The bleed air surge relief valve differs from a normal relief valve in which of the following ways?

Correct Answer: Option C — Opens completely at a specified lift pressure and remains open until a preset pressure is attained.

Bleed air surge relief valves are designed to prevent compressor stall by rapidly dumping excess pressure. Unlike standard relief valves that modulate or pop, these valves open fully at a specific setpoint and remain open until the system pressure drops below a preset threshold, ensuring stable compressor operation during transients.