Vehicle Equipment & Safe Operation — Georgia
Georgia CDL practice test: 399 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: 177 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 | Georgia CDL permit (CLP) knowledge tests |
| Topic questions | 177 (44% of 399 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 (177)
1. When you press the brake pedal in a vehicle with S-cam brakes, air pressure pushes out the rod and moves the:
- Slack adjuster. ✓
- Axle.
- Brake drum.
- Alcohol evaporator.
Answer: A. Slack adjuster.
When you press the brake pedal in an S-cam brake system, air pressure pushes the rod out and moves the slack adjuster. The handbook describes the s-cam sequence at the wheel. Pushing the pedal lets air into the brake chamber. That air pressure pushes the push rod outward. The rod is connected to the slack adjuster, so the adjuster moves; it then twists the brake camshaft and turns the s-cam. The s-cam spreads the brake shoes against the drum. The slack adjuster is the part moved by the rod in this chain, which is why it is the correct choice.
2. Blocking a load:
- Is dangerous and should never be done.
- Helps stabilize the load. ✓
- Is only done with liquids.
- Can only be done in dry weather.
Answer: B. Helps stabilize the load.
3. All air tanks must include:
- A drain valve. ✓
- A lock.
- A trap door.
- A warning sticker.
Answer: A. A drain valve.
All air tanks must include a drain valve. The handbook explains that water and compressor oil collect at the bottom of an air tank, and that this can harm the air brake system; water can freeze in cold weather and cause brake failure. It states that each air tank has a drain valve at the bottom so the tank can be drained. Unless the system has automatic drain valves, you must drain the tanks yourself at the end of each driving day. That makes the drain valve the required item, not a lock, trap door, or warning sticker.
4. During a static leakage test, the maximum leakage rate for a single vehicle with air brakes is ____ in one minute.
- 1 psi
- 2 psi ✓
- 3 psi
- 4 psi
Answer: B. 2 psi
5. The maximum amount of play that is safe on a 20-inch steering wheel is:
- One-quarter of an inch.
- Two inches. ✓
- 10 inches.
Answer: B. Two inches.
The most steering wheel play that is still safe on a 20-inch wheel is about two inches of movement at the rim. The handbook lists steering system defects to check before a trip, and one of them is steering wheel play of more than 10 degrees. That 10 degrees works out to roughly 2 inches of movement measured at the rim of a 20-inch wheel. The handbook says play beyond that point can make the vehicle hard to steer. So on a wheel that size, two inches is the limit the handbook describes, and anything past it is a defect you should catch in your inspection.
6. If the brake pads rub against the brake drums and create too much heat:
- The brakes will stick.
- The brakes will become extra sensitive.
- The brakes may stop working. ✓
- The air compressor will kick on to cool the brakes.
Answer: C. The brakes may stop working.
Too much heat from the brake pads or shoes rubbing against the drums can make the brakes stop working. The handbook says braking creates heat and brakes can take a lot, but too much heat can make them stop working. It explains that excessive heat reduces friction in the brake lining and expands the drums, so the shoes must move farther and press with less force. Continued overuse can increase brake fade until the vehicle cannot be slowed or stopped. That supports the idea that overheated brakes may stop working.
7. If a truck's Anti-Lock Braking System (ABS) is not working:
- The truck will not have any brakes.
- The truck should be driven only at slow speeds.
- The truck will still have brakes. ✓
- The truck will lack brakes on its left side.
Answer: C. The truck will still have brakes.
If the ABS is not working, the truck will still have brakes. The handbook says ABS is an addition to your normal brakes and does not change your normal braking capability. If ABS is not working, you still have normal brake functions, so you drive and brake as you always have. The yellow warning lamp means you may have lost ABS control at one or more wheels, not that the brakes are gone. That is why the truck still has brakes.
8. When uncoupling a triple trailer rig:
- The second trailer should be uncoupled first.
- The third trailer should be uncoupled first. ✓
- The order of uncoupling is not important.
- The heaviest trailer should be uncoupled first.
Answer: B. The third trailer should be uncoupled first.
The third trailer should be uncoupled first. The handbook's triple-trailer procedure starts with the air and electric lines to the trailer, then has you remove the third trailer and its dolly before handling the rest of the rig the way you would a double-bottom. That listed sequence supports taking the rear trailer first. The handbook also says wrong coupling or uncoupling can be very dangerous, so following the stated order matters.
9. When trying to control a minor truck fire, what should you do before opening the trailer doors?
- Check to see if the doors are hot. ✓
- Throw water on the doors.
- Put on a pair of gloves.
- Wait 30 minutes.
Answer: A. Check to see if the doors are hot.
Before opening trailer doors to control a minor truck fire, check whether the doors are hot. The handbook says to feel the trailer doors before you open them. If they are hot, that points to a cargo fire, and you should leave the doors closed. Opening them lets air in and can make the fire flare up; without air, many fires smolder until firefighters arrive and do less damage. The same fire section also says to call for help and use an extinguisher only to keep minor truck fires from spreading to cargo before firefighters get there.
10. The application pressure gauge:
- Shows how much air pressure is being applied to the brakes. ✓
- Shows the temperature of air being used in the braking system.
- Shows the pressure of the air coming from the compressor.
- Shows the number of times the brakes have been used.
Answer: A. Shows how much air pressure is being applied to the brakes.
The application pressure gauge shows how much air pressure you are applying to the brakes. The handbook says the application pressure gauge shows how much air pressure you are applying to the brakes. It notes this gauge is not on every vehicle. It also says that if you need more application pressure to hold the same speed, the brakes may be fading, and increased pressure can point to brakes out of adjustment, air leaks, or mechanical problems. That matches the choice about applied brake pressure.
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Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook