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Home IFR Quiz IFR Quiz—February 2024

IFR Quiz

IFR Quiz—February 2024

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Published: January 15, 2024 Updated: February 10, 2025

IFR Quiz February 2024

Instrument pilots often must land on contaminated runways. Sometimes, an airplane's directional control is challenged by hydroplaning, a common cause of runway excursions. This month, we delve into this phenomenon and suggest ways to minimize its effects.

1. Dynamic hydroplaning is
- a. when tires ride on a contaminant, not a surface.
- b. different from aquaplaning.
- c. always present when the runway is wet.
- d. not a problem at low speeds.
2. The FAA considers a runway contaminated when _____ is present.
- a. standing water
- b. heavy rubber
- c. snow, slush, or frost
- d. any of the above
3. Why do aircraft tires have grooved treads?
- a. The treads channel water away from the tire.
- b. The absence of tread shows tire cord, meaning it needs replacement.
- c. The tread is simply cosmetic.
- d. It's used to distinguish between an aviation and a wheelbarrow tire.
4. You know you’re hydroplaning in a crosswind if
- a. the airplane weathervanes into the wind while traveling down the runway.
- b. you are unable to use nosewheel steering.
- c. the brakes are ineffective.
- d. one brake is locked.
5. Hydroplaning can be minimized if
- a. you land softly.
- b. you land firmly.
- c. you land normally.
- d. There’s no difference.
6. The type and degree of hydroplaning depends on
- a. runway surface.
- b. depth and type of contaminant.
- c. tire tread.
- d. airspeed.
- e. All the above.
7. Which is not a form of hydroplaning?
- a. Dynamic
- b. Reverted rubber
- c. Viscous
- d. Static
8. Dynamic hydroplaning occurs when
- a. an aircraft at a relatively high speed creates a wedge of water.
- b. an aircraft is relatively slow.
- c. the contaminating agent is slush or snow.
- d. any type of contaminant is present.
9. Should the wedge pressure equal or exceed the aircraft weight, the tire will
- a. ride on the water.
- b. fail.
- c. become ineffective.
- d. spin faster.
10. Dynamic hydroplaning speed is ____ proportional to the aircraft ____. It equals ___ times the square root of the tire pressure in psi.
- a. inversely, groundspeed, 7
- b. directly proportional, tire inflation pressure, 8.6
- c. not, tire inflation pressure, 6
- d. not easily calculated.
11. A contaminant your tires don't penetrate results in _______ hydroplaning.
- a. dynamic
- b. reverted rubber
- c. viscous
- d. static
12. How do you minimize dynamic hydroplaning?
- a. Land slow.
- b. Underinflate tires.
- c. Retain back pressure for aerodynamic braking.
- d. Land firmly.
- e. All the above.
13. What causes reverted rubber hydroplaning? a. When the tire locks up
- a. When the tire locks up
- b. A thick film of water
- c. Friction causes the rubber to revert to its uncured state.
- d. Answers a. and c.
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