CDL & commercial driving · free timed practice test · State DMV / FMCSA
Free CDL General Knowledge Practice Test
The CDL General Knowledge exam is the written knowledge test required before you can get a Commercial Learner’s Permit (CLP) and later a Commercial Driver’s License (CDL) for Class A or Class B vehicles. It covers vehicle systems, safe driving, cargo, and hours-of-service style…
Official-source aligned. Topic weights, timing, and pass rules follow published State DMV / FMCSA outlines. Questions are original UniPrep2Go study aids — not leaked official items. Verify on the official site ↗
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- Questions
- 60
- Time
- 75 min
- Pass target
- 70%
- Domains
- 4
- Exam body
- State DMV / FMCSA
- Status
- Live · free
CDL & commercial driving · State DMV / FMCSA
CDL General Knowledge Practice Test
60 Q · 75 min · 70% target
Sample CDL General Knowledge practice questions
These sample items mirror the domains in the timed CDL General Knowledge mock. Correct answers and explanations unlock inside the practice session.
Sample 1
Which of the following best describes an Anti-lock Braking System (ABS) primarily help a driver as tested on this exam?
- A. Maintain steering control during hard braking on slippery surfaces
- B. an Anti-lock Braking System (ABS) primarily help a driver always eliminates all investment, legal, and regulatory risk for every customer
- C. an Anti-lock Braking System (ABS) primarily help a driver has no application in US securities, insurance, or licensing markets
- D. an Anti-lock Braking System (ABS) primarily help a driver is identical to FDIC deposit insurance for every customer account
Sample 2
When making a right turn in a long combination vehicle, what helps prevent off-tracking into other lanes or the curb?
- A. Turn from the far-left lane without signaling
- B. Swing wide as needed while keeping the rear of the vehicle clear of hazards
- C. Cut the corner tightly to stay in one lane
- D. Accelerate through the turn without checking mirrors
Sample 3
For the CDL General Knowledge, railroad crossing safety for CMVs includes which principle? Select the best answer.
- A. Never race a train; stop when required and do not shift gears while crossing
- B. Always stop on the tracks if traffic ahead is heavy
- C. High gear is required on all crossings
- D. Trains can always stop quicker than trucks
Sample 4
For the CDL General Knowledge, if cargo shifts while you are driving, what should you do? Select the best answer.
- A. Increase speed to stabilize the load
- B. Ignore it if the trailer doors are closed
- C. Stop safely as soon as possible and resecure/rearrange before continuing
- D. Brake hard from highway speed immediately in your lane
Sample 5
On the CDL General Knowledge, what should you do if your tires blow out on a steer axle? Select the best answer.
- A. Slam on the brakes immediately and turn hard
- B. Hold the wheel firmly, ease off the accelerator, and steer to a safe stop
- C. Accelerate to straighten the truck
- D. Shift to neutral and leave the roadway uncontrolled
What is the CDL General Knowledge exam?
The CDL General Knowledge exam is the written knowledge test required before you can get a Commercial Learner’s Permit (CLP) and later a Commercial Driver’s License (CDL) for Class A or Class B vehicles. It covers vehicle systems, safe driving, cargo, and hours-of-service style rules from the FMCSA Commercial Driver’s Manual — not the skills/road test. States administer the test through their DMV or equivalent; you typically must pass General Knowledge (and any required endorsement knowledge tests) before scheduling skills testing.
Administered by: State DMV / licensing agency, using FMCSA Commercial Driver’s Manual topics (official site ↗)
Official format: Written (or computer-based) multiple-choice knowledge test; length and pass score vary by state. Skills/road testing is separate after you hold a CLP.
Official resources: FMCSA CDL · Find your state CDL manual
Who this exam is for
Candidates preparing for CDL General Knowledge who want a timed diagnostic with topic-level feedback.
How to prepare
Start with this free timed diagnostic to see which CDL General Knowledge domains are weak, then review the published State DMV / FMCSA outline on the official site and drill missed topics with the linked Anki deck before exam day.
Confirm current fees, eligibility, and scheduling with State DMV / FMCSA before you book the real exam.
Topic outline
Core domains candidates usually study for CDL General Knowledge: Vehicle systems & inspection, Safe driving & space management, Cargo securement & weight, Emergencies, hours & rules.
Vehicle systems & inspection
Safe driving & space management
Cargo securement & weight
Emergencies, hours & rules
About this free CDL General Knowledge Practice Test
A free 60-question CDL General Knowledge readiness check with topic scoring across vehicle systems, safe driving, cargo, and rules — for CLP / Class A–B knowledge prep. Use this free timed practice test as a baseline before exam day or before drilling the linked Anki deck.
Built for: Candidates preparing for CDL General Knowledge who want a timed diagnostic with topic-level feedback.
Topics on this practice test: Vehicle systems & inspection, Safe driving & space management, Cargo securement & weight, Emergencies, hours & rules.
- 60 timed multiple-choice questions
- 75-minute pacing target
- 70% pass threshold with topic breakdown
- Full answer review after you submit
Free timed mock with full topic report — no signup. After your score, join the linked Anki deck waitlist for the .apkg when it ships.
Join the CDL General Knowledge Anki waitlistCDL General Knowledge Practice Test — quick answers
What is the CDL General Knowledge exam?
It is the core written knowledge test for a Commercial Learner’s Permit / CDL. It checks whether you understand commercial vehicle operation, safety, and cargo rules before you take the skills test.
Is CDL General Knowledge the same as the skills test?
No. General Knowledge is a knowledge (written) exam. The CDL skills test (vehicle inspection, basic controls, and road test) is a separate step after you get a CLP and practice.
Do I need HazMat or passenger endorsements for General Knowledge?
General Knowledge is the base test. Endorsements such as HazMat (H), Passenger (P), or School Bus (S) have their own knowledge tests if your job requires them.
Is there a free CDL General Knowledge Practice Test?
Yes — UniPrep2Go hosts a free online CDL General Knowledge Practice Test with 60 timed questions, 75 minutes, a 70% pass target, topic scoring, and a full answer review report. Free timed practice test.
How many questions are on this free CDL General Knowledge Practice Test?
This UniPrep2Go practice test has 60 multiple-choice questions timed against a 75-minute target. Readiness check aligned to FMCSA Commercial Driver's Manual general-knowledge topics. Not a state DMV or FMCSA exam.
What score do you need on this CDL General Knowledge Practice Test?
The pass target on this practice test is 70%. Your report also breaks down performance by topic so you can see weak areas before the real exam.
More FAQAdditional format, scoring, and disclaimer questions
- Who should take this CDL General Knowledge Practice Test?
- Candidates preparing for CDL General Knowledge who want a timed diagnostic with topic-level feedback.
- Where can I take a CDL General Knowledge Practice Test online?
- UniPrep2Go hosts the Free CDL General Knowledge Practice Test at https://uniprep2go.study/mock-exams/cdl-general-knowledge-readiness-check with a timed runner and full readiness report.
- Is this official exam material?
- No. This is an independent readiness diagnostic from UniPrep2Go. It is not official exam-board material and does not award certification or guarantee a passing score.
- What does the report show after the mock?
- Your report shows a pass/no-pass verdict with explanation, topic diagnosis, pacing notes, full question review with explanations, and a repair plan that links to the Anki deck waitlist for spaced-repetition practice when the .apkg ships.
- Where do the questions come from?
- Original UniPrep2Go local bank aligned to FMCSA handbook topics.
Guides for this exam
State rules, test-day logistics, and study plans that point back to this practice path.