CDL Practice Tests: Dominate The CDL Exam!
Choose A Section:
Go!Why do hazardous materials regulations exist?
- Contain the Material
- All these are true
- Ensure Safe Drivers and Equipment
- Communicate the Risk
Some school buses are equipped with roof-mounted, white strobe lights. If your bus is so equipped, the overhead strobe light should be used when:
- You are waiting for children to cross the street
- You have a problem with your ABS system
- You are in a construction zone or crossing railroad tracks
- You have limited visibility
You receive a scale ticket and your drive axles are 35,700 and your trailer tandems are 30,600. Based upon a trailer with 4 inch slider rail hole spacings, what is the minimum number of holes you would have to slide the tandems to get the weight legal, and what would the final weights be?
- Slide tandems back 7 holes - 33,750 drive axles - 32,550 trailer tandems
- Slide tandems back 6 holes - 33,950 drive axles - 32,350 trailer tandems
- Slide tandems forward 7 holes - 33,950 drive axles - 32,350 trailer tandems
- Slide tandems forward 6 holes - 33,750 drive axles - 32,550 trailer tandems
With 4 inch spacing you're moving 250 pounds per hole so you need to move 7 holes to shift a minimum of 1,700 pounds (250 x 7 = 1,750).
If you operate a CMV, you:
- Will require alcohol testing at least once every 7 days
- May refuse alcohol testing without probable cause
- Have given your consent to alcohol testing
- Can not be subject to alcohol testing when off-duty
Blocking is used to:
- Provide greater friction between an article and the vehicle.
- Attach a tiedown to.
- Place against or around an article to prevent horizontal movement of the article.
- Prevent forward movement of cargo.
Blocking:
A structure, device, or another substantial article placed against or around an article to prevent horizontal movement of the article.
If you work for an interstate bus carrier:
- You must inspect your bus at the end of each shift. You must complete a written inspection report for each bus driven. The report must specify each bus and list any defects that would affect safety or result in a breakdown. If there are no defects, the report should say so.
- You must require passengers to show ID before crossing any state lines.
- All of these are true
- You must fill out a mid-trip inspection report every 100 miles or two hours, whichever comes first. You must turn these in to the shop supervisor at the end of each day.
Why must CDL holders carry a tanker endorsement for hauling liquids in bulk tanks?
- Thick or flammable liquids are difficult to get out of the tank
- Tankers are often far heavier than any other commercial vehicles on the road
- Liquids in bulk cause driving control problems because the cargo is heavy, prone to shifting, and has a high center of gravity
- You can damage a tanker far easier than other types of trailers
Air Leakage Rate Test: With the air pressure built up to governor cut-off (120-140 psi), shut off the engine, chock your wheels (if necessary), release the parking brake (all vehicles) and the tractor parking valve (combination vehicle), and fully apply the foot brake. Hold the foot brake for one minute. The loss rate should be:
- less than 10 psi in one minute for single vehicles and less than 15 psi in one minute for combination vehicles.
- None of these are correct
- less than 2 psi in one minute for single vehicles and less than 3 psi in one minute for combination vehicles.
- less than 3 psi in one minute for single vehicles and less than 4 psi in one minute for combination vehicles.
Test Air Leakage Rate. With the air pressure built up to governor cut-off (120-140 psi), shut off the engine, chock your wheels (if necessary), release the parking brake (all vehicles) and the tractor parking valve (combination vehicle), and fully apply the foot brake. Hold the foot brake for one minute. Check the air gauge to see if the air pressure drops more than 3 pounds in one minute (single vehicle) or 4 pounds in one minute (combination vehicle).
There are two tests for air leakage. One test uses the foot brake, the other does not.
Remember these numbers:
1) Testing without using the foot brake, the pressure can only drop 2 psi for single vehicles, 3 psi for combination vehicles.
2) Testing with the foot brake, the pressure can only drop 3 psi for single vehicles, 4 psi for combination vehicles
Which statement is correct about the S-cam function in an air brake system?
- The S-cam forces the brake drums away from one another and presses the liners against the inside of the brake chamber. When you release the brake pedal, the V-cam rotates back and a spring pulls the brake shoes away from the drum, letting the wheels roll freely again.
- None of these are correct
- The S-cam forces the brake shoes away from one another and presses them against the inside of the brake drum. When you release the brake pedal, the S-cam rotates back and a spring pulls the brake shoes away from the drum, letting the wheels roll freely again.
- The S-cam forces the brake linings away from the hub and presses them against the outside of the brake drum. When you release the brake pedal, the S-cam rotates back and a knob pulls the brake shoes away from the drum, locking up the wheels
S-cam Brakes. When you push the brake pedal, air is let into each brake chamber. Air pressure pushes the rod out, moving the slack adjuster, thus twisting the brake camshaft. This turns the S-cam (so-called because it is shaped like the letter “S”). The S-cam forces the brake shoes away from one another and presses them against the inside of the brake drum. When you release the brake pedal, the S-cam rotates back, and a spring pulls the brake shoes away from the drum, letting the wheels roll freely again.
You're loaded heavy with 1/2 tank of fuel onboard. Using the following numbers, where should you move the 5th wheel to get it setup properly?
drive axles: 34,700 pounds
Weight transfer: 500 pounds per hole
- Move the 5th wheel forward 1 hole
- Move the 5th wheel forward 2 holes
- Move the 5th wheel back 1 hole
- Move the 5th wheel back 2 holes
steer axle: 11,800 pounds
drive axles: 33,700 pounds
CDL Manual Sections To Choose From:
- Introduction
- Driving Safely
- Transporting Cargo Safely
- Transporting Passengers Safely
- Air Brakes
- Combination Vehicles
- Doubles and Triples
- Tank Vehicles
- Hazardous Materials
- School Bus
- Vehicle Inspection
- Basic Vehicle Control Skills Test
- On-Road Driving
- Logbook
- Weight And Balance
- Flatbed Cargo Securement
- New York State Coil Endorsement
CDL Practice Tests
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.
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