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HI CDL DOUBLES TRIPLES PRACTICE TEST

11. When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?
The air could leak out of the trailer air tank, releasing its emergency brakes.
if you don't use wheel chocks, supply air will be sent to the service line instead of going to charge the trailer air tanks.
You may not notice a major leak in the service line until you try to put the brakes on.
12. How should you apply the brakes when going down a steep downgrade?
Apply the brakes as hard as you can without locking the wheels.
Apply the brakes when you reach the bottom of the downgrade.
Apply the brakes whenever you reach your safe speed, until your speed has been reduced to 5 mph below your safe speed.
13. To reduce the chance of rollover, you should:
put the lightest parts of the cargo under the heaviest parts.
distributed the cargo as low as possible inside the trailer.
place the cargo as high as possible inside the trailer.
14. Weight that is loaded so there is a high center of gravity:
reduces the chance that the load will shift to the side or fall off.
causes greater chance of rollover.
makes a vehicle easier to handle.
15. Which of the following is a good way to avoid becoming an aggressive driver?
Keep your following distance reasonable.
Be realistic about your travel time.
All of the above.
16. ABS:
does not decrease your stopping distance.
helps you increase your following distance.
helps you increase your average speed.
17. Foundation brakes are used:
at each wheel.
only with the right wheels.
only with the front wheels.
18. To prevent a rollover, the driver should:
drive slowly around corners, on ramps, and off ramps.
make quick lane changes if possible.
drive on the shoulder if possible.
19. Excessive use of the service brakes results in overheating. Too much heat can:
cause the brakes to grab.
cause the brakes apply unevenly.
make the brakes stop working.
20. If a tire fails while you are driving, you should:
stay off the brake until your vehicle has slowed down.
call your supervisor for instructions.
stop on the roadway if possible.
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