Originally Posted by jlemon

19. Per the North American OAG I reference for these questions, the northernmost airport in North America with scheduled jet service is served by three airlines. Identify the airport, the airlines that serve it and the aircraft each airline flies to this airport.

Ah, sounds like Resolute (YRB). If so, the airlines would have been Nordair (ND) with a B737-200, Pacific Western (PW) with a B727-100 (probably a combi) and Transair (TZ) with a B737-200.

28. This airline operated the first combi version of Fairchild-Hiller’s FH-227. The aircraft was marketed as the F27B. Identify the airline.

Well, I believe both Northern Consolidated (NCA) and Wien Air Alaska operated the F-27B combi in Alaska. Both airlines merged, of course, with Wien being the surviving air carrier so I'll guess that Northern Consolidated was the first to operate the F-27B.

38. In early 1998, TWA operated flights into only one ski area in the U.S. (Where the town is named after the ski area or vice versa). Identify that ski area and the aircraft type utilized

I think TWA operated MD-80 service to Steamboat Springs via the Yampa Valley Regional Airport (HDN) located west of Steamboat Springs near Hayden, CO.

Correct on all counts! Here's TWA's schedule between St. Louis and Steamboat Springs:

TW 337 STL-HDN 1155a-145p MD80 Lunch Daily
TW 316 HDN-STL 240p–604p MD80 Snack Daily