Airport Engineering
According to I.C.A.O. the recommended length of air ports is decided on

All listed here
Standard sea level temperature (15°C)
Effective gradient percentage
Sea level elevation

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Airport Engineering
In instrument landing system

Localizer and L.M.M. are installed on one side and L.O.M. on the other side
L.O.M. and Localizer are installed on one side and L.M.M. on the other side
None of these
L.O.M. and L.M.M. are installed on one side and Localizer antenna on the other side

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Airport Engineering
Effective length of a runway is the distance between

Point of intersection of the obstruction clearance line and the extended plane of the runway surface, and the other end of the runway
Ends of the clear way on either side
Point of intersection of the glide path and the extended plane of the runway surface and the other end of the runway
Ends of the runway

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