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Oklahoma CDL DMV Knowledge Test Class A 1

Take 6 practice tests for CDL is the best way to prepare for your Oklahoma DMV exam is by taking our free practice tests. The following question are from real Oklahoma DMV practice test. More than 95% people pass a DMV exam when practice at DMV Practice Test.

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1. If an aggressive driver is involved in a crash down the road, you should:
Pull over and yell at them.
Stop after the crash scene and report the other driver’s behavior to police.
Block the driver in with your vehicle.

If you observe a crash involving an aggressive driver, you should stop a safe distance from the crash scene, wait for police to arrive, and inform them of the aggressive behavior you witnessed.

2. When pulled off on the side of the road:
A driver should keep the driver’s side door open.
A driver should turn on the emergency flashers.
The driver should wave their arms.

If you must stop on the side of the road, make sure to use your four-way emergency flashers. This is particularly important at night.

3. ____ is an example of required emergency equipment.
A spare electrical fuse
A loud horn
A battery-operated flashlight

All commercial motor vehicles are required to be equipped with the proper emergency equipment. This may include spare electrical fuses; three red reflective triangles, six fuses, or three liquid burning flares; and at least one properly charged and rated fire extinguisher.

4. A poor balance of weight in a trailer:
Can make handling unsafe.
Improves traction.
Increases fuel efficiency.

Poorly balanced weight in a trailer can make handling unsafe. For example, either too little or too much weight on the front axle can make a vehicle difficult to steer. Weight should be distributed evenly from front to back and from side to side. It should be distributed as low as possible.

5. A vehicle that is smaller than your vehicle:
Will usually be able to stop faster than your vehicle.
Will usually take more time to stop than your vehicle.
Will take about the same amount of time to stop as your vehicle.

In general, a smaller vehicle will be able to come to a complete stop faster than a larger vehicle. Keep this in mind when determining your following distance.

6. When starting an engine as part of a pre-trip inspection, the driver should:
Listen for unusual noises.
Place the engine in first gear.
Turn on the heater.

Check your engine during the pre-trip inspection. After starting the engine, you should listen for unusual noises.

7. What is often found in compressed air?
Brake fluid

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. Tanks must be drained regularly to remove this build-up.

8. When driving, you should stop every ____ to take a break to avoid becoming too tired.
Half hour
Two hours
Six hours

To reduce the risk of becoming fatigued on a long trip, you should stop to take a break at least once for every two hours or 100 miles driven.

9. You may be an aggressive driver if you:
Expect delays on your drive.
Slow down and maintain a reasonable following distance.
Make hand gestures that could anger other drivers.

Avoid being an aggressive driver by being realistic about your travel time, making allowance for delays, maintaining reasonable following distances, and not making hand gestures that could anger another driver.

10. Parked delivery trucks may be hazardous because:
The trucks are often shiny.
People are often in a hurry when exiting such trucks and may not look for other vehicles.
Packages often fall out of the trucks and into the road.

Passing parked delivery or postal trucks can be dangerous because the driver may be in a hurry and pull into traffic without warning, or may they suddenly step out of the vehicle without checking for other traffic.

11. Applicants seeking a hazardous materials endorsement must pass a threat assessment through which agency?

Applicants seeking a hazardous materials endorsement must undergo a threat assessment conducted by the Transportation Security Administration (TSA).

12. When drivers turn, they usually:
Look in the direction of the turn.
Look in the direction opposite the turn.
Look behind their vehicles.

When turning, drivers usually look in the direction of their turn. If a driver fails to signal before a turn or lane change, their body movements may still provide a clue that they are planning to turn.

13. To determine if a vehicle can handle a load, you must know:
The vehicle’s suspension rating.
The tire rating for the front tires only.
The tire rating for the rear tires only.

It is a driver's responsibility to make sure their vehicle is not overloaded. They must be aware of legal weight limits and the maximum weight that their vehicle is rated to carry, including the weight capacity rating of the suspension system.

14. When backing with a trailer, you should begin by:
Turning the steering wheel in the direction of the turn.
Turning the steering wheel in the direction opposite of the turn.
Turning the wheel as sharply as possible.

When backing with a trailer, begin by turning the steering wheel in the direction opposite of the turn. Once the trailer starts to turn, reverse the direction of the steering wheel to follow the trailer.

15. The rods in S-cam brakes move the slack adjusters when air pressure is added to the brake chambers. This air pressure is added to the chambers when the driver:
Presses the brake pedal.
Uses the emergency brake.
Uses the trailer hand valve.

When pressing the brake pedal in a vehicle with S-cam brakes, air will enter the brake chambers. The added air pressure will push out the rods and move slack adjusters, twisting the brake camshafts.

16. As part of a pre-trip inspection, you should look for all of the following, except:
Tires with too much air pressure.
Tires with too much wear.
Tires made by different manufacturers.

When inspecting your tires, verify that there is tread depth of at least 4/32 of an inch in every major groove on the front tires and tread depth of at least 2/32 of an inch in grooves on the other tires. Be sure that your tires are not too worn, are not cracked, have proper air pressure, and are all equally sized.

17. When leaving a vehicle unattended, a driver should:
Always set the parking brake.
Only set the parking brake if the vehicle is parked on a slope.
Deflate the tires by 10 percent.

Always apply the parking brake when leaving your vehicle unattended.

