Tennessee Commercial Driver's License Practice Test: General Knowledge
Your first step is the Tennessee general knowledge test at Driver Services. You'll answer 50 questions. You need 40 correct answers to pass. That's an 80% score. The same test applies to Class A, Class B, and Class C applicants. It's also the base for endorsements like tankers or doubles. Most of the CDL jobs I see around here run out of Nashville, Chattanooga or Memphis, and you'll be using every bit of this on I-40 and I-24 (and on the grades up around Monteagle Mountain, which nobody forgets after the first trip).
What the Tennessee CDL General Knowledge Test Covers
The DSD follows the federal CDL standard for this exam. You'll see 50 questions. You need 40 correct answers to pass. That's an 80 percent score.
Core topics include:
- Vehicle control
- Shifting gears
- Space management
- Cargo securement
- Hazard perception
Air brakes and combination vehicles have separate tests. The general knowledge test still touches on their basics.
This test applies to every commercial applicant. Class A tractor-trailer and Class B dump truck applicants take it. You need the same foundation for Class C too. Think of it as the common language for all commercial driving in Tennessee. You cannot skip it. You cannot substitute experience for it. You have to pass it.
The questions are not designed to trick you. They are designed to see if you understand how a large vehicle behaves differently from a car. For example, you might be asked about off tracking. Off tracking means your trailer wheels cut a shorter path than the tractor wheels. You'll also see weight and stopping distance questions. I'd call those real-world questions, the kind you'll actually run into behind the wheel.
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Your first step is the Tennessee general knowledge test at Driver Services. You'll answer 50 questions. You need 40 correct answers to pass. That's an 80% score. The same test applies to Class A, Class B, and Class C applicants. It's also the base for endorsements like tankers or doubles. Most of the CDL jobs I see around here run out of Nashville, Chattanooga or Memphis, and you'll be using every bit of this on I-40 and I-24 (and on the grades up around Monteagle Mountain, which nobody forgets after the first trip).
What the Tennessee CDL General Knowledge Test Covers
The DSD follows the federal CDL standard for this exam. You'll see 50 questions. You need 40 correct answers to pass. That's an 80 percent score.
Core topics include:
- Vehicle control
- Shifting gears
- Space management
- Cargo securement
- Hazard perception
Air brakes and combination vehicles have separate tests. The general knowledge test still touches on their basics.
This test applies to every commercial applicant. Class A tractor-trailer and Class B dump truck applicants take it. You need the same foundation for Class C too. Think of it as the common language for all commercial driving in Tennessee. You cannot skip it. You cannot substitute experience for it. You have to pass it.
The questions are not designed to trick you. They are designed to see if you understand how a large vehicle behaves differently from a car. For example, you might be asked about off tracking. Off tracking means your trailer wheels cut a shorter path than the tractor wheels. You'll also see weight and stopping distance questions. I'd call those real-world questions, the kind you'll actually run into behind the wheel.
Tennessee5 minEasy20 questions
Tests Verified by Daniel Gonzalez
Experienced teacher & Instructional Designer
"These practice tests are built from the DMV handbook to help you actually learn the rules and pass the driving test with confidence"
Vehicle Control and Safety on Tennessee Freight Routes
Tennessee terrain shapes the test. Freight moves through Memphis and over mountain grades near Knoxville.
You'll see questions on:
- Safe speed
- Following distance
- Space management
I-40 is packed with trucks most hours of the day, and coming through the Ridgecut on I-24 in Chattanooga you get steep downgrades with sharp curves stacked on top, so you hold your speed with the right gear and the engine brake instead of riding the service brakes until they fade on you.
Stopping distance is a huge topic. A fully loaded tractor-trailer needs much more room than a pickup at highway speed. You'll see questions on total stopping distance. That distance has four parts:
- Perception time
- Reaction time
- Brake lag
- Actual braking distance
Tennessee's hills make this even more important. What works on a flat stretch near Jackson might not work coming down from the Unaka Mountains. You need to increase your following distance in bad weather. And on a long descent I'd keep an eye on brake fade the whole way down. The test rewards planning ahead.
Space management is another key area. A truck has big blind spots, and you need to know where every one of them is and how you'd check it before you move over. The room out front counts just as much, because tailgating in a rig that heavy is asking for a wreck, and the test will ask how much space to leave when conditions change. I want my students leaving that gap without even thinking about it.
How I-40 and I-24 Shape Tennessee CDL Basics
I-40 goes east to west from Memphis through Nashville and on to Knoxville, and I-24 comes down out of Clarksville, through Nashville and over to Chattanooga. These are not quiet country roads. They're high-volume freight corridors. So the test throws a fair number of lane discipline and merging questions at you, and it expects you to let the cars around you know what you're about to do when the interstate's busy. Use your signals early. Look at your mirrors every time before you change lanes, and get back out of the left lane once you're past. Tennessee law says keep right except to pass. That applies to big trucks too.
