CDL General Knowledge
- 120 free practice questions, every one explained · no signup required
- Full-length timed mock exam (50 questions, 60 minutes) — free
- Study guide: free to read online · PDF + EPUB download $9.99 one-time
- Written from: state Department of Motor Vehicles (under FMCSA standards)
- Languages: English
- Last updated: September 2026
Practice questions
Learn by topic with instant explanations. Free, no signup.
Full timed mock exam
A 50-question, 60-minute simulation to test your readiness.
Free practice for the CDL General Knowledge exam. Original questions in English, 中文 and Español, covering the official content areas — with a full timed mock exam.
CDL 通用知识笔试通常约 50 道选择题,及格需至少答对 80%——80% 的及格线由联邦法规 49 CFR §383.135 统一规定,而确切题量因州而异。
The CDL General Knowledge exam is about 50 questions, 80% to pass. Practice by topic here, then take the full timed mock exam to gauge your readiness. Free, no signup.
What the CDL General Knowledge exam covers
27%
Safe Driving
23%
Vehicle Inspection
18%
Control & Operation
17%
Emergencies & Hazards
15%
Regulations & Health
备考资源
Find your state's DMV CDL page →推荐备考 — 书籍与工具
- Barron's CDL: Commercial Driver's License Test
Trusted prep brand covering the CDL general-knowledge test.
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常见问题
PrepPass 的CDL General Knowledge练习是免费的吗?
是的 —— PrepPass 上所有CDL General Knowledge练习题、学习指南和课程都免费。此外还免费包含一次完整的限时模拟考试。
PrepPass 有多少道CDL General Knowledge练习题?
PrepPass 目前有 120 道原创CDL General Knowledge练习题,分布在 5 个主题板块,每道题都附有答案解析。
PrepPass 的CDL General Knowledge备考内容有哪些语言?
英语、中文、西班牙语(Español)和越南语(Tiếng Việt)。
PrepPass 的CDL General Knowledge题目是怎么编写的?
全部由 PrepPass 依据公有领域法规和官方考试大纲原创编写 —— 绝不照搬真实考题。 了解我们的出题方法 →
PrepPass 与发证机构或考试机构有关联吗?
没有。PrepPass 是独立的学习资源,与任何发证机构或官方考试机构均无关联、未获其认可、也无任何隶属关系。
可以用手机练习CDL General Knowledge吗?
可以 —— PrepPass 可在任何手机或电脑浏览器中使用,无需下载 App。