MISSOURI CDL PRACTICE TEST - GENERAL KNOWLEDGE

21. When a vehicle is hydroplaning:
the clutch is stuck.
the tires lose their contact with the road.
the spray from large trucks reduces visibility.
22. When going down long, steep downgrades, you should:
only use the brakes.
try not to use the brakes.
downshifting and then use the brakes.
23. A tank endorsement is:
required for both liquids and gases.
only required when transporting liquids.
only required when transporting gases.
24. To test the service brake:
gently try to pull forward with the trailer parking brake on, then release the brake.
shift your transmission to a low gear, pump the brake pedal three times, then hold it down for five seconds.
push the brake pedal firmly while going about 5 mph.
25. To avoid becoming a distracted driver you should:
not turn off all communication devices.
not engage in complex conversations with others.
adjust all vehicle controls and mirrors while driving.
26. Which of the following statements about tire failure is true?
If the steering feels heavy, it may be a sign one of the rear tires has failed.
It can take a few seconds for your vehicle to react, and you might think it was some other vehicle.
Any time you hear a tire blow, you would be safest to assume it is not yours.
27. When checking the condition of wheels and rims during the pre-trip inspection, make sure that:
no more than two lug nuts are missing.
the end of the kingpin is even with the top of the fifth wheel.
no studs, spacers, clamps, or lugs are missing, bent, or broken.
28. Rims with welding repairs:
can be used for tires in the front of the vehicle.
can be used for tires in the rear of the vehicle.
are not safe.
29. When driving, you:
should only use turn signals if there is a vehicle behind you.
should always use turn signals to tell other drivers your intentions.
should carefully evaluate road and traffic conditions to decide if you should use turn signals.
30. When driving in a construction zone, if a construction worker is near the road, you should:
maintain a constant speed.
come to a complete stop.
further reduce your speed.
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