Question 81. Consider the following statements regarding ICAO recommendation for correction to basic runway length of these statements1. The basic runway length should be increased at the rate of 7 percent per 300 m rise in elevation above the mean sea level.2. The basic runway length after having been corrected for elevation should be further increased at the rate of 1 percent for every 1°C rise in airport reference temperature above the standard atmospheric temperature at that elevation.3. The runway length after having been corrected for elevation and temperature should be further increased at the rate of 20% for every 1 percent of effective gradient.

Question 82. The centre to centre spacing of heliport lighting along the periphery of landing and takeoff area should be

Question 83. The runway orientation is made so that landing and takeoff are

Question 84. Two single runways may be arranged so as to have

Question 85. The width and interval of transverse centre line bars along the extended centre line of runway, in approach lighting system are

Question 86. The threshold markings are

Question 87. For night landing, the thresholds are lighted

Question 88. In approach areas of runways equipped with instrumental landing facilities any object within 4.5 km distance from runway end shall be considered as an obstruction if its height is more than

Question 89. Castor angle is defined as the angle

Question 90. For supersonic transport aircraft, the minimum turning radius of taxiway is