As found in a basic pneumatic automatic combustion control system, the function of a standardizing relay is to __________.

Correct Answer: Option B — introduce a control for maintaining constant steam pressure regardless of boiler load

A standardizing relay, or proportional-plus-reset controller, automatically adjusts the fuel and air loading pressure to maintain constant header steam pressure across varying loads, eliminating offset and returning the system to its setpoint regardless of steam demand fluctuations.