FREE District of Columbia CDL Practice Test 2024 - DMV Practice Test Page 2 of 7
The gross domestic product (GDP) of Washington, D.C. is $99 billion per year, despite its small size of 68 square miles. More than 2,100 times the size of the state. Without commercial drivers to transport goods and products in and out of the district, such a big GDP would be impossible to achieve — which is where you come in. This practice quiz will assist you in obtaining or renewing your commercial driver's license (CDL) by providing realistic practice for the CDL written exam. These 50 multiple-choice questions include key knowledge from the Commercial Driver License Manual in Washington, D.C., as well as federal and local laws. Right-of-way rules, braking and shifting tactics, driving in adverse weather and road conditions, handling emergency situations, and more will all be put to the test. To ensure that you can correctly answer future questions, use the suggestion supplied with each question and read the explanations attentively. Return and practice until you are confident in your understanding of the material.
8 . Sometimes, when checking the automatic transmission fluid level:
In some vehicles, you may have to leave the engine running to check the automatic transmission fluid level.
9 . Test the low pressure warning signal:
It is essential that your low pressure warning light function properly. After allowing the system to charge, you can test the warning signal by rapidly applying and releasing the brake pedal. This will release air from the braking system and the warning signal should come on when pressure drops to a dangerous level.
10 . The air storage tanks:
In an air brake system, the air storage tanks hold enough air for brakes to be used several times if the compressor stops working.
11 . When using the controlled braking method in an emergency situation, you should:
The controlled braking method for emergency stops involves applying the brakes as hard as you can without locking the wheels. Keep steering wheel movements small when braking in this way.
12 . Laws about securing loads and regulating CMV weights may vary from state to state. During interstate travel:
Commercial vehicle weight, securement of cargo, covering of loads, and where large vehicles can be driven are all regulated by federal, state, and local laws. These vary from place to place, so you must be aware of the rules that apply where you will be driving. State laws in the state in which you are driving take precedence.
13 . If something is found to be unsafe during a pre-trip inspection, you should:
If a pre-trip inspection reveals anything unsafe about your vehicle, you must get it repaired. It is illegal to operate an unsafe vehicle.
14 . If a CMV driver operates a CMV with a detectable blood alcohol concentration (BAC) that is lower than 0.04 percent, they will be:
If you are found to be operating a CMV with any detectable amount of alcohol in your system, but you are still below the legal limit of 0.04 percent, you will be placed out-of-service for 24 hours. It is both illegal and dangerous to operate a motor vehicle while under the influence of alcohol.
See the exact questions that will be on the 2024 District Of Columbia DMV exam.
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