General Driving Knowledge — Illinois
Illinois 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. General Driving Knowledge: 132 questions.
Questions that do not fit a single topic: lane use, turning, signalling and other rules of the road.
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 | General Driving Knowledge |
| License test | Illinois CDL permit (CLP) knowledge tests |
| Topic questions | 132 (30% 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
Advertisement
Questions (132)
1. When backing, a helper:
- Should be used whenever possible. ✓
- Often adds to the confusion of backing.
- Should only be used if the driver is not feeling confident.
- Would likely get in the way.
Answer: A. Should be used whenever possible.
When backing, a helper should be used whenever possible. The handbook lists using a helper as one of its simple backing safety rules and repeats that you should use a helper when you can. It explains there are blind spots you cannot see, so a helper is important. The helper should stand near the back where you can see them, and you should agree on hand signals, including a stop signal, before you start. That support makes using a helper whenever possible the choice that fits the handbook.
2. After a vehicle is started, warning lights and buzzers:
- Should stay on for several minutes.
- Should turn off within a few seconds. ✓
- Should stay on until manually turned off.
- Should remain on.
Answer: B. Should turn off within a few seconds.
They should turn off within a few seconds. The handbook says warning lights and buzzers for oil, coolant, charging circuit, and antilock brakes should go out right away after the engine is started. That means they are not expected to stay on during normal operation. The same passage notes that if an ABS light stays on, the ABS is not working properly, so a warning that remains lit points to a problem rather than normal warm-up.
3. After an accident, flares should be used with caution because:
- There may be spilled fuel on the ground that could ignite. ✓
- Other drivers may not see the flares.
- Flares are expensive.
- Other drivers may get confused about what is happening.
Answer: A. There may be spilled fuel on the ground that could ignite.
Flares should be used with caution after an accident because spilled fuel on the ground could ignite. The handbook lists spilled fuel and improper use of flares among causes of vehicle fires after accidents. That tells you the concern is not just being seen; it is starting a fire. A flare burns, so using it carelessly around fuel that may have leaked onto the road can set that fuel alight. The Texas special-requirements passage also says vehicles carrying flammable liquids or compressed flammable gases must not use flares or any signal produced by flame. That supports treating flares as something to handle carefully around possible spilled fuel.
4. Water on bridges:
- Usually freezes before water on other parts of a roadway. ✓
- Usually freezes after water on other parts of a roadway.
- Will not freeze.
- Is not a concern in cool weather.
Answer: A. Usually freezes before water on other parts of a roadway.
Water on bridges usually freezes before water on other parts of a roadway, so bridges turn icy sooner than the road around them. The driving-safely section lists bridges among the signs of a slippery road. It says that when the temperature drops, bridges will freeze before the road will, and it warns you to be extra careful when the temperature is near 32 degrees Fahrenheit. Because the bridge surface ices up earlier than the rest of the roadway, water sitting on a bridge turns to ice before water on the road does, which is why that choice fits what the handbook teaches.
5. What is off-tracking?
- When a vehicle’s front wheels follow a different path than its rear wheels ✓
- When a vehicle's wheels all follow the exact same path
- When a load shifts during a turn
- When a vehicle's wheels run over a curb during a turn
Answer: A. When a vehicle’s front wheels follow a different path than its rear wheels
Off-tracking is when a vehicle's front wheels follow a different path than its rear wheels. The handbook explains that as a vehicle turns a corner, its rear wheels track a different path from the front wheels, and that difference is named off-tracking. It also says longer vehicles off-track more, and a trailer's rear wheels can off-track even more than the powered unit's rear wheels. That matches the definition in the correct choice: front and rear wheels taking different paths.
6. When you must travel down a grade, when should you switch into a lower gear?
- Before beginning the grade ✓
- After you have already started the grade
- As far down the grade as possible
- At the bottom of the grade
Answer: A. Before beginning the grade
You should switch into a lower gear before beginning the grade. The handbook says to shift the transmission to a low gear before starting down the grade. It warns that if you wait until your speed has built up, you may not be able to shift into a lower gear, and you could lose engine braking effect. Engine braking is the main way to control speed on a downgrade, so choosing the low gear early keeps it available.
7. Drivers should try to stop ____ away from students at a bus stop.
- About 100 feet
- At least 50 feet
- At least 10 feet ✓
- Less than 10 feet
Answer: C. At least 10 feet
Stop at least 10 feet away from students at a bus stop. The Texas CDL handbook says to bring the bus to a full stop with the front bumper at least 10 feet from students at the designated stop. It explains that this gap makes students walk to the bus, which gives you a better view of their movements. So the distance to aim for is at least 10 feet, not a closer stop.
8. What is Gross Vehicle Weight (GVW)?
- The total weight of a vehicle and its cargo ✓
- The total weight of a vehicle before cargo
- The total weight of cargo
- The maximum weight allowed to be transported by a vehicle
Answer: A. The total weight of a vehicle and its cargo
9. Bus accidents occur most frequently:
- On expressways.
- In residential areas.
- During the summer.
- At intersections. ✓
Answer: D. At intersections.
Bus accidents occur most frequently at intersections. The passenger-transport section has a common-accidents passage that says bus accidents often happen at intersections. It also tells drivers to be careful there even when signals or stop signs control other traffic. Since the handbook names intersections as the common bus accident location, the intersection choice matches the handbook.
10. In Illinois, what is the weight limit for a five-axle combination vehicle?
- 20,000 pounds
- 30,000 pounds
- 50,000 pounds
- 80,000 pounds ✓
Answer: D. 80,000 pounds
The weight limit for a five-axle combination vehicle is 80,000 pounds. The handbook sets one ceiling on weight: the most any vehicle or combination of vehicles may weigh, including the load, is 80,000 pounds. It adds that load limits depend on the size of the vehicle and on the number and spacing of its axles. The material does not give a separate, lower figure for a five-axle combination, so the number that matches that overall maximum is 80,000 pounds.
Advertisement
Source
Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook