6.The centre to centre spacing of heliport lighting along the periphery of landing and take off area should be

7.The length of runway under standard conditions is 2000 m. The elevation of airport site is 300 m. Its reference temperature is 33.05�C. If the runway is to be constructed with an effective gradient of 0.25 percent, the corrected runway length will be

8.Assertion A : The ratio of arriving and departing aircrafts influences the airport capacity: Reason R :Landing operation is generally given priority over the taking off operation. Select your answer based on the coding system given below:

9.Calm period is the percentage of time during which wind intensity is less than

10.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