Question 121Gas Turbine - Assistant Engineer

70% to pass

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

AOpens completely at a specified lift pressure and then immediately closes.

BClosed completely at a specified lift pressure and slowly opens as system pressure drops.

COpens completely at a specified lift pressure and remains open until a preset pressure is attained.

DCloses completely at a specified pressure and remains closed.

AI Explanation

The correct answer is C) Opens completely at a specified lift pressure and remains open until a preset pressure is attained. The bleed air surge relief valve differs from a normal relief valve in that it remains open after being activated, rather than closing immediately after reaching the specified lift pressure. This allows the valve to continue releasing pressure in the system until it drops to a preset level, rather than just venting momentarily. This functionality helps to prevent pressure surges and stabilize the system. The other options do not accurately describe the behavior of a bleed air surge relief valve.