免费 Washington D.C. CDL 模拟考试——您的完整学习指南
一次通过 Washington D.C. CDL 许可证考试，达到 80% 以上
更新：2026年8月
您需要学习的内容
General Knowledge
CDL 考试的基础。涵盖交通法规、安全驾驶技术、车辆检查程序、货物处理以及每位商业驾驶员必须了解的联邦法规。
组合车辆
驾驶牵引拖车的必备知识。涵盖连接和分离程序、防侧翻、组合车辆检查以及拖挂拖车时的安全操作。
Air Brakes
配备气刹车的所有车辆都需要。涵盖气刹车系统的工作原理、双气刹系统、气刹车检查以及在各种条件下安全使用气刹车。
附加资格考试
HazMat
运输危险物料所需。涵盖标牌张贴、标签、装载程序、应急响应以及联邦危险品法规合规。
Tanker
驾驶用于散装运输液体或气体的罐车所需。涵盖安全装卸以及罐车操作特有的驾驶技术。
Doubles & Triples
拖拽双拖挂或三拖挂所需。涵盖多拖挂的连接和分离、安全驾驶实践以及多拖挂车组的检查程序。
Passenger
运营设计载客 16 人及以上车辆所需。涵盖乘客安全、上下车、紧急出口以及出车前检查要求。
免费 Washington D.C. CDL 模拟考试——您的完整学习指南
换车道时应该做什么？
- 换车道时速度要比车流低得多。
- 使用后视镜确保交通间隙足够大，以便您安全进入。
- 换车道时别发出什么信号。
与危险品运输相关的文件必须存放在___。
- 在驾驶员门袋里
- 附在遮阳板上。
- 在拖车上的箱子里。
以下哪项关于通过隧道的陈述是正确的？
- 保持窗户打开以获得新鲜空气。
- 关闭卡车内的所有灯。
- 当你出来时，可能吹来强风。
以下哪种车辆在转弯时更容易出现偏轨？
- 45英尺拖车的牵引车
- 28英尺箱式的卡车。
- 45英尺直卡车
在什么情况下你应该鸣喇叭？
- 如果有助于避免事故。
- 为了让别人知道你会迟到...
- 在路边跟朋友打招呼。
以下哪项有关酒精的说法是不正确的。
- 饮酒者可以控制其身体吸收酒精的速度。
- 酒精直接从胃进入血液。
- BAC（血液酒精浓度）由饮酒的速度、饮酒量和进食量决定。
如果您的车辆的任何一个钢板弹簧缺少____片或更多片钢板，则不允许使用。
- 1/3
- 1/4
- 1/2
选择有关危险品运输的正确说法。
- 任何运输危险品的卡车都必须有标志牌。
- 如果容器密封的，危险材料可以丢弃在普通垃圾桶里。
- 所有的危险物品都对健康和安全隐患。
要计算某人体内的酒精含量（BAC），你需要知道：
- 他们的身高。
- 他们喝酒的时间。
- 他们的体重
正确握方向盘的方法是什么？
- 一只手放在方向盘的顶部，另一只手放在膝盖上。
- 用膝盖，同时用手调整收音机。
- 用双手握住方向盘两侧。
您在准备什么？
选择一个或多个选项，以便我们向您展示需要参加的具体考试。
您需要学习的内容
附加资格考试
根据您计划操作的车辆或货物类型，您可能需要的额外附加资格。
您获得商业驾照的路径
要获得 CDL，您必须先学习并通过 DMV 的许可证考试。获得许可证后，您可以参加商用车辆驾驶课程并完成所需的培训。最后一步是通过正式的驾驶考试以获得 CDL。我们的模拟考试通过真实风格的题目帮助您备考 DMV 许可证考试，同时我们还提供额外的学习资料和有用的资源来指导您完成整个过程。
要在 Washington D.C. 获得 CDL，您必须在 Washington D.C. Department of Motor Vehicles 通过三项笔试——General Knowledge、Combination Vehicles 和 Air Brakes。与普通驾照许可证考试类似，这些是基于 Washington D.C. 官方 CDL 手册的限时多选题考试。
我们所有的练习材料均基于 Washington D.C. 官方 CDL 手册和联邦资源编制，由在商业运输行业拥有 10 年以上经验的专业人士策划。使用与真实考试格式一致的模拟考试进行学习是一次通过的最有效方法之一。
在此页面上，您可以找到所有三个部分的免费模拟考试。全部 2,500+ 道题和学习工具需在应用中订阅使用——请下载 CDL Help 应用。
Washington D.C. CDL 笔试：形式与要求
CDL 笔试（理论考试）在 Washington D.C. 与全国遵循相同的联邦标准。以下是您可以预期的内容。
各项考试题数
及格分数、题目数量和考试形式均为联邦标准（FMCSA，49 CFR 第 383 部分）。请务必在您所在州的官方 CDL 手册中确认最新详情。
Washington D.C. CDL 费用与发证
州收费截至 2026年6月。金额会变动 — 请向官方机构确认当前费用。
Washington D.C. CDL 要求
State DMVState DMVState DMVState DMV49 CFR §391.11
- Citizenship and immigration-status requirements apply and changed under 2026 federal rules — verify your eligibility directly with the District of Columbia Department of Motor Vehicles (DC DMV) before applying (see Official Sources below).
