Tennessee General Knowledge Practice Test
This is our Tennessee General Knowledge Practice Quiz and Practice Test compiled of 50 questions each. Each question is worth two points for a total of 100 possible points. A passing score is 80%.
The General Knowledge Practice Quiz reveals the correct answer during each question to help you study for the actual General Knowledge test. The General Knowledge Practice Test doesn’t reveal the correct answers until the test is over.
The questions and answers are given in random order each time you retake the test. When you are finished testing, simply click on the “Get Results” button to see your test results. Clicking on the blue “List” button will reveal a list of all the questions you answered correctly and incorrectly. To take the test again, just refresh your browser window. It’s that easy.
Press the start button to begin your free General Knowledge Practice Quiz. Good luck!
General Knowledge CDL Practice Quiz

Question 1 |
A | keep two hands firmly planted on the steering wheel at all times. |
B | keep the cargo as close to the ground as possible. |
C | downshift into the turn. |
D | check to make sure that the brakes are properly balanced. |
Question 2 |
A | because it is a requirement for all drivers. |
B | to help ensure the vehicle will make it to your destination. |
C | to ensure safety for yourself, your passengers, and other drivers. |
D | because law enforcement may inspect your vehicle on the road. |
Question 3 |
A | A minimum of four. |
B | A minimum of two. |
C | A minimum of one. |
D | A minimum of three. |
Question 4 |
A | a dry bulk tank should only be filled halfway. |
B | the load can shift. |
C | the load should not get wet. |
D | the load can catch fire easily. |
Question 5 |
A | Because some of the heaviest liquids don’t need any. |
B | Because tank baffles are not always legal with outage. |
C | Because it's good to know that information. |
D | Because some liquids expand more than others when they get warm. |
Question 6 |
A | five or more. |
B | seven or more. |
C | none of these. |
D | three or more. |
Question 7 |
A | you are driving on hilly, rural roads. |
B | you are driving on the freeway. |
C | the road is wet, icy, or snow covered. |
D | road conditions are excellent. |
Question 8 |
A | turn wide as you complete the turn |
B | turn right and drive over the curb |
C | start the turn, then back up to re-position |
D | turn wide before you start the turn |
Question 9 |
A | Pump the brake pedal 5 times; push the pedal firmly 3 seconds; the pedal should not move. |
B | Move forward slowly and push firmly on the brake pedal. |
C | Pump the brake pedal 3 times; push the pedal firmly 5 seconds; the pedal should not move. |
D | Push the brake pedal firmly 5 seconds; listen for leaks. |
Question 10 |
A | Load more cargo toward the front of the truck for a full load. |
B | Load more weight over the drive axle for better traction. |
C | Load cargo toward the rear of the truck for easier unloading. |
D | Load cargo weight evenly over all the axles. |
Question 11 |
A | need less space ahead than full trucks |
B | have the same stopping distance as full trucks |
C | have better traction when stopping than full trucks |
D | require greater stopping distance than full trucks |
Question 12 |
A | Muscle control and coordination are affected. |
B | The drinker's brain is increasingly affected. |
C | All of these things happen. |
D | Judgment and self-control are the first to be affected. |
Question 13 |
A | before operating the vehicle. |
B | if any problems occurred the last the time the vehicle was operated. |
C | whenever you stop to refuel. |
D | at least once a week. |
Question 14 |
A | bad tires. |
B | driving too slow for road conditions. |
C | driving too fast for road conditions. |
