Airport Engineering
Zero fuel weight of an aircraft is:

Equal to maximum landing weight
Less than empty operating weight
Equal to empty operating weight
Equal to sum of empty operating weight and the maximum pay load

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Airport Engineering
Wing loading of an aircraft is

Gross total weight of the aircraft/ load of the wings
Load of the wings
Gross total weight of the aircraft/ wing area
Gross total weight of the aircraft/total available H.P of engines

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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 horizontal and the fuselage axis
Between the direction of wind and the longitudinal axis of the runway
Between the true speed of the aircraft and the crosswind component

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