Stopping Distance - ONLINE CDL SCHOOL

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Stopping Distance

Build confidence with 10 original questions about Stopping Distance. Review your answers and explanations after finishing.

Supplemental study practice. This is not a government licensing exam or ELDT certification, and does not replace hands-on training. Follow your state’s current handbook.

1 / 10

How does a wet road affect your stopping distance compared to a dry road?

It can double your stopping distance

It increases stopping distance by one-third

It reduces stopping distance by half

It has no effect on stopping distance

2 / 10

On a wet road, how should you adjust your speed to maintain the same stopping distance as on dry pavement?

Increase speed by one-third

Reduce speed by about one-third

Reduce speed by half

Do not change your speed

3 / 10

What is the total stopping distance at 45 mph for a heavy vehicle?

150 feet

310 feet

81 feet

390 feet

4 / 10

If the road is icy, what is the safest action to take?

Reduce speed to a crawl and stop driving as soon as you can safely do so

Increase your speed to get off the ice quickly

Use cruise control to maintain steady speed

Brake hard to stop immediately

5 / 10

What effect does doubling your speed have on your stopping distance?

It increases stopping distance by four times

It has no effect on stopping distance

It doubles your stopping distance

It increases stopping distance by three times

6 / 10

What is the safest speed to drive in heavy traffic?

As fast as possible to save time

The posted speed limit, regardless of conditions

10 mph above the flow of traffic

The speed of other vehicles, if legal and safe

7 / 10

How does traction affect your ability to steer or brake a vehicle?

Traction only matters on dry roads

Traction is not important for braking

Traction only affects acceleration

Without traction, you cannot steer or brake effectively

8 / 10

What should you do before entering a curve to maintain control of your vehicle?

Shift to a higher gear

Slow to a safe speed before entering the curve

Brake hard in the middle of the curve

Accelerate into the curve

9 / 10

At 55 mph on dry pavement with good brakes, about how far will it take a heavy vehicle to stop after the brakes are applied?

150 feet

600 feet

250 feet

390 feet

10 / 10

If you must use low beam headlights at night, what should you do to ensure safe stopping?

Only use parking lights

Use high beams at all times

Drive slowly enough to stop within the distance you can see ahead

Drive at the posted speed limit regardless of visibility

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