D | poorly adjusted brakes. |
Question 15 |
A | decreases when the service breaks are hot. |
B | increases when the service brakes are hot. |
C | depends on the service brakes being in adjustment. |
D | is not affected by the condition of the service brakes. |
Question 16 |
A | roll down your window so that the fresh air will help keep you awake. |
B | make sure you are driving slow enough so you can stop within the range of your headlights in case of an emergency. |
C | drink coffee or other caffeine products to help keep you awake. |
D | keep your high beams on at all times. |
Question 17 |
A | the trailer is empty or lightly loaded. |
B | the trailer is being hauled at high speed. |
C | the trailer is out of brake adjustment. |
D | the trailer is fully loaded or very heavy. |
Question 18 |
A | three times |
B | two times |
C | half |
D | four times |
Question 19 |
A | the end of the kingpin is even with the top of the fifth wheel. |
B | it will be raised slightly when the tractor is backed under it. |
C | the end of the kingpin is at waist level. |
D | the kingpin is about 1¼ inches above the fifth wheel. |
Question 20 |
A | Using turn signals, 4-way flashers, headlights, and the horn. |
B | Using your CB radio or cell phone to inform others. |
C | Using a helper when backing up. |
D | Using hand signals. |
Question 21 |
A | the weight of the liquid. |
B | the legal weight limits. |
C | neither of these. |
D | both of these. |
Question 22 |
A | exempt from hazardous materials restrictions. |
B | exempt from height restrictions. |
C | exempt from weight limit restrictions. |
D | generally used when freight is carried part way by rail or ship. |
Question 23 |
A | roll down the windows. |
B | slap yourself in the face three times. |
C | turn up the radio. |
D | stop to sleep. |
Question 24 |
A | Keep your low beam lights on. |
B | Put your warning devices out within 15 minutes. |
C | Turn on your 4-way emergency flashers to warn other drivers. |
D | Warn other drivers by using your left turn signal lights. |
Question 25 |
A | rubbing |
B | rust |
C | burning |
D | leaks |
Question 26 |
A | the lug nut is cheap. |
B | the wheel needs cleaning. |
C | the lug nut is loose. |
D | the lug nut needs to be replaced. |
Question 27 |
A | Use a lower gear than you would use to climb the hill. |
B | Use the same gear you would use to climb the hill. |
C | Use a higher gear than you would use to climb the hill. |
D | Shift the truck into neutral and coast down the hill to save gas. |
Question 28 |
A | To direct traffic away from you. |
B | To prevent others from distracting you. |
C | To watch for steering errors. |
D | To see the blind spots you can't see. |
Question 29 |
A | Pedestrians and bicyclists. |
B | A stopped transit bus. |
C | All of these are considered a hazard. |
D | Road construction zones. |
Question 30 |
A | it is absolutely necessary. |
B | you will be parked for a short time. |
C | testing the trailer brakes after hooking up to a trailer. |
D | there is ice and snow, to prevent skidding. |
Question 31 |
A | under-inflated tires, dual tires that touch |
B | dual tires that touch, hot road surfaces |
C | poor-quality retreads, under-inflated tires |
D | over-heated brakes, under-inflated tires |
Question 32 |
A | Perception distance, response distance, and reaction distance. |
B | Perception distance, reaction distance, and braking distance. |
C | Observation distance, reaction distance, and slowing distance. |
D | Perception distance, slowing distance, and braking distance. |
Question 33 |
A | Too many vertical stacks. |
B | Play in the steering wheel of more than ten degrees (two inches on a 20-inch steering wheel). |
C | Oil on the tie rod. |
D | Play in the steering wheel of more than five degrees. |
Question 34 |
