正常操作时,确保释压活门关闭。释压活门打开表示燃油通气系统出现问题。
A.For normal operations, make sure the pressure relief valve is closed. An open pressure relief valve is a symptom of a problem in the fuel vent system. B.For normal operations, make sure the shut off relief valve works; If you open pressure relief valve, that indicates a problem in the fuel vent system. C.For normal operations, make sure you close the pressure relief valve. If you leave it open a problem will be shown in the fuel vent system.正确答案A
