(Refer to figure 91.) What is the minimum crossing altitude at DBS VORTAC for a northbound IFR flight on V257?

/in , , /by

(Refer to figure 93.) What are the normal lateral limits for Class D airspace?

/in , , /by

(Refer to figure 93.) Which altitude is the upper limit for Class A airspace?

/in , , /by

(Refer to figure 93.) What is the maximum altitude that Class G airspace will exist? (Does not include airspace less than 1,500 feet AGL.)

/in , , /by

Except when necessary for takeoff or landing or unless otherwise authorized by the Administrator, the minimum altitude for IFR flight is

/in , , /by