词汇与结构When one of the actuating units has been operated and pressure in the line between the pump and selector valve builds up to the desired value, a ________ in the pressure regulator automatically opens.
A. valve
B. valid
C. variety
D. value
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词汇与结构In the event of a malfunction of the pressure ________ , the relief valve (safety valve) will release any pressure.
A. regulation
B. regulate
C. regulator
D. regular
词汇与结构The pressure regulator unloads or ________ the engine driven pump when the desired pressure in the system is reached
A. relieves
B. believes
C. releases
D. grieves
词汇与结构In the event of a malfunction of the pressure regulator, the_______ (safety valve) will release any pressure above that maintained by the system pressure regulator.
A. check valve
B. relief valve
C. throttle valve
D. regulator
词汇与结构The hydraulic system may be affected by ________ problems or outside damage such as bird-strike.
A. technical
B. safety
C. medical
D. organic