Blind spots matter on these routes. A car can disappear beside your trailer. You need to know the no zones. The test will ask about them. You might have to identify where a small vehicle is hardest to see. The answer is usually along the right side of your trailer and directly behind you. On I-24 near Nashville, traffic weaves constantly. You have to be ready for a car to cut in front of you. That means leaving an escape route. The test calls this having an out.
Up in East Tennessee some stretches of I-81 are a lot calmer, with trucks still rolling but at a more relaxed pace, though you still signal and watch your mirrors and keep your speed in check. Whether you're on a crowded loop in Memphis or a two lane road outside Johnson City, the test expects the same habits from you.
General-Knowledge Questions Tennessee Drivers Miss
Some questions trip up even experienced drivers. One common mistake is misjudging stopping distance. People think a truck stops in about the same distance as a car. That is wrong. A fully loaded tractor trailer can take twice as long to stop, sometimes more. The test will throw in numbers. You need to know the difference between perception distance and braking distance. This one trips people up.
Another area where applicants stumble is cargo weight limits. You need to understand gross vehicle weight rating, or GVWR. You need to know how axle weight limits work. In Tennessee, you might see questions about bridge formulas or how to distribute weight in a trailer. If you load too much weight on the drive axles, you could be over the legal limit. The test expects you to know how to check that.
Pre trip inspections are another source of errors. A tire-check question may sound basic. But they'll ask about tread depth and cuts and bulges, so you've got to know what a bad tire looks like, and you need the pre-trip inspection order down because skipping a step is how a real defect slips by you.
Thinking through the situation will get you further than rote memorization here. Two answers might look right. When that happens I always tell people to go with the safest one, like a question where the truck starts to skid and one choice says steer into the skid. Another says brake hard. The right move is steering into the skid and staying off the brake, and the CDL manual spells that out if you want to double-check it.
Studying for the Tennessee CDL General Knowledge Exam
Reading the manual one time and hoping for the best almost never works, so I'd set up a plan and run full 50-question practice sets over and over. This builds recall speed. The real test has a generous time limit. You still want to answer confidently. A good tennessee commercial driver's license practice test will show you where you are weak. Maybe it is cargo securement. Maybe it is space management. Use those results.
After each practice set, return to the CDL manual. Re read the sections behind every missed question. Miss a downgrade question and you go back to the downgrade pages, miss one on emergency equipment and you read that part again, and either way you want to see why the answer's right instead of just memorizing it. That builds the knowledge to pass.
Master general knowledge before adding endorsement study. Do not try to study for tankers and doubles at the same time as general knowledge. You will overload yourself. Pass the base test first. Then add endorsements one at a time. Tennessee offers work for drivers with endorsements. You can't get those without passing general knowledge first.
A tennessee cdl practice test questions set can help you get comfortable with the format. The real test is multiple choice. Some questions have four options. You need the best answer. Practice tests simulate that. They also help with time management. The cdl test tennessee drivers face is not impossible. It just requires preparation. Put in the time. Take practice tests. Review your mistakes. You will walk into the DSD office ready to pass.
Tennessee CDL General Knowledge FAQs
How many questions are on the Tennessee CDL general knowledge test?
You'll get 50 questions on the Tennessee general knowledge test. You need 40 correct answers to pass. That is an 80 percent score. Whether you're going for Class A, B or C, it's the same test.
What passing score do you need for the Tennessee CDL exam?
You've got to hit at least 80 percent, which works out to 40 right out of 50, and if it doesn't go your way you can come back and retake it.
Does general knowledge apply to Class A, B, and C in Tennessee?
Yes. The general knowledge test is required for every commercial learner permit. Every applicant takes it, from Class A tractor-trailer drivers down to Class C.
What topics are on the Tennessee general knowledge test?
The test covers:
- Vehicle control
- Shifting
- Space management
- Cargo basics
- Spotting hazards
There'll be questions on pre-trip inspections and stopping distance mixed in too, along with general safe driving. Endorsement tests cover additional topics.
What general-knowledge mistakes do Tennessee drivers make?
Many drivers misjudge stopping distance. Others struggle with cargo weight limits and pre trip inspection details. Scenario questions trick applicants when two choices seem correct. When you're stuck between two, go with whatever the CDL manual would call the safest choice.
See more
Vehicle Control and Safety on Tennessee Freight Routes
Tennessee terrain shapes the test. Freight moves through Memphis and over mountain grades near Knoxville.
You'll see questions on:
- Safe speed
- Following distance
- Space management
I-40 is packed with trucks most hours of the day, and coming through the Ridgecut on I-24 in Chattanooga you get steep downgrades with sharp curves stacked on top, so you hold your speed with the right gear and the engine brake instead of riding the service brakes until they fade on you.
Stopping distance is a huge topic. A fully loaded tractor-trailer needs much more room than a pickup at highway speed. You'll see questions on total stopping distance. That distance has four parts:
- Perception time
- Reaction time
- Brake lag
- Actual braking distance
Tennessee's hills make this even more important. What works on a flat stretch near Jackson might not work coming down from the Unaka Mountains. You need to increase your following distance in bad weather. And on a long descent I'd keep an eye on brake fade the whole way down. The test rewards planning ahead.
