Airport Engineering
In Instrumental landing system, the middle markers are located

About 7 km. ahead of the runway threshold
About 1 km. ahead of the runway threshold
Along the extended centre line of runway end
At the runway threshold

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Airport Engineering
Assertion A : Airport capacity during IFR conditions is usually less than that during VFR conditions.Reason R: During clear weather condition (VFR), the aircrafts on final approach to runway can be spaced closer during poor visibility conditions.Select your answer based on the coding system given below:

A is true but R is false
Both A and R is true but R is not the correct explanation of A
Both A and R is true and R is the correct explanation of A
A is false but R is true

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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
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
Ends of the clear way on either side

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