Home › CDL Practice Tests › Combination Vehicles Questions › Question 150
Which statement about stopping distance for a loaded combination vehicle on a downgrade is correct?
- A.Gravity works against the brakes, so stopping distance grows and brake heat builds faster than on level ground
- B.A downgrade shortens stopping distance because weight presses the tires down
- C.Downgrades do not affect air brake lag
- D.A loaded combination stops in the same distance on any grade
Correct answer
A. Gravity works against the brakes, so stopping distance grows and brake heat builds faster than on level ground
Why
On a downgrade part of the braking force is spent just fighting gravity before any actual slowing happens. Heavy loads on grades are where speed control, gear choice, and early braking matter most.
Manual topic: Combination Vehicles - Skids and Jackknifing · From the Combination Vehicles practice bank (CV-150).