Commercial Driving Vehicle Operation

Question 1

What is the correct technique for downhill braking with a commercial vehicle?

Accepted Answer

Use a low gear and apply brakes in short intervals to keep speed safe

Answer

Ride the brakes continuously

Answer

Apply brakes hard at the bottom of the hill

Answer

Coast in neutral to save fuel

Question 2

What is the recommended following distance for a commercial vehicle at highway speeds?

Accepted Answer

6-7 seconds or more

Answer

2 seconds

Answer

4 seconds

Answer

10 seconds

Question 3

What is the 'stab braking' technique?

Accepted Answer

Applying brakes fully, releasing when wheels lock, then reapplying when wheels start rolling again

Answer

Pressing the brake pedal once and holding it

Answer

Tapping brakes rapidly

Answer

Using the parking brake while moving

Question 4

What causes a jackknife in a tractor-trailer?

Accepted Answer

The drive wheels losing traction while the trailer pushes the tractor, causing it to swing around

Answer

Turning the steering wheel too slowly

Answer

Driving too slowly

Answer

Using the engine brake in warm weather

Question 5

What is the proper procedure for entering a curve with a commercial vehicle?

Accepted Answer

Slow down BEFORE the curve and accelerate slightly through it

Answer

Accelerate through the curve for stability

Answer

Brake hard while in the curve

Answer

Maintain the same speed throughout

Question 6

What is the danger of an overloaded commercial vehicle?

Accepted Answer

It can cause brake failure, tire blowouts, steering difficulty, and structural damage

Answer

It uses less fuel

Answer

It is only a legal problem

Answer

Overloading makes the vehicle more stable