CDL Quiz 3

1. Before a trip, to prevent drowsiness, you should
Schedule trips for the daytime hours.
Avoid medications that cause drowsiness.
Get 8–9 hours of sleep.
Do all of the above.

2. What is the penalty for your first conviction for driving under the influence (DUI)?
Lose CDL for 1 year, if DUI while driving a CMV
Lose CDL for 1 year, if DUI while driving your personal vehicle
Lose CDL for 3 years, if DUI while transporting hazardous materials
All of the above

3. What is a common cause of tire fires?
Overinflated tires
Underinflated tires
Cold tires
All of the above

4. When beginning a long downgrade, which of the following should influence your choice of speed?
The total weight of the vehicle and its cargo
The road conditions
The steepness of the grade
All of the above

5. Which of the following should you NOT do if you experience a tire failure?
Stay off the brake pedal.
Be aware that a tire has failed.
Immediately brake hard.
Hold the steering wheel firmly.

6. You don’t want to be a distracted driver, so you
Avoid using your cell phone until you reach your destination.
Have all your emotionally difficult conversations in the first hour of driving.
Read maps or use your phone only when there are no other vehicles around you.
Smoke, eat, and drink on straight portions of the road.

7. Which of the following are likely to get stuck at a raised railroad crossing?
Moving van
Car carrier
All of the above

8. Signs of distracted drivers include
Vehicles constantly traveling above the speed limit.
Vehicles exiting the roadway.
Drivers having conversations with passengers.
Drivers listening to overly loud music.

9. If you are confronted by an aggressive driver, you should
Ignore rude gestures and refuse to react negatively.
Call the police from your cell phone if you can do it safely.
Avoid eye contact.
Do all of the above.

10. The most important hand signal you should agree on with a helper is
“Turn up the music.”

11. Your truck has a dual air system, and one of the systems loses its pressure. What will happen?
The brake drums will not be fully pressurized.
Either the front or rear brakes will not be fully operational.
The manual slack adjusters of the S-cam brakes will not be set properly.

12. The most common cause of serious vehicle skids is
Overinflated tires.
Poorly adjusted brakes.
Driving too fast for road conditions.

13. What is your most valuable way to see the sides and rear while driving?
Look out the window.
Check your mirrors regularly.
Get out and inspect the areas.

14. A car suddenly cuts in front of you, creating a hazard. What should you NOT do?
Honk and stay close behind the car.
Slow down to prevent a crash.
Signal and change lanes to avoid the car if possible.

15. You are testing the stopping action of service brakes on a hydraulic system. Which of these can mean there is a problem?
The brake pedal goes to the floor.
The vehicle pulls to one side when the brake pedal is pressed.
Both of these are correct.

16. What is the minimum tread depth for front tires?
4/32 inch
2/32 inch
1/32 inch

17. Which of these is correct regarding brake shoes?
Brake shoes should be larger than a quarter on the steering axle.
Brake shoes should have the same thickness as a penny.
Brake shoes should not be worn dangerously thin.

18. How does the height of the vehicle’s center of gravity affect safe handling?
Trucks with a high center of gravity can roll over at the posted speed limit for a curve.
Trucks with a high center of gravity can get stuck on railroad tracks.
Trucks with a high center of gravity can stop faster.

19. The road you are driving on becomes very slippery because of glare ice. Which of these is a good thing to do in such a situation?
Stop driving as soon as you can safely do so.
Apply the brakes often to keep the linings dry.
Downshift to stop.

20. Which of these is a danger of crossing railroad tracks on dirt roads?
You could get hung up halfway across the tracks.
The ground underneath the tracks might not be stable.
Your tires could sink into the dirt and not cross the tracks.