ELDT - Entry Level Driver Training Shifting and Vehicle Control Questions and Answers Flashcards

What is engine braking and when should it be used?

Answer: Using a lower gear to use engine compression as a retarding force

Engine braking uses gear reduction to create compression resistance, slowing the vehicle without relying on service brakes — especially useful on long downgrades.

What is the purpose of a Jake Brake (engine retarder)?

Answer: To convert the engine into an air compressor to slow the vehicle

A Jake Brake (compression release engine brake) opens exhaust valves at the top of the compression stroke, turning the engine into a retarding device.

When backing a tractor-trailer, which direction does the trailer go when the driver turns the steering wheel to the left?

Answer: The trailer moves right

When backing, turning the steering wheel left moves the front of the tractor left, which pushes the trailer to the right.

What is the correct procedure for making a right turn with a long combination vehicle?

Answer: Use the button hook method from the right lane

The button hook (or jug handle) method involves pulling forward past the turn point before swinging right so rear axles track closer to the curb.

What is 'off-tracking' in a tractor-trailer?

Answer: The tendency of rear axles to follow a tighter path than the front axles in a turn

Off-tracking occurs because the rear axles of a long vehicle follow a shorter arc than the front axles, causing them to cut inside on turns.

What should a CMV driver do if the vehicle begins to hydroplane?

Answer: Ease off the accelerator and avoid sudden steering corrections

When hydroplaning, gently release the accelerator and hold a steady steering course — sudden inputs can cause loss of control.