Vehicle Equipment & Safe Operation — South Carolina
South Carolina CDL practice test: 447 free practice questions (Based on the official driver handbook). The official format is not yet verified; check the official site before your test. Vehicle Equipment & Safe Operation: 197 questions.
Brakes, tires, lights, mirrors, seat belts, child seats and basic vehicle control.
This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines.
| Topic / Metric | Value |
|---|---|
| Topic | Vehicle Equipment & Safe Operation |
| License test | South Carolina CDL permit (CLP) knowledge tests |
| Topic questions | 197 (44% of 447 total) |
| Review status | This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines. |
Official handbook
Not yet verified
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Questions (197)
1. Brake pads should:
- Be covered with grease.
- Be covered with oil.
- Be covered with brake fluid.
- Not have any oil or grease on them. ✓
Answer: D. Not have any oil or grease on them.
Brake pads should not have any oil or grease on them. The handbook lists shoes or pads with oil, grease, or brake fluid on them as a bad brake condition. It also says contaminants like grease and oil can reduce braking friction and may create a fire hazard. That is why brake pads are inspected for contamination and should stay clean rather than coated with anything slippery.
2. A vehicle equipped with an Anti-Lock Braking System (ABS) uses a ____ light to warn that the system is not working properly.
- Green
- Yellow ✓
- Orange
- White
Answer: B. Yellow
An ABS-equipped vehicle uses a yellow malfunction lamp to warn you that the system is not working properly. The handbook says vehicles with ABS have yellow malfunction lamps that tell you if something isn't working. On tractors, trucks, and buses that lamp sits on the instrument panel; on trailers it is on the left side, at the front or rear corner. A lamp that stays on after the bulb check, or comes on once you are moving, means you may have lost ABS control at one or more wheels. Color matters here: the warning lamp is yellow, not another color.
3. During a pre-trip inspection, belts in the engine compartment should be:
- Loosened.
- Checked for tightness. ✓
- Inspected only if they seem frayed.
- Left alone and not inspected.
Answer: B. Checked for tightness.
During a pre-trip inspection, belts in the engine compartment should be checked for tightness. The handbook's engine compartment checklist says to check belts for tightness and excessive wear, including alternator, water pump, and air compressor belts. It also says to learn how much give the belts should have and check each one. Another section explains that pressing on v-belts checks tightness, and loose belts will not turn the water pump or fan properly, which can lead to overheating. The same section says to look for cracking or other signs of wear.
4. Which gas would cause concern due to a faulty exhaust system?
- Oxygen
- Carbon monoxide ✓
- Nitrogen
Answer: B. Carbon monoxide
5. When the spring brakes are on, you should never:
- Turn on the lights.
- Turn off the vehicle.
- Push down the brake pedal. ✓
Answer: C. Push down the brake pedal.
You should never push down the brake pedal while the spring brakes are on. The handbook's spring brake section says the springs hold the brakes on by mechanical force. If you also press the brake pedal, the spring force and air pressure can combine and damage the brakes. Some systems are built to prevent that, but not all are, and even those may not always work. Because of that, the handbook advises making it a habit not to press the pedal when the spring brakes are applied.
6. What do the two systems of a dual air brake system share?
- Hoses
- An air compressor ✓
- Air tanks
Answer: B. An air compressor
The two systems share an air compressor. The handbook describes a dual air brake system as two separate systems that use one set of brake controls. It says each system has its own air tanks, hoses, and lines, so those parts are not shared. The compressor is the air source that pumps air into the storage tanks. That leaves the compressor as the part common to both systems. The handbook does not say "shared compressor" word for word, but the separate tanks and hoses point to it.
7. The parking brake should be:
- Used whenever you park your vehicle. ✓
- Used while driving.
- Set when driving in bad weather.
- Removed.
Answer: A. Used whenever you park your vehicle.
The parking brake should be used whenever you park your vehicle. The air brakes section tells you plainly to use the parking brakes whenever you park. It describes the parking brake control as the way to apply the spring brakes, which are held on by mechanical force rather than air pressure. That is why the habit is tied to parking, not to normal driving. The bank answer matches this instruction.
8. When leaving your vehicle unattended:
- The parking brake should be used. ✓
- The parking brake only needs to be used if the vehicle is parked on a slope.
- The parking brake should not be used, as it can damage the tires.
Answer: A. The parking brake should be used.
When leaving your vehicle unattended, you should use the parking brake. The handbook tells drivers to use the parking brakes whenever they park. It also describes the parking brake as the device that keeps a parked vehicle from moving or rolling. That instruction is not limited to parking on a slope, so it applies when you leave the vehicle unattended. Setting the parking brake is the action the handbook supports for parking.
9. What do air brakes use to make the brakes work?
- Compressed air ✓
- Outside air
- Non-compressed air
Answer: A. Compressed air
Air brakes use compressed air to make the brakes work. The handbook states plainly that air brakes use compressed air to make the brakes work. It also describes the compressor pumping air into the storage tanks, where compressed air is held, and notes those tanks hold enough air for several brake applications even if the compressor stops. So the force that applies the brakes comes from air that has been squeezed under pressure, not from ordinary outside air.
10. If a box contains liquid containers, the box must display:
- Arrows pointing in the correct upright direction. ✓
- A return address.
- The number of containers inside the box.
- Rubber gloves.
Answer: A. Arrows pointing in the correct upright direction.
The box must display arrows pointing in the correct upright direction. The handbook passage for hazardous materials says that when a package has liquid containers inside, it will carry package orientation markings with arrows pointing in the correct upright direction. That is the marking the question asks about, so the box must display those upright arrows. The same passage is about comparing shipping papers to markings and labels, and it treats orientation arrows as part of the package marking for liquids. Nothing in the passage says a return address, a container count, or rubber gloves must be displayed on the box for this rule.
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Last checked: 2026-10-17 · Not yet verified
Updated: · Based on the official driver handbook