Class 1 (Explosives). If your vehicle has a breakdown or accident while carrying explosives, warn others of the danger. Keep bystanders away. Do not allow smoking or open fire near the vehicle. If there is a fire, warn everyone of the danger of an explosion.
Remove all explosives before separating vehicles involved in a collision. Place the explosives at least 200 feet from the vehicles and occupied buildings. Stay a safe distance away.
The forward force (80% of the cargo weight) represents braking while driving straight ahead.
The rearward force (50% of the cargo weight) represents vehicle acceleration or braking in reverse.
The side-to-side or lateral force (50% of the cargo weight) represents traveling on a curve, ramp or changing lanes.
The vertical force (20% of the cargo weight)) represents cargo vibration during transport. This requirement is satisfied when the cargo is "Fully Contained"
ABS helps you avoid wheel lock-up and maintain control. You may or may not be able to stop faster with ABS, but you should be able to steer around an obstacle while braking and avoid skids caused by over braking.
Baffled liquid tanks have bulkheads in them with holes that let the liquid flow through. The baffles help to control the forward and backward liquid surge. Side-to-side surge can still occur. This can cause a rollover.
Here are some specific activities which are considered to be on-duty time:
All time spent at a plant, shipping / receiving facility, terminal, or other facility of a motor carrier, unless you are in your sleeper berth or have been relieved of all work-related responsibilities.
All driving time.
All time loading, unloading, supervising, or attending your truck; or handling paperwork for shipments.
All time spent doing any other work for a motor carrier, including giving or receiving training and driving a company car.
All time inspecting or servicing your truck, including fueling it and washing it.
All other time in a truck unless you are resting in a sleeper berth.
All time spent providing a breath, saliva, hair, or urine sample for drug / alcohol testing, including travel to and from the collection site.
All time spent doing paid work for anyone who is not a motor carrier, such as a part-time job at a local restaurant.
Wet roads can always be slippery, but one of the following conditions tends to be the most dangerous. Which one?
Right after it starts to rain, the water mixes with oil left on the road by vehicles. This makes the road very slippery. If the rain continues, it will wash the oil away.
After it has been raining for a while the roads become extra slick because the water has worked its way into the porous asphalt
After it finishes raining and the roads begin to dry, the wet patches are far more slippery because they form on blemishes in the road
The inside lanes of a four-lane highway are the slickest after the rain stops because they see less traffic
Just After Rain Begins. Right after it starts to rain, the water mixes with oil left on the road by vehicles. This makes the road very slippery. If the rain continues, it will wash the oil away.
Most people aren't aware of this phenomenon. As soon as it starts raining, that road becomes slick!
Material used to fill a void between articles of cargo and the structure of the vehicle that has sufficient strength to prevent movement of the articles of cargo.
A tapered piece of material, thick at one end and thin at the other, used to help keep cargo from moving.
A device placed between the deck of a vehicle and car or between articles of cargo, intended to provide greater friction than exists naturally between these surfaces.
A structure, device, or another substantial article placed against an article to prevent it from tipping that may also prevent it from shifting.
Material used to fill a void between articles of cargo and the structure of the vehicle that has sufficient strength to prevent movement of the articles of cargo.
When inspecting the air brakes of a combination vehicle you will pump the brake pedal continuously to reduce the air pressure in the air tanks. What should happen when the air pressure gets down between 20 - 45 psi?
Fluid should build up in the air lines if you repeatedly pump the brake
The air will begin to escape from the system once the pressure drops below 20 - 45 psi
The trailer air supply control, also called the tractor parking valve control, should pop out (or go from “normal” to “emergency” position)
The air compressor governor will shut off when the air pressure gets too low
Step on and off the brake pedal several times to reduce the air pressure in the tanks. The trailer air supply control (also called the tractor parking valve control) should pop out (or go from “normal” to “emergency” position) when the air pressure falls into the pressure range specified by the manufacturer (usually within the range of 20 to 45 psi).
Our CDL practice tests are designed to help test your knowledge of the CDL Manual and sharpen your skills for taking the CDL permit and endorsement exams. They are not designed to teach you the knowledge necessary to pass the exams. Please do not try to memorize CDL practice tests in order to get your CDL. There's a better way.
Our High Road CDL Training Program is by far the easiest and most effective way to learn the materials necessary for passing your written CDL exams and preparing for a great start to your career. We strongly suggest using the High Road (which is 100% free!) to learn the CDL manual before using our CDL practice questions to test your knowledge.
How to Pass CDL Permit Test the First Time
The Class A CDL permit exam consists of a multiple choice test covering 20 different areas related to commercial driving. To prepare for this test, it is important to do practice tests beforehand. Knowing your personal study habits, getting enough rest, and eating a healthy breakfast will also set you up for success.
Tips For Passing the Commercial Driver's License (CDL) Permit Test
Practice Makes Perfect: The best way to both mentally and physically prepare for the written exam is to take practice tests. Start out with open-book tests and gradually work your way up to giving yourself a time limit. Finally, before the big day, take a practice exam as if it were the real thing without any help. This will give you a good indication of how well you understand the material.
Understand Instead of Memorize: Memorizing information can be helpful for the written exam, but the key to being fully prepared is to understand the material rather than just memorizing it. Understanding the material will allow you to answer questions correctly no matter how they are worded.
Real World Applications: When struggling to understand concepts, create real-world scenarios to make the information more relevant to your life. Doing this will make it easier to remember come test time.
Utilize Study Strategies: Utilizing study strategies such as flashcards, songs, rhymes, and phrases can help you remember the material.
Be Fresh and Alert: The night before the exam, get a good night's sleep and eat a filling breakfast on the morning of the exam. This will ensure you are fresh and alert to take your exam.
Begin Early and Space out Your Studying: It is important to give yourself ample time before the exam to get familiar with the material and get your mind ready for the big day. Consider taking a training course online or in-person, if it's required. Shop around for a course that works best for you.
By following these tips, you will be well prepared for your written CDL exam and on your way to a successful career.