Knowledge Test Class A #1
Class A Driving Test | South Carolina 2025 #1 Page 3 of 7
Train for FREE online with our South Carolina class A license test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a SC CDL class A permit in 2025, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that CDL class A requirements may vary from state to state.
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15 . Air tank drains should:
Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Manually operated air tank drains must be opened daily to remove this build-up.
16 . Mismatched tire sizes are acceptable on the rear axles.
When inspecting a vehicle's tires, you should verify that there are no tires of mismatched sizes.
17 . A vehicle equipped with an Anti-Lock Braking System (ABS) uses a ____ light to warn that the system is not working properly.
White
Anti-Lock Braking System (ABS) malfunction lamps are usually yellow. Even if the ABS isn't working properly, a driver will still have access to the vehicle's usual braking functions.
18 . What happens if you don’t pass the air brakes endorsement test?
If you do not take or pass the air brakes test, you will be restricted to operating vehicles without air brakes.
19 . What is the average driver’s reaction time?
The average driver has a reaction time between three-quarters of a second and one second. At 55 mph, this corresponds to a distance of 61 feet traveled.
20 . What should happen if the air pressure in the air brake system tanks falls below 60 psi?
The vehicle should stop.
On vehicles with air brakes, a low air pressure warning signal will come on if the pressure in the air tanks falls below 60 psi. On large buses, the signal may activate at 80 to 85 psi.
21 . When approaching a railroad crossing:
You should only worry about the track closest to your vehicle.
You should never rely only on warning signals to alert you to an approaching train. Never try to race a train to a crossing. If there are multiple tracks at a crossing, be sure to check all tracks in both directions before starting to cross.
See the exact questions that will be on the 2025 South Carolina DMV exam.
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2025 South Carolina | Frequently Asked Questions
To acquire a CDL Tank endorsement in South Carolina, you must first have a Commercial Driver's License (CDL). After that, you need to pass the Tank Vehicle endorsement test at a DMV office. This test covers the knowledge required to safely operate a tank vehicle, including inspecting tanks, handling bulk tanks, and driving tank vehicles.
Obtaining a CDL Tank license in South Carolina involves having a valid Commercial Driver's License (CDL) first. You must then study the Tank Vehicles section in the SC Commercial Driver's Manual. Afterward, schedule and pass the tank vehicle endorsement test at a SC DMV office. Once passed, you will receive your Tank endorsement to your CDL.
While South Carolina doesn't specifically require training or experience to get a CDL Tank endorsement, it's highly recommended. Knowledge and understanding of handling and operating tank vehicles are crucial for passing the endorsement test. Many applicants opt for professional training courses to prepare for the test and gain practical experience.
Yes, in South Carolina, you need to pass the Tank Vehicle endorsement test to get a CDL Tank endorsement. This written exam tests your knowledge about the safe operation of tank vehicles, including inspecting tanks, handling bulk tanks, and driving tank vehicles. It's an additional test beyond the general CDL exam.
The written test for the CDL Tank endorsement in South Carolina covers various topics related to tank vehicles. These include inspecting tank vehicles, understanding weight distribution and high center of gravity, handling liquid surges, driving on slippery surfaces, and emergency handling such as skid control and recovery.
The CDL Tank endorsement assessment primarily focuses on knowledge rather than specific driving skills or maneuvers. It evaluates your understanding of inspecting tank vehicles, safe driving practices, handling characteristics of tankers, and details about bulk packaging and loading/unloading cargo tanks. However, safe driving and maneuvering skills are generally assessed during the CDL road test.
Yes, drivers with a CDL Tank endorsement are subject to certain limitations. They can only operate commercial tank vehicles and are required to adhere to specific safety regulations. These include weight restrictions, proper securing of cargo, and handling hazardous materials. Violation of these regulations can result in fines, license suspension, and even criminal charges.
No, it's illegal to transport liquid or gas materials in a tank vehicle without a valid CDL Tank endorsement in South Carolina. This endorsement ensures that drivers have the necessary skills and knowledge to safely handle and transport these types of materials. Violating this requirement can result in severe penalties.
Yes, the CDL Tank endorsement can be added to your current Commercial Driver's License (CDL). You don't need a fresh application. However, you must pass the Tank Vehicle endorsement knowledge test. Once you pass the test, the endorsement will be added to your existing CDL.
Yes, handling hazardous materials with a CDL Tank endorsement requires adherence to specific regulations. Drivers must pass the Hazardous Materials (HazMat) endorsement knowledge test, submit to a TSA background check, and follow safety protocols when loading, unloading, and transporting hazardous materials. Non-compliance can result in penalties.
