Practice question

If you double your speed from 20 mph to 40 mph, how does the braking distance change?

  1. Braking distance doubles
  2. Braking distance triples
  3. Braking distance increases by four times
  4. Braking distance stays the same

Answer: C — Braking distance increases by four times

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: California CDL General Knowledge Test Practice Questions - California Commercial Driver License General Knowledge Test Exam →