Question 1

If the drive wheels begin to skid from over-acceleration on a slippery road, what should the driver do?

Accepted Answer

Ease off the accelerator until traction returns — Easing off the accelerator lets the drive wheels regain traction; braking hard or accelerating further can make a drive-wheel skid worse.

Question 2

Can a heavy commercial vehicle hydroplane on a wet road despite its weight?

Accepted Answer

Yes, at high enough speed a layer of water can still lift the tires off the road — Weight alone doesn’t prevent hydroplaning; at sufficient speed, water can still build up faster than the tread can channel it away, lifting the tires.

Question 3

Why should a driver use a spotter when backing a large commercial vehicle, if one is available?

Accepted Answer

A spotter can see blind areas that the driver cannot see from the mirrors alone — A spotter can see into blind spots the driver has no view of, which is why using one is strongly recommended whenever backing a large vehicle.

Question 4

What is a recommended technique for starting a commercial vehicle on an uphill grade?

Accepted Answer

Use the parking brake to hold the vehicle while applying power, then release it smoothly — Using the parking brake to hold the vehicle while applying power, then releasing it as the vehicle moves, prevents rolling backward on an uphill start.

Question 5

What is a recommended steering technique for controlling a large commercial vehicle?

Accepted Answer

Keep both hands on the wheel, using a smooth push-pull motion rather than crossing your arms — A push-pull steering technique with both hands on the wheel gives better control than crossing the arms, especially on a large vehicle.

Question 6

What is "double-clutching" in a manual-transmission commercial vehicle?

Accepted Answer

Using the clutch twice per gear change to match engine speed to the next gear — Double-clutching uses two separate clutch actions per shift to bring engine speed in line with the next gear, common in non-synchronized commercial transmissions.

Basic Control Practice Questions