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CDL DOUBLES TRIPLES PRACTICE TEST FLORIDA

11. During freezing weather, which area is most likely to be slippery after it rains?
Bridges.
Roads that look wet.
Shaded areas.
All of the above.
12. Which of the following is most likely to roll over?
The rear trailer of a triple
The front trailer of a double
The middle trailer of a triple
The rear trailer of a double
13. If your vehicle thumps or vibrates heavily, it may be a sign that:
the brakes have failed.
the engine belt is loose.
one of the tires has gone flat.
you need to shift up.
14. You should test the coupling by:
disconnect the safety chains.
pulling against the pin of the second semitrailer.
applying the parking brakes so the rig will not move.
locking the pintle hook.
15. What is the most important reason to inspect your vehicle?
Your safety and that of other road users.
Vehicle inspection is required by federal and state laws.
Saving money by preventing costly repairs.
Achieving the best gas mileage.
16. When you turn suddenly, which trailer is most likely to turn over?
The rear trailer of doubles
The front trailer
The last trailer of triples
None of the above.
17. If the drive wheels begin to spin, you should:
take your foot off the accelerator.
accelerate smoothly and change gears as necessary.
apply your brakes all the way.
wait 4-5 seconds before applying the accelerator.
18. Most heavy duty vehicles use ___ air brake systems for safety.
triple
single
reduced
dual
19. To prevent rollover, you should:
drive slower around corners.
drive in the left lane whenever possible.
drive faster on ramps and off ramps.
All of the above.
20. When your vehicle starts to skid, you must take action to:
accelerate and countersteer.
use controlled braking.
use stab braking.
restore traction to the tires.
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