1 . If being tailgated, you should open up your following distance.

True
False

2 . A driver may not operate a CMV with a minimum blood alcohol concentration (BAC) of 0.04 percent.

True
False

3 . If stopped on the side of the road, how should you alert other motorists?

Rely on your taillights.
Sound your horn.
Use your four-way emergency flashers.
Keep the driver's side door open.

4 . The only way to become sober after drinking is to wait.

True
False

5 . In very hot weather, the air pressure in tires may increase.

True
False

6 . When driving under wet conditions, what does a lack of spray from other vehicles indicate?

Ice has formed on the road.
The pavement is dry.
The spray is caught on the underside of the vehicle.
The tires have soaked up all the moisture.

7 . As temperatures begin to rise and ice on road surfaces begin to melt:

It is especially safe to drive.
The road will become more slippery.
Traction will increase.
It will be easier to identify slippery spots.

8 . Operating a commercial motor vehicle with a minimum blood alcohol content (BAC) of ____ is illegal.

0.02 percent
0.04 percent
0.08 percent
0.12 percent

9 . Black ice is usually very thick.

True
False

10 . When driving on packed snow, you should reduce your speed:

By at least one-half.
By about one-third.
By about one-quarter.
By about one-eighth.

11 . A low air pressure warning signal should activate:

When tank pressure falls below 120 psi.
When tank pressure falls below 55 psi.
When tank pressure falls below 10 psi.
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12 . When should you check and adjust your mirrors?

Before starting a trip
While driving
After a trip
Mirrors do not need to be adjusted.

13 . When driving a 50-foot truck at 50 mph, you should maintain a following distance of at least:

Four seconds.
Five seconds.
Six seconds.
Eight seconds.

14 . A vehicle must have at least two mirrors.

True
False

15 . Truck tractors with air brakes built on or after March 1, 1997 must be equipped with:

ABS.
A flag.
White warning lamps.
GPS.

16 . Empty trucks often take longer to stop than fully-loaded trucks.

True
False

17 . Frequent blinking may be a sign of fatigue.

True
False

18 . Repeatedly rubbing your eyes could be a sign of fatigue.

True
False

19 . When trying to put out an electrical fire:

Use water.
Use a B or C extinguisher.
Use an X extinguisher.
Use a Q extinguisher.

20 . In very hot weather, tires may catch fire.

True
False