2026 CDL General Knowledge Practice Test - 50 Questions and Answers

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Updated CDL General Knowledge Practice Test with 50 questions and answers. This video helps you study for the CDL written test with realistic exam-like practice questions, correct answers, and clear explanations.

Study topics include basic vehicle control, safety, braking, road awareness, and other concepts commonly tested on the CDL General Knowledge exam.

Chapters:
0:00 - Introduction
0:12 - How often should a commercial driver check the load or cargo during a...
0:56 - What does the term “No-Zone” refer to?
1:39 - What is the proper method for braking on a long downgrade if your...
2:29 - How should you handle a front-wheel skid in a commercial vehicle?
3:08 - What is the minimum tread depth required for the front tires on a...
3:44 - What is the purpose of the final walk-around inspection after parking...
4:25 - What is the purpose of checking for the presence and security of your...
5:11 - What is the proper procedure for entering traffic from a stop in a...
5:59 - What does communicating your intentions to other drivers typically...
6:43 - How do you handle tailgaters while driving a commercial vehicle?
7:27 - What is a good rule of thumb for safe merging onto a highway with a...
8:16 - How should you approach a curve or exit ramp in a commercial vehicle?
8:56 - When are wheel chocks typically required or recommended?
9:39 - Why is it critical to keep your windshield and mirrors clean?
10:22 - What are some signs of a steering system defect in a commercial...
11:04 - What documents might a commercial driver be required to show during...
11:48 - What is the function of the Department of Transportation (DOT)...
12:31 - When backing a commercial vehicle, what is one key safety practice?
13:14 - What does "GVWR" stand for, and why is it important?
14:00 - What is the purpose of your Daily Vehicle Inspection Report (DVIR)?
14:46 - How can you reduce brake fade on steep downgrades?
15:33 - When should you dim your headlights from high beam to low beam?
16:17 - Why should you avoid traveling too closely beside another vehicle on...
17:04 - Which type of fire extinguisher is generally recommended for...
17:48 - What is the primary cause of skids in a commercial vehicle?
18:48 - How can you best manage space when stopping at traffic lights or...
19:33 - Why should you use extra caution when driving near pedestrians and...
20:14 - What is one major hazard of driving a high-profile commercial vehicle...
20:57 - When is it appropriate to use your four-way flashers in a commercial...
21:43 - Why are regular breaks recommended for commercial drivers on long...
22:25 - What type of cargo is most likely to cause a rollover risk if not...
23:05 - How should you test your parking brakes during a pre-trip inspection?
23:46 - Why must you avoid unnecessary idling in a commercial vehicle?
24:31 - What is the purpose of Anti-Lock Braking Systems (ABS) on commercial...
25:17 - When should you check the security of your trailer coupling?
25:54 - Why is it important to know each state’s lane usage laws for...
26:38 - What is one safe practice for turning right with a long commercial...
27:21 - Why is it important to check your load’s weight distribution...
28:05 - What is a critical step if you have to drive in foggy conditions?
28:45 - How should you respond to brake failure on a steep downgrade?
29:28 - When making a lane change, why is it vital to avoid lingering in...
30:13 - Why should you keep shipping papers or bills of lading easily...
30:56 - What can happen if you overload an axle on a commercial vehicle?
31:39 - In what situation should you use your horn to communicate with other...
32:22 - Why should you drain air tanks regularly in an air-braked commercial...
33:05 - What is a key factor in anticipating traffic flow when driving a...
33:50 - Why do commercial drivers need to be mindful of overhead power lines?
34:33 - Why should you avoid sudden acceleration or braking on slippery roads?
35:17 - What is a potential result of not maintaining proper torque on your...
36:00 - What should you do if you encounter an aggressive driver or a road...

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