A | there is a slight vibration when you press down on the brake pedal. |
B | you have to push harder and harder to get the same stopping power on a downgrade. |
C | the brake pedal feels firm when you apply pressure. |
D | you release pressure on the brake pedal and speed increases. |
Question 35 |
A | Shorter stopping distance. |
B | Greater stopping distance. |
C | It depends on what mood you are in at the time. |
D | The same amount of stopping distance. |
Question 36 |
A | to combat terrorism. |
B | to avoid mixing hazmat with food. |
C | to make your vehicle look official. |
D | to warn others of hazardous materials. |
Question 37 |
A | before going up a hill and before entering a curve. |
B | before starting down a hill and before going up a hill. |
C | before starting down a hill and before entering a curve. |
D | before starting down a hill and before entering a tunnel. |
Question 38 |
A | Slow to a safe speed before the curve. |
B | Downshift after you are in the curve. |
C | Nothing, because the posted speed limit for the offramp is usually 10 miles per hour below the safe speed limit for the offramp. |
D | Turn on your four-way flashers as you approach the offramp. |
Question 39 |
A | sunglasses |
B | rolled down windows |
C | mirrors |
D | rear view cameras |
Question 40 |
A | you want to have time to act before it turns into an emergency. |
B | you want to have a plan to communicate the risk. |
C | you want to avoid doing something all of a sudden. |
D | it is a federal law. |
Question 41 |
A | two |
B | four |
C | one |
D | three |
Question 42 |
A | Grease fire. |
B | Gasoline fire. |
C | None of these fires can be safely extinguished by water. |
D | Electrical fire. |
Question 43 |
A | loose fuel connections |
B | under inflated tires |
C | eating spicy food in the truck cab |
D | both loose fuel connections and under inflated tires |
Question 44 |
A | one half inch |
B | one inch |
C | two inches |
D | three inches |
Question 45 |
A | One vehicle length for every 10,000 lb. of gross vehicle weight. |
B | More space than is needed for ideal driving conditions. |
C | The same amount of space you would at night. |
D | The same amount of space you would on a dry road. |
Question 46 |
A | use windshield washer fluid as coolant. |
B | check the coolant level of a hot engine. |
C | safely remove the radiator cap and add coolant while the engine is hot. |
D | use only water in the cooling system. |
Question 47 |
A | offtracking. |
B | sidetracking. |
C | slidetracking. |
D | fishtailing. |
Question 48 |
A | placard numbers match the seal numbers. |
B | load is properly secured. |
C | seal is authentic. |
D | seal is secure. |
Question 49 |
A | vehicles, traffic signs |
B | tunnels, overpasses |
C | truck stops, gas stations |
D | law enforcement officers, detours |
Question 50 |
A | 3/32-inch in every major groove. |
B | 4/32-inch in every major groove. |
C | 2/32-inch in every major groove. |
D | 5/32-inch in every major groove. |
← | List | → |
1 | 2 | 3 | 4 | 5 |
6 | 7 | 8 | 9 | 10 |
11 | 12 | 13 | 14 | 15 |
16 | 17 | 18 | 19 | 20 |
21 | 22 | 23 | 24 | 25 |
26 | 27 | 28 | 29 | 30 |
31 | 32 | 33 | 34 | 35 |
36 | 37 | 38 | 39 | 40 |
41 | 42 | 43 | 44 | 45 |
46 | 47 | 48 | 49 | 50 |
End |
Remember, the General Knowledge Practice Test doesn’t reveal the correct answers until the test is over. The questions and answers are given in random order each time you retake the test. When you are finished testing, simply click on the “Get Results” button to see your test results. Clicking on the blue “List” button will reveal a list of all the questions you answered correctly and incorrectly. To take the test again, just refresh your browser window.
Press the start button to begin your free General Knowledge Practice Test. Good luck!