Space management is another key area. A truck has big blind spots, and you need to know where every one of them is and how you'd check it before you move over. The room out front counts just as much, because tailgating in a rig that heavy is asking for a wreck, and the test will ask how much space to leave when conditions change. I want my students leaving that gap without even thinking about it.
How I-40 and I-24 Shape Tennessee CDL Basics
I-40 goes east to west from Memphis through Nashville and on to Knoxville, and I-24 comes down out of Clarksville, through Nashville and over to Chattanooga. These are not quiet country roads. They're high-volume freight corridors. So the test throws a fair number of lane discipline and merging questions at you, and it expects you to let the cars around you know what you're about to do when the interstate's busy. Use your signals early. Look at your mirrors every time before you change lanes, and get back out of the left lane once you're past. Tennessee law says keep right except to pass. That applies to big trucks too.
Blind spots matter on these routes. A car can disappear beside your trailer. You need to know the no zones. The test will ask about them. You might have to identify where a small vehicle is hardest to see. The answer is usually along the right side of your trailer and directly behind you. On I-24 near Nashville, traffic weaves constantly. You have to be ready for a car to cut in front of you. That means leaving an escape route. The test calls this having an out.
Up in East Tennessee some stretches of I-81 are a lot calmer, with trucks still rolling but at a more relaxed pace, though you still signal and watch your mirrors and keep your speed in check. Whether you're on a crowded loop in Memphis or a two lane road outside Johnson City, the test expects the same habits from you.
General-Knowledge Questions Tennessee Drivers Miss
Some questions trip up even experienced drivers. One common mistake is misjudging stopping distance. People think a truck stops in about the same distance as a car. That is wrong. A fully loaded tractor trailer can take twice as long to stop, sometimes more. The test will throw in numbers. You need to know the difference between perception distance and braking distance. This one trips people up.
Another area where applicants stumble is cargo weight limits. You need to understand gross vehicle weight rating, or GVWR. You need to know how axle weight limits work. In Tennessee, you might see questions about bridge formulas or how to distribute weight in a trailer. If you load too much weight on the drive axles, you could be over the legal limit. The test expects you to know how to check that.
Pre trip inspections are another source of errors. A tire-check question may sound basic. But they'll ask about tread depth and cuts and bulges, so you've got to know what a bad tire looks like, and you need the pre-trip inspection order down because skipping a step is how a real defect slips by you.
Thinking through the situation will get you further than rote memorization here. Two answers might look right. When that happens I always tell people to go with the safest one, like a question where the truck starts to skid and one choice says steer into the skid. Another says brake hard. The right move is steering into the skid and staying off the brake, and the CDL manual spells that out if you want to double-check it.
Studying for the Tennessee CDL General Knowledge Exam
Reading the manual one time and hoping for the best almost never works, so I'd set up a plan and run full 50-question practice sets over and over. This builds recall speed. The real test has a generous time limit. You still want to answer confidently. A good tennessee commercial driver's license practice test will show you where you are weak. Maybe it is cargo securement. Maybe it is space management. Use those results.
After each practice set, return to the CDL manual. Re read the sections behind every missed question. Miss a downgrade question and you go back to the downgrade pages, miss one on emergency equipment and you read that part again, and either way you want to see why the answer's right instead of just memorizing it. That builds the knowledge to pass.
Master general knowledge before adding endorsement study. Do not try to study for tankers and doubles at the same time as general knowledge. You will overload yourself. Pass the base test first. Then add endorsements one at a time. Tennessee offers work for drivers with endorsements. You can't get those without passing general knowledge first.
A tennessee cdl practice test questions set can help you get comfortable with the format. The real test is multiple choice. Some questions have four options. You need the best answer. Practice tests simulate that. They also help with time management. The cdl test tennessee drivers face is not impossible. It just requires preparation. Put in the time. Take practice tests. Review your mistakes. You will walk into the DSD office ready to pass.
Tennessee CDL General Knowledge FAQs
How many questions are on the Tennessee CDL general knowledge test?
You'll get 50 questions on the Tennessee general knowledge test. You need 40 correct answers to pass. That is an 80 percent score. Whether you're going for Class A, B or C, it's the same test.
What passing score do you need for the Tennessee CDL exam?
You've got to hit at least 80 percent, which works out to 40 right out of 50, and if it doesn't go your way you can come back and retake it.
Does general knowledge apply to Class A, B, and C in Tennessee?
Yes. The general knowledge test is required for every commercial learner permit. Every applicant takes it, from Class A tractor-trailer drivers down to Class C.
What topics are on the Tennessee general knowledge test?
The test covers:
- Vehicle control
- Shifting
- Space management
- Cargo basics
- Spotting hazards
There'll be questions on pre-trip inspections and stopping distance mixed in too, along with general safe driving. Endorsement tests cover additional topics.
What general-knowledge mistakes do Tennessee drivers make?
Many drivers misjudge stopping distance. Others struggle with cargo weight limits and pre trip inspection details. Scenario questions trick applicants when two choices seem correct. When you're stuck between two, go with whatever the CDL manual would call the safest choice.
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