Airport Engineering
A gradient of + 0.08% is followed by a gradient of - 0.07%. If the permissible rate of change of grade is 0.003 per 30 meters, the length of the transition curve, is

140 m
160 m
175 m
150 m

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Airport Engineering
Castor angle is defined as the angle

Formed by the longitudinal axis of the aircraft and the direction of movement of the nose gear
Between the direction of wind and the longitudinal axis of the runway
Between the true speed of the aircraft and the crosswind component
Between the horizontal and the fuselage axis

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Airport Engineering
Speed of

Sound varies 2.4 kmph per degree centigrade rise in temperature
Sound at 0°C is 1190 kmph
Sound at 0°C is called one Mach
All listed here

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