General Knowledge CDL Practice Test

Question 1 |
A | if any problems occurred the last the time the vehicle was operated. |
B | at least once a week. |
C | before operating the vehicle. |
D | whenever you stop to refuel. |
Question 2 |
A | to avoid mixing hazmat with food. |
B | to make your vehicle look official. |
C | to combat terrorism. |
D | to warn others of hazardous materials. |
Question 3 |
A | offtracking. |
B | slidetracking. |
C | sidetracking. |
D | fishtailing. |
Question 4 |
A | A minimum of one. |
B | A minimum of four. |
C | A minimum of three. |
D | A minimum of two. |
Question 5 |
A | Muscle control and coordination are affected. |
B | All of these things happen. |
C | The drinker's brain is increasingly affected. |
D | Judgment and self-control are the first to be affected. |
Question 6 |
A | Greater stopping distance. |
B | It depends on what mood you are in at the time. |
C | The same amount of stopping distance. |
D | Shorter stopping distance. |
Question 7 |
A | 2/32-inch in every major groove. |
B | 5/32-inch in every major groove. |
C | 3/32-inch in every major groove. |
D | 4/32-inch in every major groove. |
Question 8 |
A | need less space ahead than full trucks |
B | have the same stopping distance as full trucks |
C | require greater stopping distance than full trucks |
D | have better traction when stopping than full trucks |
Question 9 |
A | use only water in the cooling system. |
B | check the coolant level of a hot engine. |
C | safely remove the radiator cap and add coolant while the engine is hot. |
D | use windshield washer fluid as coolant. |
Question 10 |
A | tunnels, overpasses |
B | truck stops, gas stations |
C | vehicles, traffic signs |
D | law enforcement officers, detours |
Question 11 |
A | two |
B | three |
C | one |
D | four |
Question 12 |
A | before going up a hill and before entering a curve. |
B | before starting down a hill and before entering a tunnel. |
C | before starting down a hill and before going up a hill. |
D | before starting down a hill and before entering a curve. |
Question 13 |
A | Use the same gear you would use to climb the hill. |
B | Use a higher gear than you would use to climb the hill. |
C | Shift the truck into neutral and coast down the hill to save gas. |
D | Use a lower gear than you would use to climb the hill. |
Question 14 |
A | stop to sleep. |
B | roll down the windows. |
C | turn up the radio. |
D | slap yourself in the face three times. |
Question 15 |
A | the end of the kingpin is even with the top of the fifth wheel. |
B | the end of the kingpin is at waist level. |
C | it will be raised slightly when the tractor is backed under it. |
D | the kingpin is about 1¼ inches above the fifth wheel. |
Question 16 |
A | The same amount of space you would at night. |
B | More space than is needed for ideal driving conditions. |
C | One vehicle length for every 10,000 lb. of gross vehicle weight. |
D | The same amount of space you would on a dry road. |
Question 17 |
A | Because some of the heaviest liquids don’t need any. |
B | Because it's good to know that information. |
C | Because some liquids expand more than others when they get warm. |
D | Because tank baffles are not always legal with outage. |
Question 18 |
A | Grease fire. |
B | Electrical fire. |
C | None of these fires can be safely extinguished by water. |
D | Gasoline fire. |
Question 19 |
A | over-heated brakes, under-inflated tires |
B | dual tires that touch, hot road surfaces |
C | poor-quality retreads, under-inflated tires |
D | under-inflated tires, dual tires that touch |
Question 20 |
A | one inch |
B | one half inch |
C | two inches |
D | three inches |
Question 21 |
A | drink coffee or other caffeine products to help keep you awake. |
B | make sure you are driving slow enough so you can stop within the range of your headlights in case of an emergency. |
C | keep your high beams on at all times. |
D | roll down your window so that the fresh air will help keep you awake. |
Question 22 |
A | there is a slight vibration when you press down on the brake pedal. |
B | the brake pedal feels firm when you apply pressure. |
C | you release pressure on the brake pedal and speed increases. |
D | you have to push harder and harder to get the same stopping power on a downgrade. |
Question 23 |
A | five or more. |
B | none of these. |
C | three or more. |
D | seven or more. |
Question 24 |
A | Push the brake pedal firmly 5 seconds; listen for leaks. |
B | Pump the brake pedal 5 times; push the pedal firmly 3 seconds; the pedal should not move. |
C | Pump the brake pedal 3 times; push the pedal firmly 5 seconds; the pedal should not move. |