- Must be at least 21 years old for a standard DC CDL, or 18 for the District’s intrastate-only CDL (which carries no H, N, P, S or T endorsements and requires two years of driving experience).
- Must already hold a valid DC non-commercial driver license (NCDL); if it is not a REAL ID you also present proof of your Social Security number and two proofs of District residency.
- Must be a U.S. citizen or hold a valid permanent resident card. If you are legally present under a USCIS-approved program without permanent-residency proof, DC DMV issues a CDL marked non-domiciled.
- Provide a 10-year driver history report from every state that has licensed you — DC DMV checks driving history in all 50 states.
- Complete the mandatory Human Trafficking Awareness training (District law, DCMR Title 18 § 1303, effective July 12, 2021) — about 15 minutes online — before DC DMV issues a commercial learner permit.
- Since June 23, 2025, your DOT medical certification must be submitted electronically by a certified medical examiner through FMCSA’s National Registry II portal; DC DMV no longer accepts a paper card from you. Recertify every two years.
- Take the knowledge tests at the Deanwood Road Test/CDL Services Office — English only, $10 per test whether you pass or fail, with a 90-minute limit on the general knowledge test and 60 minutes on each endorsement test.
- Fail a knowledge test and you wait 3 calendar days to retry; six failures within 12 months blocks a seventh attempt until 12 months after the first failure.
- Purchase the $78 commercial driver learner permit. You must hold it at least 30 calendar days — double the federal 14-day floor — before DC DMV will even let you schedule the road skills test. It is valid one year and non-renewable.
- Entry-Level Driver Training is required for a first Class A or B CDL, a Class B-to-A upgrade, and a first School Bus, Passenger or Hazmat endorsement; for Hazmat the training must finish before the knowledge test, not the skills test.
- The road skills test is given at a leased lot in Landover, Maryland (the District has no CDL road course of its own) — book online or by calling 311, bring a CDL-licensed escort 21 or older, and pay $10 whether you pass or fail. A money order is the only payment the lot accepts.
- Pay the $117 commercial driver license fee — one price for Class A, B and C — to upgrade the permit to an eight-year CDL after passing the road skills test.
Washington D.C. 官方 CDL 手册
The official DC DMV Commercial Driver License Manual (2005 CDL Testing System, version July 2014) covers every topic tested on the District's CDL knowledge exam — but its dense, reference-style format makes it difficult for self-study. A more effective preparation tool is our set of General Knowledge practice tests. Our free District of Columbia CDL permit practice test is structured to closely match the format and content of the official exam. Each test includes 20 questions covering critical topics such as vehicle inspection, safe driving techniques, air brakes, cargo securement, driving emergencies, hazardous conditions, and DC-specific commercial driving regulations. Unlike the official test, every practice question comes with a helpful hint and a detailed explanation of the correct answer — so you learn from every question, not just the ones you get right.
- 完整的 CDL 法规和 Washington D.C. 特定要求
- 安全驾驶技术、车辆检查和货物处理
- 所有附加资格类别和考试要求
邻近州的 CDL 模拟考试
在 Washington D.C. 附近考试？也可以练习邻州的 CDL 考试。
非居民 CDL 信息
关于 Washington D.C. 非居民商业驾照的重要信息。
关于非居民 CDL 的联邦法规正在快速变化。以下信息反映了最新已知的州级措施。
DC DMV states its non-domiciled rule directly on its eligibility page: if you do not have proof of lawful permanent residency but are legally in the country under a program approved by U.S. Citizenship and Immigration Services, District law requires DC DMV to issue you a CDL marked as non-domiciled rather than refuse you one outright.
Under the FMCSA final rule published February 13, 2026 (effective March 16, 2026), eligibility for a foreign-domiciled CLP or CDL nationwide is limited to H-2A, H-2B and E-2 status, Employment Authorization Documents no longer qualify on their own, and licensing agencies must verify status through the federal SAVE database. DC DMV has not published a separate statement narrowing or pausing its own non-domiciled issuance beyond this federal baseline. CDL Help does not provide legal or immigration advice, and these requirements are changing quickly — confirm your specific situation directly with DC DMV and the official FMCSA resources linked below.[FMCSA Final Rule]
英语语言能力 (ELP)
联邦 ELP 执法适用于全国所有 CDL 持有者。
联邦 ELP 执法适用于全国所有 CDL 持有者。以下是 Washington D.C. 的执行方式。
DC DMV requires every CDL knowledge test to be taken in English — no other language option is published. All Commercial Driver License holders are also subject to federal English Language Proficiency (ELP) enforcement, which took effect on June 25, 2025: roadside inspectors conduct a two-step assessment (a conversational English interview with no interpreters or translation tools, followed by a highway traffic sign recognition test), and a driver who fails either step is placed out of service under CVSA guidelines. DC CDL applicants should be prepared to demonstrate English proficiency during any roadside inspection or compliance review.
在 CDL Help 应用中完成备考
网页上的进度在完成后不会保存。订阅后，应用会记住你答错的每道题，并通过间隔复习再次出题，同时解锁全部 2,500 多道题目。免费开始。
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