387.What are the necessary conditions for ground spoiler preselection?

　Ground spoilers armed and both throttles at idle or one throttle at reverse and the other one at not more than idle.

　Ground spoilers not armed and both throttles at idle .

　Both throttles at idle only.

正确答案：A

A320机型英语知识练习

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274.What is the purp[ose of the accumulator ?

273.Is nose wheel steering available after a landing gear gravity extension ?

272.What is the maximum nose wheel steering angle obtained by the handwheels ?

271.Which component gives priority to the green hydraulic system ?

270.Are the return lines shut off when the parking brake is applied ?

269.What is the purpose of the hydraulic fuses ?

268.What happens when a wheel speed decreases below 0.87 times the reference speed ?

267.When does the BSCU provide anti-skid control ?

266.What are the auto brake arming conditions ?

265.In which mode is progressive pressure sent to the brakes 2 seconds after ground spoilers deployment?