Free CDL Quiz

What should you do if your brakes fail on a downhill grade?

a.Pump the brakes rapidly, downshift, and look for an escape ramp
b.Turn off the engine
c.Jump from the vehicle
d.Steer into oncoming traffic to slow down

Explanation

If your brakes fail going downhill, you should pump the brake pedal rapidly to try to build pressure, downshift to use engine braking, and look for an escape ramp or an upgrade that will slow the vehicle. Using the escape ramp is your safest option if available.

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About the CDL Exam

The CDL (Commercial Driver License) exam tests your knowledge of commercial driving rules, safety procedures, and vehicle operation. You must score 80% or higher to pass the written knowledge test. The exam covers general knowledge, air brakes, combination vehicles, and various endorsements.

This question is from the Class A CDL Knowledge Test #1 section. Practice with more questions from this category to build confidence before taking the official DMV test.

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