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Doubles Triples Test MO - CDL Practice Test

11. When inspecting the coupling, how much space should there be between the upper and the lower fifth-wheel?
½ inch
None.
It depends on the trailer
12. In your mirror, you see a car approaching from the rear. The next time you check your mirror, you don't see the car. If you wish to change lanes, you should:
assume the car left the roadway and change lanes as normal.
ease into the other lane slowly so the other car can get out of the way.
wait until you are sure the car isn't in your blind spot.
13. What is true about tire chains?
You should learn how to put the chains on before you need to do it in snow.
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.
14. If you are caught in strong winds, you should:
keep a strong grip on the steering wheel and slow down or pull off the roadway.
speed up while keeping a strong grip on the steering wheel.
immediately take your foot off the accelerator.
15. Which of the following road surfaces freezes first?
Open roads
Underpasses
Bridges
16. Rollovers happen when drivers:
brake too hard.
turn too fast.
turn too slowly.
17. Combination vehicles usually require _________ single commercial vehicles.
the same level of skill as
more driving skill than
less driving skill than
18. When driving double and triple trailers, drivers should:
allow more following distance.
steer gently and go slowly around corners.
All of the above.
19. If brakes fail on a long downgrade, you should:
use an escape ramp if it is available.
turn off the engine as soon as you.
pump the brake pedal 3 times.
20. Because of the "crack-the-whip" effect, doubles and triples:
are more likely to run out of gas than other combination vehicles.
are much slower than other combination vehicles.
are more likely to turn over than other combination vehicles.
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