performing repair work.
• Returns tools to toolroom.
• Constructs scaffolds.
• Removes rust and scale from inside of boilers, using wire brush.
• Performs other duties as described under helper master title.
• May be designated according to plant in which work is performed as diesel-powerplant-mechanic helper; gas-turbine-powerplant-mechanic helper; geothermal-powerplant-mechanic helper; nuclear-powerplant-mechanic helper; steam-generating-powerplant-mechanic helper.