COMBINATION PRACTICE TEST - GA CDL

11. When you park trailers without spring brakes, you should use wheel chocks:
to prevent the transmission from shifting up.
to keep the trailer from moving.
to prevent overheating.
to prevent air from escaping.
12. Over-length loads:
require special transit permits.
may require special equipment such as "wide load" or flags.
require special driving care.
All of the above.
13. If you are feeling sleepy, you should:
pull off the road and rest or take a nap.
increase your speed to get to the destination quicker.
slow down and drive on the shoulder of the road.
None of the above.
14. If you discover a fire, before opening trailer doors you should:
use the fire extinguisher on the doors.
have a helper open the doors.
feel the doors to see if they are hot.
All of the above.
15. When the wheels of a trailer lock up:
the vehicle will gradually come to a complete stop.
the trailer will tend to swing around.
ABS will increase stopping power.
All of the above.
16. If the drive wheels start to skid:
push in the clutch to let them turn freely.
accelerate slightly to regain control.
use the brakes to slow down.
All of the above.
17. When backing a trailer, you should:
avoid using the brakes.
turn the steering wheel toward the direction you want to go.
turn the steering wheel in the opposite direction of the turn.
try to position your vehicle so you can back on a curved path.
18. Strong winds can make it difficult to stay in your lane especially when driving:
heavier vehicles.
lighter vehicles.
flatbed trailers.
vehicles with ABS.
19. Hydroplaning:
can occur at speeds as low as 30 mph.
never occurs at speeds below 40 mph.
only occurs at extremely high speeds.
only happens when tire pressure is higher than normal.
20. Which of the following may have reduced the clearances since the heights were posted at bridges and overpasses?
Rain
The weight of a cargo
Traffic
Repaving of the road
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