General Driving Knowledge — Oklahoma
Oklahoma CDL practice test: 421 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: 146 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 | Oklahoma CDL permit (CLP) knowledge tests |
| Topic questions | 146 (35% of 421 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
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Questions (146)
1. If a package of explosives has an oily stain or shows dampness, the driver should:
- Continue to transport the load.
- Decline transporting the load. ✓
- Use towels to absorb the liquid.
Answer: B. Decline transporting the load.
Decline transporting the load: do not take a package of explosives that shows dampness or an oily stain. The handbook says never to transport damaged packages of explosives, and it adds a specific rule: do not take a package that shows any dampness or oily stain. The condition named in the question is enough by itself to refuse the package. The driver should not load it and continue the trip.
2. When driving a vehicle with empty cargo tanks that are used to transport hazardous materials, a driver:
- Should not cross a railroad crossing.
- Needs to slow when approaching a railroad crossing, but is not required to stop.
- Must stop at a railroad crossing. ✓
Answer: C. Must stop at a railroad crossing.
You must stop at a railroad crossing when driving a vehicle with empty cargo tanks used to transport hazardous materials. The handbook says to stop before a railroad crossing if your vehicle has cargo tanks, whether loaded or empty, that are used for hazardous materials. It also lists placarded vehicles and vehicles carrying chlorine. The passage says to stop 15 to 50 feet before the nearest rail, then go only when you are sure no train is coming and you can clear the tracks without stopping. Empty tanks do not remove the stop requirement.
3. When a vehicle is started, the coolant temperature should:
- Decrease.
- Rise slowly. ✓
- Hold steady.
Answer: B. Rise slowly.
When a vehicle is started, the coolant temperature should rise slowly toward its normal operating range. The handbook lists coolant temperature among the gauges to check after the engine starts. It says the reading should begin a gradual rise to the normal operating range. That makes a slow climb the expected startup behavior. A drop or a flat reading is not what the handbook describes for this check. This is the gauge check at startup, not the hot-weather driving check.
4. A bridge formula:
- Permits less weight per axle for axles that are close together. ✓
- Permits more weight for trucks.
- Is not a concern for drivers.
Answer: A. Permits less weight per axle for axles that are close together.
A bridge formula permits less weight per axle when the axles are close together. The handbook explains that maximum axle weights are often set by a bridge formula, and that formula allows less maximum axle weight for axles that sit closer together. The stated purpose is to prevent overloading bridges and roadways. So the formula is a limit that tightens as axles get closer, not a permission slip for heavier loads.
5. Combination vehicles:
- Are usually shorter than single commercial vehicles.
- Usually require less skill to drive than single commercial vehicles.
- Usually require more skill to drive than single commercial vehicles. ✓
Answer: C. Usually require more skill to drive than single commercial vehicles.
6. To complete a Uniform Hazardous Waste Manifest, you must:
- Sign the manifest by hand. ✓
- Only sign the manifest if you cross into another state.
- Have a witness sign the manifest.
Answer: A. Sign the manifest by hand.
You must sign the Uniform Hazardous Waste Manifest by hand. The handbook's hazardous waste manifest section says you have to sign by hand and carry the manifest when you haul hazardous waste. The same passage repeats the handwritten signature requirement for shippers and for each carrier transporting the shipment, so signing by hand is part of the rule at every stage, not just for one party. Nothing in the passage ties signing to crossing a state line or to having someone else watch you sign. So the plain reading of the passage points to signing the manifest yourself, by hand.
7. While driving:
- Creating a text is not permitted, but reading a text is.
- Creating a text is permitted, but reading a text is not.
- Neither creating nor reading a text is permitted. ✓
Answer: C. Neither creating nor reading a text is permitted.
Neither creating nor reading a text is permitted while driving. The handbook defines texting as manually entering text into, or reading text from, an electronic device. It also directly says not to type or read a text message on a mobile device while driving. The federal rule quoted in the handbook prohibits texting by commercial motor vehicle drivers. Since both writing and reading are covered by that definition and prohibition, the choice that rules out both activities is the one that matches the handbook.
8. Rearward amplification refers to:
- The amount of noise projected to the rear of the vehicle.
- The cause of the "crack-the-whip" effect. ✓
- The number of trailers that can be pulled by one tractor.
Answer: B. The cause of the "crack-the-whip" effect.
Rearward amplification is the cause of the "crack-the-whip" effect. The handbook states plainly that rearward amplification causes the crack-the-whip effect. It explains this with a chart of combination vehicles in a quick lane change: the higher the rearward amplification number, the more likely the rear trailer is to roll over compared with the tractor. Triples, for example, are listed at 3.5. That is why the manual tells you to steer gently and smoothly, since a sudden steering move can tip a trailer over. So rearward amplification is the underlying cause, not a sound level or a trailer count.
9. If a driver has stopped on the road and is placing triangles to warn other motorists:
- The triangles should be held between the driver and oncoming traffic. ✓
- The triangles should be carried behind the driver's back to prevent them from being seen by other drivers until they are placed.
- The triangles should be held as low as possible.
Answer: A. The triangles should be held between the driver and oncoming traffic.
Hold the triangles between yourself and oncoming traffic while you set them out. The handbook's figure caption on placing warning triangles says to keep them between you and the traffic coming toward you, so other drivers can see you. The point is your own safety: the triangle sits in the line of sight of approaching traffic while you are out on the road, and drivers can spot you as well as the warning device. That is exactly what the bank answer describes.
10. Drivers talking to passengers in their vehicle should be viewed as:
- Responsible drivers.
- Distracted drivers. ✓
- Knowledgeable drivers.
Answer: B. Distracted drivers.
Drivers talking to passengers should be viewed as distracted drivers. The handbook lists talking to passengers as an activity inside the vehicle that can distract your attention, along with things like adjusting controls, eating, and using a phone. It says distracted driving can cause collisions, injury, death, or property damage. Another section tells you to watch for other drivers who appear to be in conversations with passengers as a sign of distraction. So a driver chatting with passengers is treated as a distracted driver, not automatically as responsible or knowledgeable.
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Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook