Answer :
Final answer:
Medium and large size airports typically use either concrete or asphalt runways due to their ability to support heavy aircraft and handle high volumes of traffic. Grass and dirt runways are unsuitable for such operations. The choice between concrete and asphalt depends on cost, maintenance, and durability preferences.
Explanation:
The question asks about the type of runway typically used at medium and large size airports. The options given are grass runway, concrete runway, asphalt runway, and dirt runway. For medium and large-sized airports, the correct type of runway material used is generally either concrete or asphalt. Both these materials are capable of supporting the heavy weight of commercial and cargo aircraft that use these airports. Grass and dirt runways are not suitable for the operations of medium and large airports due to the lack of necessary strength and durability to support heavy aircraft and the volume of traffic such airports experience.
The majority of medium to large airports use asphalt runways due to its cost-effectiveness and ease of maintenance. However, concrete runways are also commonplace, especially where longer-lasting materials are desired despite the higher initial cost. Both materials provide the necessary strength, durability, and safety required for the operation of medium and large airport runways.
