To comply with ATC instructions for altitude changes of more than 1,000 feet, what rate of climb or descent should be used?

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If a control tower and an FSS are located on the same airport, which function is provided by the FSS during those periods when the tower is closed?

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When departing from an airport not served by a control tower, the issuance of a clearance containing a void time indicates that

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While flying on an IFR flight plan, you experience two-way communications radio failure while in VFR conditions. In this situation, you should continue your flight under

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