2026 California CDL Practice Test - 50 Must-Know Questions

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Updated California CDL General Knowledge Practice Test with 50 critical, must-know 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 CA CDL General Knowledge exam.

Chapters:
0:00 - Introduction
0:16 - Why must you avoid unnecessary idling in a commercial vehicle?
1:00 - How can cracked brake drums or discs affect your braking performance?
1:41 - What is the recommended following distance when operating a large...
2:27 - How should you respond to brake failure on a steep downgrade?
3:10 - When is it appropriate to use your four-way flashers in a commercial...
3:56 - What does it mean if your brake warning light or buzzer activates...
4:37 - What is a potential result of not maintaining proper torque on your...
5:18 - When coupling a trailer, why must you visually confirm that the...
6:05 - Why is it crucial to signal your intentions well in advance when...
6:54 - Under federal regulations, what is the maximum legal blood alcohol...
7:35 - How can you best manage space when stopping at traffic lights or...
8:19 - What is a critical step if you have to drive in foggy conditions?
8:59 - How can you reduce brake fade on steep downgrades?
9:46 - Why is it critical to keep your windshield and mirrors clean?
10:29 - What are some signs of a steering system defect in a commercial...
11:11 - What is a common indicator of a leaking or faulty exhaust system?
11:55 - Why are regular breaks recommended for commercial drivers on long...
12:39 - How does driving with underinflated tires affect vehicle handling?
13:23 - When approaching an intersection, what is a key step to ensure safety?
14:07 - Why is proper wheel alignment crucial for a commercial vehicle?
14:48 - Why is it important to know each state’s lane usage laws for...
15:33 - What must you do if you become drowsy or fatigued while driving?
16:13 - What does communicating your intentions to other drivers typically...
16:57 - Why should you adjust your seat and steering wheel before operating a...
17:46 - Why should you use extra caution when driving near pedestrians and...
18:43 - When are wheel chocks typically required or recommended?
19:22 - What is the proper method for braking on a long downgrade if your...
20:10 - Why should you use caution when traveling through work zones in a...
20:56 - What is a good rule of thumb for safe merging onto a highway with a...
21:44 - What is the recommended practice for shifting gears on railroad...
22:25 - What is one major hazard of driving a high-profile commercial vehicle...
23:07 - What is included in checking the security of your fuel tanks during a...
23:53 - Why should you regularly check the free play on slack adjusters in...
24:42 - Why is it recommended to use headlights in daytime under certain...
25:28 - If a collision appears unavoidable, what should a commercial driver...
26:12 - Why should you keep shipping papers or bills of lading easily...
26:53 - When should you downshift an automatic or manual transmission?
27:33 - What should you do if your vehicle starts to hydroplane?
28:13 - Why are tire checks particularly important during hot weather?
28:53 - What should you do if you encounter an aggressive driver or a road...
29:36 - How should you handle a front-wheel skid in a commercial vehicle?
30:17 - What is the purpose of the final walk-around inspection after parking...
30:59 - In what situation should you use your horn to communicate with other...
31:41 - Why should you use lower gears when climbing steep hills with a heavy...
32:23 - Which piece of emergency equipment are commercial drivers generally...
32:57 - Under which circumstance are you required to stop at railroad tracks,...
33:46 - When should you dim your headlights from high beam to low beam?
34:29 - Why is it important to inspect your seat belt during a pre-trip check?
35:08 - Why should you avoid sudden acceleration or braking on slippery roads?
35:50 - Why should you check your brakes for overheating after descending a...

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