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South Carolina General Knowledge Test

You'll face real-world conditions—from the Port of Charleston traffic to foggy I-26 mornings.

140
Questions
80%
To Pass
60
Minutes

140 questions · 60 min time limit · 80% to pass

Opens in a practice window — choose your mode inside.

JM

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026

All questions sourced from the official South Carolina CDL handbook and FMCSA regulations.

About the South Carolina General Knowledge Test

South Carolina's roads don't play nice. You'll deal with tight turns on I-385, heavy truck traffic near the Port of Charleston, and sudden storms that flood low-lying sections of I-95. The General Knowledge test covers the rules you need to survive those conditions.

Our practice test mirrors the actual SC DMV exam. Each question comes straight from the South Carolina Commercial Driver License Manual. You'll see 50 multiple-choice questions that test your grasp of vehicle inspections, basic control, and safe driving habits.

We've helped thousands of South Carolina drivers earn their CDL. Our students drive for local farms, distribution centers in the Upstate, and long-haul routes out of Spartanburg. They all say the same thing: practicing with real questions builds confidence.

Don't waste time with generic tests. This one's built for South Carolina's roads, weather, and regulations. Take it now and see where you stand.

South Carolina's commercial driving centers on I-85 (through the Upstate), I-26 (connecting Charleston to Columbia), and I-95 (running north-south through the state). The Port of Charleston is one of the busiest container ports on the East Coast. Our general knowledge practice test mirrors the official South Carolina DMV CDL written exam.

The Port of Charleston drives massive container drayage traffic on I-26, I-526, and US-78. The I-85 corridor through Greenville and Spartanburg is a major freight route connecting Atlanta to Charlotte. The South Carolina Department of Transportation manages these busy corridors. The exam tests space management, port-area driving, and following distance in heavy traffic.

Topics Covered

✓Vehicle inspection procedures - South Carolina troopers check your pre-trip skills hard, especially at the Greer weigh station.
✓Basic vehicle control - You'll need sharp backing and turning skills for Charleston's narrow docks and Greenville's tight lots.
✓Safe driving practices - Learn to handle crosswinds on I-26 and fog on I-77, both common hazards here.
✓Air brakes - Required for most South Carolina rigs hauling heavy loads from the Lowcountry ports.
✓Cargo handling - Know how to secure loads for the bumpy rural roads in the Pee Dee region.
✓Traffic laws - Understand South Carolina's unique rules for farm vehicles and school bus stops along two-lane highways.

Study Tips

Read the South Carolina Commercial Driver License Manual cover to cover. Don't skip the section on air brakes—it's almost always on the test. The SC DMV gives you a paper copy when you apply, or you can download the PDF on this page.

Practice with our test until you score 80% or higher three times in a row. Focus on the questions you miss. Many SC drivers fail because they rush through the 50-question test. Take your time; you have 60 minutes. Mark questions you're unsure about and come back to them.

Schedule your test at a SC DMV office that offers CDL exams. Some offices require appointments weeks in advance. Call ahead to confirm walk-in availability. Bring your permit, medical card, and application fee (cash or check only at some locations).

South Carolina Specific Information

  • South Carolina DMV offices require an appointment for the CDL General Knowledge test. You can book online at scdmvonline.com. Walk-ins aren't guaranteed, but some rural offices (like Conway or Walterboro) may accept them during slow hours. The test fee is $30 for the knowledge portion—pay with cash, debit, or credit card.

    You'll need to pass a vision screening first. Bring your glasses if you wear them. After passing the General Knowledge test, you'll get your CDL learner's permit. That permit lets you practice drive with a licensed CDL holder in the cab.

    The SC DMV now offers computer-based testing at most locations. You'll get instant results. If you fail, you can retake the test the next business day. There's a $10 retest fee. Don't show up hungover or tired—it's a waste of your time and money.

  • The South Carolina Department of Motor Vehicles requires a knowledge test for all CDL classes; the general knowledge exam is the foundation for every commercial license.
  • The Port of Charleston is a major East Coast container port — drayage traffic is heavy on I-26, I-526, and US-78.
  • The I-85 corridor through the Upstate (Greenville-Spartanburg) carries high freight volume; blind-spot management and following distance are critical.
  • Hurricane season can bring flooding and evacuation orders on coastal highways — the exam tests weather awareness.
  • South Carolina's timber and poultry industries generate heavy rural hauls on two-lane highways.

Frequently Asked Questions

Do I need an appointment to take the CDL General Knowledge test in South Carolina?
Yes, you'll need an appointment at most SC DMV offices. Book online at scdmvonline.com. Some rural offices might take walk-ins, but don't count on it.
What's the passing score for the South Carolina CDL General Knowledge test?
You need an 80% or higher. The test has 50 questions, so you can miss up to 10. Aim for 100% on our practice test to be safe.
How much does the South Carolina CDL General Knowledge test cost?
The knowledge test fee is $30. If you fail, a retest costs $10. Bring cash or a debit/credit card—some offices don't take checks.
Can I use the South Carolina CDL manual while taking the test?
No. The test is closed-book. You must memorize the manual. Our practice test helps you learn the material without the book in front of you.
What happens after I pass the General Knowledge test in South Carolina?
You'll get a CDL learner's permit. It's valid for 180 days. With that permit, you can practice driving with a licensed CDL holder beside you. Then you take the skills test.
JM

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026 · FMCSA-compliant content