Aircraft Owners and Pilots Association Protecting Your Freedom to Fly

Safety Quiz

AOPA Air Safety Foundation

ASI Safety Quiz

Obstacle Clearance

Controlled flight into terrain or flying into a tower of some sort is not likely to end well. It's possible to use maximum elevation figures (MEFs), and other easily-obtainable data to minimize your chances of an inflight collision. This quiz will test your knowledge of avoiding close encounters of the unpleasant kind.

1. Which altitude offers the most amount of obstacle clearance?

2. Which chart contains MEF altitudes?

3. Which chart contains OROCA altitudes?

4. OROCA altitudes provide __________ feet of obstacle clearance in mountainous areas and _________ feet of obstacle clearance in non-mountainous areas.

5. The MOCA provides obstacle clearance when established on an airway.

6. The MEF may provide as little as 101 feet of obstacle clearance.

7. While flying near the Newcomerstown VOR what altitude guarantees one-thousand feet of obstacle clearance?

IFR en route low altitude chart

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8. When flying from 6G5 to KPHD the MEF altitude is ________?

VFR sectional

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9. If flying direct from the Battle Mountain VOR to Winnemucca Municipal airport what altitude will ensure obstacle clearance?

IFR en route low altitude chart with OROCA

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10. As a VFR pilot flying in class E airspace the ceiling should be above _____feet MSL to ensure both obstacle clearance and the appropriate VFR cloud clearance below the ceiling?

mountainous terrain VFR sectional

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