Free South Carolina CDL Practice Tests

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CDL General Knowledge Test
Core

CDL General Knowledge Test

Must-have

All CDL applicants must take the general knowledge test to get their CLP. It is required to operate all commercial vehicles and is made to assess your traffic law knowledge, vehicle handling, and safety regulations, pre-trip vehicle inspections, and more.

50 questions

40 to pass test

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CDL Pre-Trip Inspection
Core

CDL Pre-Trip Inspection

The CLP applicant must demonstrate knowledge by inspecting critical vehicle components such as tires, brakes, lights, mirrors, fluids, steering, suspension, emergency equipment, coupling devices, and cargo securement.

50 questions

40 to pass test

Start Test
CDL Combination Vehicles
For A & B

CDL Combination Vehicles

Required for all applicants who plan to drive combination vehicles. You will be tested on handling, coupling and uncoupling, safety, and operating procedures specific to combination vehicles.

50 questions

40 to pass test

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Tanker Vehicles Endorsement Test
Extra

Tanker Vehicles Endorsement Test

For applicants who intend to operate commercial vehicles carrying liquids or gases in tanks exceeding 119 gallons individually, with a combined capacity of 1,000 gallons or more. The test evaluates your knowledge of handling tankers, proper loading and unloading procedures, inspecting tanks, and emergency response practices.

50 questions

40 to pass test

Start Test
Hazardous Materials Endorsement Test
Extra

Hazardous Materials Endorsement Test

This endorsement is necessary for transporting hazardous materials, such as explosive, poisonous, or flammable liquids. This test assesses knowledge of safe handling, emergency procedures, transport regulations, loading and unloading, emergency procedures, and more.

50 questions

40 to pass test

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School Bus Endorsement Test
Extra

School Bus Endorsement Test

Necessary to operate school buses transporting students to and from school or school-related activities. This test assesses student safety protocols, emergency evacuation practices, proper use of flashing lights and stop arms, railroad crossing safety protocols, and more.

50 questions

40 to pass test

Start Test
CDL Air Brakes
For A & B

CDL Air Brakes

Necessary for all CDL applicants planning to operate vehicles equipped with air brake systems. To pass this test, you must know how air brakes work, proper usage, dual and single air brakes, and how to perform safety checks.

50 questions

40 to pass test

Start Test
Double/Triple Endorsement Test
Extra

Double/Triple Endorsement Test

This endorsement is required to operate combination vehicles with double or triple trailers. It evaluates your knowledge of coupling and uncoupling multiple trailers, inspecting specialized equipment, safety protocols, managing trailer sway and rollover risks, and maintaining vehicle stability.

50 questions

40 to pass test

Start Test
Passenger Endorsement Test
Extra

Passenger Endorsement Test

The passenger endorsement test is necessary to operate commercial vehicles transporting 16 or more passengers.

50 questions

40 to pass test

Start Test

FMCSA-Certified

Zutobi is an approved FMCSA theory provider for all 50 states and Washington D.C. After completing a full CDL module with us, we will electronically notify the TPR that you are eligible to sit the corresponding CDL test or endorsement.

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CDL Classes and Endorsements

CLASSA
Class A vehicle icon

Combination Vehicle

Required for driving vehicles with a Gross Combination Weight Rating (GCWR) over 26,000 lbs, and for towing vehicles over 10,000 lbs. Includes tractor-trailers, flatbeds, tankers, livestock carriers, and double/triple trailers. May also allow driving some Class B and C vehicles with proper endorsements.

CLASSB
Class B vehicle icon

Heavy Straight Vehicle

Required for Single vehicles with a GCWR over 26,000 lbs, and for towing trailers under 10,000 lbs. Covers straight trucks, segmented buses, city buses, school buses, and tourist buses.

CLASSC
Class C vehicle icon

Small Vehicle

Vehicles under 26,000 lbs used to transport hazardous materials or 16+ passengers. Typically includes passenger vans and small HAZMAT vehicles.

Types of Endorsements

CODE
TYPE
DESCRIPTION
X
Combination
Combined endorsement for tank vehicles carrying hazardous materials.
S
School Bus
Mandatory for school bus drivers to transport students.
N
Tanker
Required for transporting liquids/gases in bulk tanks exceeding 1,000 gallons capacity.
T
Double/Triple Trailers
For towing double or triple trailer combinations.
H
Hazardous Materials
Required for vehicles transporting hazardous substances.
L/Z
Air Brakes
Indicates restrictions related to air brake-equipped vehicles.
P
Passenger
Required for transporting liquids/gases in bulk tanks exceeding 1,000 gallons capacity.
XCombination
Combined endorsement for tank vehicles carrying hazardous materials.
SSchool Bus
Mandatory for school bus drivers to transport students.
NTanker
Required for transporting liquids/gases in bulk tanks exceeding 1,000 gallons capacity.
TDouble/Triple Trailers
For towing double or triple trailer combinations.
HHazardous Materials
Required for vehicles transporting hazardous substances.
L/ZAir Brakes
Indicates restrictions related to air brake-equipped vehicles.
PPassenger
Required for transporting liquids/gases in bulk tanks exceeding 1,000 gallons capacity.

Free CDL Practice Tests