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19. You are checking your tires for a pre trip inspection. Which of these statements is true?
a. Tires of mismatched sizes should not be used on the same vehicle.
b. Radial and bias-ply tires can be used together on the same vehicle.
c. Dual tires should be touching each other.
d. 2/32 inch tread depth is safe for the front tires.
Commercial Drivers License CDL Test General Knowledge Sample Practice Questions – download free.
20. The center of gravity of a load:
a. Is only a problem if the vehicle is overloaded.
b. Should be kept as high as possible.
c. Can make a vehicle more likely to tip over on curves.
d. All of the above.
21. A moving vehicle ahead of you has a red triangle with an orange center on the rear. What does this mean?
a. The vehicle is hauling hazardous materials.
b. A student driver is driving it.
c. It is a law enforcement vehicle.
d. It may be a slow moving vehicle.
22. If a straight vehicle (no trailer or articulation) goes into a front wheel skid it will:
a. Slide sideways and spin out.
b. Go straight ahead even if the steering wheel is turned
c. Go straight ahead but will turn if you turn the steering wheel.
d. Likely do any of the above.
23. Which of these statements about escape ramps is true?
a. They protect equipment and cargo from severe damage.
b. They are designed to prevent injury to drivers and passengers.
c. They are used to stop vehicles that lose their brakes on downhill grades.
d. All of the above are true.
24. Cargo covers:
a. Protect people from spilled cargo.
b. Protect cargo from weather.
c. May be required by law.
d. All of the above.
25. A vehicle is loaded with most of the weight on the steering axle. What may result?
a. A need to disconnect the steering axle brakes.
b. Better handling
c. Too little traction on the steering axle.
d. Hard steering and possible breakdown.
26. Whether or not you load and secure your load yourself, you are responsible for:
a. Knowing your cargo is securely tied down and covered
b. Inspecting your cargo
c. Recognizing overloads and poorly balanced weight
d. All of the above
CDL Test sample Practice Questions, Answers and Solutions.
27. You are driving on a straight, level highway at 50 mph. There are no vehicles in front of you. Suddenly a tire blows out on your vehicle. What should you do first?
a. Begin light braking.
b. Begin controlled or stab braking.
c. Stay off the brake until the vehicle slows down on its own.
d. Quickly steer onto the shoulder.
28. When checking the bus seats, what are you looking for?
a. To insure they are securely fastened to the bus.
b. To see if they have been removed.
c. To insure the seat and back portions are not loose.
d. All the above.
29. How far can the board of education make a student walk to their assigned pick up location?
a. 1 mile
b. 1/2 mile
c. 100 yards
d. 500 yards
30. Which of these statements about engine overheating is true?
a. You should never remove the radiator cap on a pressurized system.
b. If your engine overheats within 20 miles of the end of your trip, you should complete the trip and then check the problem.
c. Antifreeze is not needed when the weather is warm.
d. You should never shut off an overheated engine until it cools.
31. Which of these items is checked in a pre trip inspection?
a. Whether all vehicle lights are working and are clean.
b. Cargo securement.
c. Wiper blades.
d. All of the above.
32. The new BAC (Blood Alcohol Concentration) for commercial drivers to be Considered intoxicated when driving a commercial vehicle is:
a. .01
b. .04
c. .05
d. .10
33. Which of these is a good driving rule for work zones?
a. Turn on you flashers / hazard lights
b. Use your brake lights to warn drivers behind you.
c. Drive slowly
d. All of the above
34. You must drive on a slippery road. Which of these is a good thing to do in such a situation?
a. Apply the brakes during turns.
b. Slow down gradually.
c. Use a smaller following distance.
d. All the above.
Commercial Drivers License CDL Test General Knowledge Sample Questions
35. Dry bulk tanks require special care because:
a. The load can shift
b. They have a high center of gravity
c. Both of the above
d. None of the above
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