Practice question

What is the first action a commercial driver should take to recover from an impending trailer jackknife skid?

Release the service brakes immediately to allow the drive wheels to regain rolling traction, and countersteer in the direction of the skid
Apply maximum emergency foot brake force
Pull the trailer hand valve (trolley brake) down hard
Accelerate to top speed in low gear

Answer: A — Release the service brakes immediately to allow the drive wheels to regain rolling traction, and countersteer in the direction of the skid

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