CDL PRACTICE TEST (SD) - GENERAL KNOWLEDGE TEST

21. If you are stopped and found to have a blood alcohol concentration (BAC) below .04 percent, you will be placed out of service for:
72 hours.
one week.
48 hours.
24 hours.
22. To make sure you always have overhead clearance, always be aware that:
some roads can cause a vehicle to tilt.
an empty vehicle is taller than a loaded one.
re-paving or packed snow may have reduced the clearances since the heights were posted at bridges and overpasses.
All of the above.
23. The earliest way to recognize that your trailer has started to skid is:
by releasing the brakes.
by checking the jackknife sensor.
by checking your mirrors.
by hearing squeaking noises from the wheels.
24. When driving at night you should dim your lights when following another vehicle within:
500 feet.
1 mile.
100 feet.
50 feet.
25. Which of these is NOT something you should check during the pre-trip inspection of the engine compartment?
Brake controls
Engine oil level
Coolant level in radiator
Worn electrical wiring insulation
26. The air tanks should be drained completely to remove:
the radiator cap.
carbon monoxide.
water and oil.
air.
27. If you are feeling drowsy, before driving you should:
wait at least 30 minutes.
drink some coffee.
drink soda.
get some sleep.
28. Which of the following helps keep the engine cool in hot weather?
Making sure the anti-lock braking system is on.
Making sure there is enough engine oil.
Driving faster to force more air into the radiator.
All of the above.
29. When you have to back, you should use a helper:
only when you back up with a trailer.
when you need to back on a curved path.
only when backing toward the right side.
whenever possible.
30. Another name for front-end header boards is:
head belt.
headache racks.
containerized racks.
cargo stopper.
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