CDL DOUBLES PRACTICE TEST DISTRICT OF COLUMBIA

11. Headache racks:
protect you from being hit by your cargo.
can blind other drivers.
help you keep weights within legal limits.
None of the above.
12. What is true about tire chains?
You should watch the official video tutorial by the manifacturer before putting them on.
You must carry the at least 6 chains and extra cross-links.
You should learn how to put the chains on before you need to do it in snow.
All of the above.
13. When you back under a trailer:
make sure the trailer brakes are locked.
back the tractor slowly.
use lowest reverse gear.
All of the above.
14. For a cargo fire in a box trailer, you should:
open the doors immediately and use the fire extinguisher.
keep the doors shut.
use the fire extinguisher on the doors.
wait 10 minutes before opening the doors.
15. A red triangle with an orange center means:
The vehicle is hauling hazardous materials
Liquid tanker
Slow-moving vehicle
Law enforcement vehicle
16. The trolley valve should be used only:
in an emergency.
to prevent skids.
to test the trailer brakes.
in driving.
17. Texting is:
safer than  engaging in conversation with a passenger.
safer than talking on a cell phone.
the most dangerous distraction.
about as safe as adjusting the radio.
18. To reduce driver distraction, you should do all of the following except:
Plan your route before driving
Pre-program radio stations
Adjust mirrors before driving
Eat while driving.
19. Do NOT use the parking brakes:
to test that they work.
when you park for less than two hours.
if the brakes are very hot.
when you leave your vehicle.
20. Pre-trip inspections of doubles and triples should:
be done by the shipper.
take more time than inspecting straight trucks.
be done once a week.
take less time than inspecting straight trucks.
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