15) The cruising speed of the aircraft is 500 kmph. If there is a head wind of 50 kmph, then the air speed and ground speed of the aircraft respectively will be

16) As per ICAO, for airports serving big aircrafts, the crosswind component should not exceed

17) Calm period is the percentage of time during which wind intensity is less than

18) For determining the basic runway.length, the landing case requires that aircraft should come to a stop within p % of the landing distance. The value of p is

19) According to ICAO, all markings on the runways are