18. Who is responsible for ensuring cargo is loaded properly?
The driver
The shipper
The recipient

A driver is responsible for four things related to transporting cargo. They are responsible for inspecting the cargo, recognizing overloads and poorly balanced weight, ensuring that the cargo is secured without obstructing their view, and ensuring that the cargo is not obstructing access to emergency equipment.

19. How can you check hydraulic brakes?
Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should not move.
Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should move slowly toward the floor.
Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should slowly rise.

Check hydraulic brakes by pumping the brake pedal three times before applying firm pressure to the pedal for five seconds. The pedal should not move. If it does, there may be a leak or some other problem in the braking system.

20. A safety valve is set to open at ____ pounds per square inch (psi).

The safety valve protects air tanks and the rest of an air brake system from accumulating too much air pressure. The safety valve is usually set to open at 150 psi.

21. Why should you regularly drain the air tanks?
Because the air gets old and needs to be replaced
Because compressed air contains some water and the water collects in the tanks
To allow for a change in pressure

Compressed air usually contains a certain amount of moisture and compressor oil, which can build up in the air storage tanks and damage the brake system. The tanks should be drained to clean out these accumulations. On a tank with a manual drain valve, draining should be performed at the end of each day of driving.

22. When checking your tires as part of the pre-trip inspection, you should look at the:
Tire pressure.
Tire color.
Tire manufacturer.

When checking your tires as part of a pre-trip inspection, it is important to verify that the tire pressure is neither too low nor too high.

23. If you’re not sure what to do to extinguish a fire in your vehicle, you should:
Use water.
Stay inside the vehicle.
Wait for the firefighters.

If you are not sure which kind of extinguisher should be used on a fire in your vehicle, particularly a hazardous materials fire, you should wait for the firefighters to arrive and allow them to extinguish it.

24. In a vehicle with dual parking control valves, a separate air tank can be used:
To make the air brakes work more effectively.
To temporarily release the spring brakes.
To charge the brakes on the rear trailer.

In a vehicle with dual parking control valves, there is a separate air tank that can be used to temporarily release the spring brakes if they have been activated due to low air pressure. Pushing in the proper control will release the spring brakes for a short period of time, allowing the driver to move the vehicle in an emergency.

25. When conducting a pre-drive inspection:
The inspection report is not important.
The inspection report must only be reviewed if there will be passengers in the vehicle.
The previous inspection report should be reviewed, if applicable.

The first step of a vehicle inspection is to review the last vehicle inspection report. Only sign the report if noted defects are certified to have been repaired.

26. Roads are especially slippery right after it begins to rain because:
The water mixes with oil and grease on the road.
Tires are not made to drive in wet weather.
The water yet hasn't absorbed the dirt and grease.

Roads are often especially slippery when it first begins to rain. Rainwater forms a slick film when mixed with oil and grease on the road surface that has not yet washed away.

27. When traveling down a steep downgrade:
The air brakes should be used.
The vehicle should be placed in a low gear and the driver should use engine braking.
The driver should continually downshift instead of using the brakes.

On long and/or steep downgrades, you should primarily use engine braking to control the speed of your vehicle. Use your brakes only as a supplement to this effect.

28. In very hot weather, tires should be checked regularly because:
They may melt.
Air pressure may increase with the temperature.
The tread wears down more quickly than in cooler weather.

Because air pressure increases with temperature, you should pay special attention to the tire mounting and pressure when traveling in hot weather.

29. A truck should be parked:
So that it must be backed up to leave the space.
So that it can be pulled forward to leave the space.
On the grass.

Because you can't see everything behind you, backing is always dangerous and should be avoided whenever possible. Choose parking spaces from which you can pull forward when you leave.

30. When driving, it is important to:
Avoid using your mirrors while in heavy traffic.
Look only to the front and right side of the vehicle.
Look to the front, sides, and rear of the vehicle.

It is essential that you are aware of what is happening on all sides of your vehicle at all times. Scan the road ahead and make regular checks of the mirrors on both sides of your vehicle while you are driving.

31. Brakes out of adjustment will:
Work properly.
Cause some of the brakes to overwork and malfunction.
Allow better acceleration.

Brakes out of adjustment will fade before those that are properly adjusted. Brake adjustment must be checked frequently to help prevent brake issues.

32. Escape ramps are ramps that can be used:
Only by automobiles, not trucks.
To leave the highway and enter a two-lane highway.
To stop runaway vehicles on steep downhills.

Escape ramps are constructed in areas with steep downgrades to allow a means of safely stopping runaway vehicles. They consist of a long bed of loose, soft material, and sometimes an uphill slope.

33. Bridges usually:
Do not freeze.
Have heaters to prevent them from freezing.
Freeze before other surfaces.

Bridges tend to freeze before other parts of the road surface. You should be especially careful on bridges when temperatures are near the freezing point.

34. When traveling at speeds under 40 mph, you should maintain at least ____ of following distance for every 10 feet of your vehicle's length.
One second
Two seconds
Three seconds

When traveling at speeds under 40 mph, you should allow a minimum of one second of following distance for every 10 feet of your vehicle's length. At faster speeds, add at least one additional second.

35. When transporting a load, the cargo should be inspected:
Only at the beginning of a drive.
Only after driving a long distance.
After every break.

Cargo and its securing devices must be inspected before starting a trip. After beginning a trip, the driver should check the load and securing devices within the first 50 miles on the road, every three hours or 150 miles traveled, and after every break.

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