323.What does the electric pump pressurize the Blue system ?

　When aircraft on ground, ELEC PUMP pb in AUTO position and OVRD (override) pushbutton is set to ON.

　When G & Y system are detected in low pressure configuration.

　As soon as one engine is running and OVRD pushbutton is set to “ON”.

正确答案：A

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338.When is the TAT probe heated ?

337.With both engine anti-ice pushbuttons set to ON, does the N1 limit change ?

336.What happens in case of insufficient air pressure to the engine anti-ice valve ?

335.What happens in case of loss of electrical power supply to the engine anti-ice valve ?

334.What happens when the filter of the filling circuit is clogged?

333.What is the main function of the restrictor ?

332.Do the hydraulic reservoirs have to be depressurized to refill with hydraulic fluid ?

331.What is the purpose of the pressure relife valve?

330.What are the manual depressurization valves provided for ?

329.When can the APU pressurize the reservoirs ?