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What is stab braking, and when is it used?
- A.A gentle technique for routine stops at traffic lights
- B.An emergency method for vehicles without ABS: apply the brakes fully, release them when the wheels lock and the skid begins, and reapply as soon as the wheels start rolling again
- C.Braking only with the trailer hand valve in an emergency
- D.Holding light pressure continuously on a long grade
Correct answer
B. An emergency method for vehicles without ABS: apply the brakes fully, release them when the wheels lock and the skid begins, and reapply as soon as the wheels start rolling again
Why
Stab braking alternates maximum braking with brief releases that let locked wheels regain rolling grip and steering. It is an emergency technique for non-ABS vehicles and should not be used where working ABS is controlling the stop.
Manual topic: Air Brakes - Stab Braking · From the Air Brakes practice bank (AB-240).