WASHINGTON CDL DOUBLES TRIPLES PRACTICE TEST

11. During freezing weather, which area is most likely to be slippery after it rains?
Shaded areas.
Bridges.
All of the above.
12. Combination vehicles usually:
require more driving skill than single CMVs.
are easier to drive than single than single CMVs.
are shorter than single than single CMVs.
13. Texting is:
about as safe as adjusting the radio.
safer than talking on a cell phone.
the most dangerous distraction.
14. Retarders:
apply their braking power whenever you push on the accelerator.
help slow a vehicle and reduce brake wear.
help prevent accidents by applying extra braking power to the non-drive wheels.
15. When should you be particularly careful about high winds?
When emerging from a tunnel
When going downhill
When driving at night
16. Front-end header boards:
protect drivers from cargo in case of an accident or emergency stop.
should never be used.
protect drivers from spilled cargo.
17. For safe handling, the heaviest trailer should be:
behind the tractor.
the second trailer in a triple.
the last trailer.
18. A red triangle with an orange center means:
Law enforcement vehicle
The vehicle is hauling hazardous materials
Slow-moving vehicle
19. Which of these is more likely to rollover due to the "crack-the-whip" effect?
The last trailer of doubles
The last trailer of triples
The front trailer of 65 ft. conventional doubles
20. When coupling double trailers, if the second trailer does not have spring brakes, to set the trailer emergency brakes you should:
1. Disconnect the emergency line 2. Drive the tractor close to the trailer 3. Charge the trailer air tank 4. Connect the emergency line.
1. Connect the emergency line 2. Drive the tractor close to the trailer 3. Disconnect the emergency line 4. Charge the trailer air tank.
1. Drive the tractor close to the trailer 2. Connect the emergency line 3. Charge the trailer air tank 4. Disconnect the emergency line.
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