白天有平流雾移到沿海机场上,什么原因会促使平流雾消散或抬升而形成很低的层状云
A. 地表辐射;
B. 下垫面干燥;
C. 地面风大于或等于8 米/秒
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下列哪项不能作为继续着陆的目视参考?
A. 跑道中心线或跑道中心线灯
B. 跑道入口标志或跑道入口灯
C. 接地区标志
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所需目视参考(required visual reference): 飞行员应该看到 目视助航设施的一部分或进近区的一部分,并有充分时间让飞行员评 估航空器相对于预定飞行航径的位置和位置变化率。在盘旋进近中, 所需的目视参考是跑道周围的物体。Required visual reference: The pilot should see part of the visual navigation aids or part of the approach area, and have sufficient time for the pilot to evaluate the position and position change rate of the aircraft relative to the predetermined flight path. In circling approach, the required visual references are the objects around the runway.
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在高空逆温层下,能见度也常常变差,除了云之外,还可碰上的影响能见度的天气现象是__
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液压系统为 ( ) 操作提供动力。The hydraulic systems supply power to operate the()
A. 方向舵、升降舵、副翼 rudder, elevator, aileron
B. 方向舵、机轮刹车、配平 rudder, wheel brake, Trims
C. 反推、扰流副翼、偏航阻尼器 thrust reversers, spoilers and yaw damper
D. 升降舵、地面扰流板、配平 lift rudder, ground spoiler, Trims
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当机翼和整流罩被激活并且APU为引气源时:When wing or cowl anti-ice is activated and the APU is the bleed source the:
A. APU负荷控制活门被命令关闭并且引气负荷转换到发动机上。APU LCV is commanded closed and bleed air loading is transferred to the engines
B. APU 将给整流罩和机翼防冰系统供气。 APU will feed both the cowl and wing anti-icing systems
C. 发动机给整流罩防冰供气并且APU给机翼防冰供气。 engines feed the cowl anti-icing and the APU feeds the wing anti-icing
D. APU 给整流罩防冰供气并且发动机给机翼防冰供气。 APU feeds the cowl anti-icing and the engines feed the wing anti-icing
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飞机的总高度是多少 (CRJ 900)?What is the overall height of the aircraft (CRJ 900)?
A. 5.31 m
B. 6.31 m
C. 7.34m
D. 8.34 m
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判断正误True or False: 如果入侵飞机无运行的方式 S 应答机,TCAS 系统不提供交通冲突的指示。The TCAS system provides no indication of traffic conflicts if the intruder airplane is without an operative Mode 'S' transponder.
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飞行过程中,平均燃油温度必须保持高于相应的平均燃油冰冻点。对于ASTM D 1655 Jet A类燃油,其平均燃油冰冻点是()。During flight, bulk fuel temperature must remain above theapplicable bulk fuel freezing point.Bulk Fuel Freezingpoint for ASTM D 1655 Jet Ais( ).
A. -40°C
B. -46°C
C. -37°C
D. -47°C
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层状云中的降水是
A. 连续性降水
B. 间歇性降水
C. 阵性降水
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