To prevent hydroplaning, you should:
- Ensure that your tires have good tread depth.
- Ensure that your tires are properly inflated.
- Reduce your speed when driving in the rain.
- All of the above. ✓
Answer: D. All of the above.
To prevent hydroplaning, all of the above: keep good tread depth, keep tires properly inflated, and slow down in the rain.
Why this is the answer
The handbook explains that hydroplaning is when your vehicle slides on a thin layer of water between your tires and the road, and you can lose control and skid. It says tires with low air pressure or bad tread raise the risk, and so does speeding. So good tread, correct inflation and a lower speed in rain all work against the same problem, which is why every one of those measures belongs in the answer.
Why the other answers are wrong
- A. Ensure that your tires have good tread depth. — Good tread depth helps, but the handbook also names low air pressure and speeding as hydroplaning risks, so tread alone is incomplete.
- B. Ensure that your tires are properly inflated. — Proper inflation helps, but the handbook also warns about bad tread and speeding, so inflation alone is incomplete.
- C. Reduce your speed when driving in the rain. — Slowing down in rain helps, but the handbook also points to low air pressure and worn tread, so speed alone is incomplete.
Remember it
Think of hydroplaning as three things working against you at once: thin tread, soft tires and too much speed. Fix all three.