This free CDL license practice test will help you check your understanding of concepts related to the safe operation of a semi-truck in South Carolina.
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#1. True or False: Federal and state laws require that drivers inspect their vehicles.
#2. You need at least ______ inch tread depth in every major groove on front tires. You need 2/32 inch on other tires.
#3. Rust around wheel nuts may mean the nuts ___________.
#4. True or False: The amount of brake pressure you need to stop the vehicle will depend on the speed of the vehicle and how quickly you need to stop.
#5. Because you cannot see everything behind your vehicle, backing is __________ dangerous.
#6. They reduce brake wear and give you another way to slow down.
#7. True or False: Many large vehicles have __________ mirrors that show a wider area than flat mirrors.
#8. There are 3 good rules for using turn signals, which of the following are included in these 3 rules.
#9. True or False: It’s OK to help out others by signaling when it is safe to pass.
#10. If you find yourself being tailgated, you can do this to reduce the chances of an accident:
#11. True or False: Strong winds make it difficult to stay in your lane. The problem is usually worse for heavier vehicles.
#12. Large vehicles can hit other vehicles or objects during turns because of wide turning and __________.
#13. A hazard is any road condition or other road user (driver, motorcyclist, bicyclist, and pedestrian) that is a possible __________.
#14. Every registered motor vehicle must have at least 2 mirrors, including 1 attached to the left-hand side, and located to give a clear view of the roadway to the rear for a distance of at least __________.
#15. __________ is a thin layer of ice that is clear enough that you can see the road underneath it.
#16. True or False: Braking in a curve is dangerous because it is easier to lock the wheels and cause a skid.
#17. __________ is the number one cause of injury and death in roadway work zones.
#18. True or False: You should use low beams whenever you can.
#19. Use high beams when it is safe and legal to do so. Use them when you are not within __________ of an approaching vehicle.
#20. The 2 types of railway crossings are
#21. The round warning sign placed ahead of a public railroad-highway crossing is colored __________.
#22. True or False: Forcing an automatic transmission into a lower gear at high speed could damage the transmission and also lead to loss of all engine braking effect.
#23. The use of brakes on a long and/or steep downgrade is only a supplement to the braking effect of __________.
#24. True or False: Stab braking, can only be done in vehicles with antilock brake systems (ABS).
#25. Why do most hydraulic brake failures occur?
#26. By far the most common skid is one in which the __________ lose traction through excessive braking or acceleration.
#27. __________ and duals that touch are 2 causes of tire fires.
#28. __________ causes most front-wheel skids.
#29. You may __________ drink while on duty, nor consume any intoxicating beverage, regardless of its alcohol content, within 4 hours before going on duty.
#30. True or False: Stopping is not always the safest thing to do in an emergency.
#31. BAC is determined by the amount of alcohol you drink, how fast you drink it and your __________.
#32. When communicating HAZMAT risks, the shipper uses a shipping paper and __________-shaped hazard labels to warn dockworkers and drivers of the risk.
#33. __________ are signs put on the outside of a vehicle that identify the hazard class of the cargo.
#34. After starting, inspect the cargo and its securing devices again within the first __________ after beginning a trip. Make any adjustments needed.
#35. The total weight of a single vehicle including its load.
#36. The value specified by the manufacturer as the loaded weight of a combination (articulated) vehicle.
#37. True or False: A low center of gravity means you are more likely to tip over.
#38. __________ is used in the front, back, and/or sides of a piece of cargo to keep it from sliding.
#39. On flatbed trailers cargo should have at least one tie-down for each __________ of cargo.
#40. True or False: There are 2 basic reasons for covering cargo, to protect people from spilled cargo and to protect the cargo from weather.
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