QUES: The majority of the world's airports are non-towered, with no air traffic control presence. However, at particularly busy airports, or airports with other special requirements, there is an air traffic control (ATC) system whereby controllers (usually ground-based) direct aircraft movements via radio or other communications links. This coordinated oversight facilitates safety and speed in complex operations where traffic moves in all three dimensions. Air traffic control responsibilities at airports are usually divided into at least two main areas: ground and tower, though a single controller may work both stations. The busiest airports also have clearance delivery, apron control, and other specialized ATC stations.

What does apron control offer in busy airports?
What is the answer?
ANS: unanswerable
QUES: On March 15, 1915,:8 Laemmle opened the world's largest motion picture production facility, Universal City Studios, on a 230-acre (0.9-km) converted farm just over the Cahuenga Pass from Hollywood. Studio management became the third facet of Universal's operations, with the studio incorporated as a distinct subsidiary organization. Unlike other movie moguls, Laemmle opened his studio to tourists. Universal became the largest studio in Hollywood, and remained so for a decade. However, it sought an audience mostly in small towns, producing mostly inexpensive melodramas, westerns and serials.

In square kilometers, what was the size of Universal City Studios?
What is the answer?
ANS: 0.9
QUES: In coniferous or softwood species the wood cells are mostly of one kind, tracheids, and as a result the material is much more uniform in structure than that of most hardwoods. There are no vessels ("pores") in coniferous wood such as one sees so prominently in oak and ash, for example.

Are hardwood or softwood species more uniform in structure?
What is the answer?
ANS:
softwood