CDL COMBINATION PRACTICE TEST ARKANSAS

11. If you are being tailgated, you should:
drive on the shoulder.
speed up.
try to let the other vehicle pass.
turn on your taillights.
12. The emergency air line does NOT:
control the emergency brakes on combination vehicles.
cause the tractor protection valve to close when the emergency line loses pressure.
pump air into the relay valves, allowing the trailer brakes to be applied more quickly.
supply air to the trailer air tanks.
13. After starting the engine, oil pressure should rise to a normal level:
within 3 miles.
within seconds.
within 2 minutes.
within 6 minutes.
14. When backing a truck you should:
back and turn toward the right side.
always rely on your mirrors.
get out and walk around the vehicle before you begin to back.
look straight ahead.
15. When backing a tractor under a trailer:
you should lift the trailer off the fifth-wheel.
the end of the kingpin will be even with the top of the fifth wheel.
the trailer will be lifted slightly when the tractor backs under it.
the fifth-wheel will come out from under the trailer.
16. If driving a heavy vehicle, you should:
try to pass other vehicles going uphill.
stay in the right lane.
stay in the left lane.
avoid braking.
17. Most heavy vehicles require ________ change gears.
double clutching
double shifting
triple shifting
single clutching
18. Before leaving your vehicle unattended, you should:
Chock the wheels.
Apply the parking brake.
Remove the keys.
All of the above.
19. When backing a trailer, you should:
avoid braking.
pull-up frequently to reposition the vehicle.
not back up in a straight line.
turn the steering wheel toward the direction you want to go.
20. Under-loaded front axles can:
cause poor traction.
cause the drive wheels to spin easily.
make the steering axle weight too light to steer safely.
All of the above.
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