Knowledge Test Class A #1
Class A Driving Test | Oklahoma 2025 #1 Page 5 of 7
Train for FREE online with our Oklahoma class A license test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a OK CDL class A permit in 2025, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that CDL class A requirements may vary from state to state.
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29 . When a vehicle is started, the coolant temperature should:
After an engine is started, the coolant temperature should rise gradually to a normal operating range.
30 . Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to indicate when the ABS is not working.
Vehicles with ABS have yellow malfunction lamps to alert drivers when the braking systems are not working. Be sure you know where the malfunction lamp on your vehicle is before beginning a trip.
31 . You must have an air brake endorsement:
You must take an air brakes knowledge test to become licensed to operate a vehicle that is equipped with air brakes, including an air over hydraulic braking system.
32 . Livestock:
Because live animals can lean during curves, and otherwise move in transit, the weight distribution of a cargo of livestock is unstable. Driving with livestock requires special care.
33 . If a load is 10 feet long, it must be secured by a minimum of ____ tie-downs.
On flatbed trailers and trailers without sides, cargo must be tied down. There should be at least one tie-down for every 10 feet of cargo. Regardless of the size of the cargo, at least two tie-downs must be used.
34 . What helps prevent wheel lockup when braking?
The purpose of an Anti-Lock Braking System (ABS) is to prevent wheel lockup while brakes are being applied.
35 . When driving down a steep hill, your primary source of braking should be:
On a steep downgrade, you must use the engine's braking effect as your primary method of speed control. Be sure to decelerate and downshift appropriately before beginning to drive down the hill. Relying too heavily on the brakes may cause them to overheat and fade, becoming less effective.
2025 Oklahoma | Frequently Asked Questions
To secure a CDL Doubles/Triples endorsement in Oklahoma, you must already possess a Commercial Driver's License (CDL). You must then pass the Doubles/Triples Knowledge Test at your local Department of Public Safety. Studying the Oklahoma CDL manual will help you prepare. After passing, the endorsement will be added to your CDL.
To obtain a CDL Doubles/Triples license, you first need a Commercial Driver's License (CDL). You must then pass the Doubles/Triples Knowledge Test. Preparation for this test often involves studying the state's CDL manual, which covers required knowledge like coupling and uncoupling, inspecting doubles and triples, and pulling double/triple trailers. After passing the test, the endorsement is added to your CDL.
While Oklahoma does not mandate specific training for a CDL Doubles/Triples endorsement, it's important to thoroughly understand the material in the state's CDL manual. This includes knowledge of coupling and uncoupling, inspecting doubles and triples, and pulling double/triple trailers. Some drivers opt for professional training courses to help prepare for the Doubles/Triples Knowledge Test.
Yes, to obtain a CDL Doubles/Triples endorsement in Oklahoma, you must pass the Doubles/Triples Knowledge Test. This written exam covers specific knowledge related to operating vehicles with double or triple trailers. The information tested includes coupling and uncoupling, inspecting doubles and triples, and pulling double/triple trailers.
The CDL Doubles/Triples endorsement in Oklahoma doesn't require a specific skills test or road test. However, you need to pass a written knowledge test that covers information specific to driving double and triple trailers. This includes understanding how to couple and uncouple correctly, inspecting doubles and triples, and managing the vehicle on the road.
No, it is not permissible to operate double or triple trailers without a valid CDL Doubles/Triples endorsement in Oklahoma. This endorsement is required by law to ensure that drivers have the necessary skills and knowledge to safely operate multiple trailers. Violating this requirement can result in penalties and legal consequences.
Yes, you can add the CDL Doubles/Triples endorsement to your current commercial driver's license. You don't need to initiate a new application for a CDL. However, you will have to pass the Doubles/Triples Knowledge Test and pay the required endorsement fee to add it to your existing CDL.
Yes, there are certain limitations for drivers with a CDL Doubles/Triples endorsement. They are only allowed to drive vehicles that are specifically designed to pull two or three trailers. The driver cannot exceed the maximum weight limit for the combination vehicle, and must comply with all federal and state regulations regarding hours of service and vehicle inspections.
In Oklahoma, double trailers can be up to 28.5 feet each, and the total weight (including the vehicle) can't exceed 80,000 pounds. For triple trailers, the overall length cannot exceed 105 feet. However, weight restrictions can vary based on the specific configuration and types of roads traveled. It's best to check with local authorities for specific limits.
Yes, drivers with a CDL Doubles/Triples endorsement must follow specific safety guidelines. These include checking the coupling devices and cargo security regularly, maintaining a safe following distance, and understanding the high rollover risk. Drivers must also take wide turns to avoid trailer swing, and avoid sudden lane changes or hard braking to prevent jackknifing.