D | Move forward slowly and push firmly on the brake pedal. |
Question 25 |
A | Nothing, because the posted speed limit for the offramp is usually 10 miles per hour below the safe speed limit for the offramp. |
B | Downshift after you are in the curve. |
C | Turn on your four-way flashers as you approach the offramp. |
D | Slow to a safe speed before the curve. |
Question 26 |
A | the trailer is being hauled at high speed. |
B | the trailer is fully loaded or very heavy. |
C | the trailer is empty or lightly loaded. |
D | the trailer is out of brake adjustment. |
Question 27 |
A | exempt from height restrictions. |
B | exempt from weight limit restrictions. |
C | generally used when freight is carried part way by rail or ship. |
D | exempt from hazardous materials restrictions. |
Question 28 |
A | rolled down windows |
B | sunglasses |
C | mirrors |
D | rear view cameras |
Question 29 |
A | driving too slow for road conditions. |
B | driving too fast for road conditions. |
C | bad tires. |
D | poorly adjusted brakes. |
Question 30 |
A | you want to have a plan to communicate the risk. |
B | you want to avoid doing something all of a sudden. |
C | you want to have time to act before it turns into an emergency. |
D | it is a federal law. |
Question 31 |
A | Play in the steering wheel of more than five degrees. |
B | Too many vertical stacks. |
C | Play in the steering wheel of more than ten degrees (two inches on a 20-inch steering wheel). |
D | Oil on the tie rod. |
Question 32 |
A | seal is authentic. |
B | placard numbers match the seal numbers. |
C | seal is secure. |
D | load is properly secured. |
Question 33 |
A | turn wide as you complete the turn |
B | start the turn, then back up to re-position |
C | turn right and drive over the curb |
D | turn wide before you start the turn |
Question 34 |
A | To see the blind spots you can't see. |
B | To watch for steering errors. |
C | To direct traffic away from you. |
D | To prevent others from distracting you. |
Question 35 |
A | neither of these. |
B | the weight of the liquid. |
C | both of these. |
D | the legal weight limits. |
Question 36 |
A | road conditions are excellent. |
B | the road is wet, icy, or snow covered. |
C | you are driving on hilly, rural roads. |
D | you are driving on the freeway. |
Question 37 |
A | there is ice and snow, to prevent skidding. |
B | it is absolutely necessary. |
C | you will be parked for a short time. |
D | testing the trailer brakes after hooking up to a trailer. |
Question 38 |
A | check to make sure that the brakes are properly balanced. |
B | keep two hands firmly planted on the steering wheel at all times. |
C | keep the cargo as close to the ground as possible. |
D | downshift into the turn. |
Question 39 |
A | the lug nut needs to be replaced. |
B | the lug nut is loose. |
C | the wheel needs cleaning. |
D | the lug nut is cheap. |
Question 40 |
A | to help ensure the vehicle will make it to your destination. |
B | because it is a requirement for all drivers. |
C | because law enforcement may inspect your vehicle on the road. |
D | to ensure safety for yourself, your passengers, and other drivers. |
Question 41 |
A | decreases when the service breaks are hot. |
B | depends on the service brakes being in adjustment. |
C | increases when the service brakes are hot. |
D | is not affected by the condition of the service brakes. |
Question 42 |
A | Perception distance, reaction distance, and braking distance. |
B | Perception distance, slowing distance, and braking distance. |
C | Perception distance, response distance, and reaction distance. |
D | Observation distance, reaction distance, and slowing distance. |
Question 43 |
A | Load more weight over the drive axle for better traction. |
B | Load cargo toward the rear of the truck for easier unloading. |
C | Load more cargo toward the front of the truck for a full load. |
D | Load cargo weight evenly over all the axles. |
Question 44 |
A | Pedestrians and bicyclists. |
B | A stopped transit bus. |
C | Road construction zones. |
D | All of these are considered a hazard. |
Question 45 |
A | rubbing |
B | leaks |
C | rust |
D | burning |
Question 46 |
A | a dry bulk tank should only be filled halfway. |
B | the load can catch fire easily. |
C | the load should not get wet. |
D | the load can shift. |
Question 47 |
A | underinflated tires |
B | overinflated tires |
C | loose fuel connections |
D | both loose fuel connections and under inflated tires |
Question 48 |
A | Keep your low beam lights on. |
B | Warn other drivers by using your left turn signal lights. |
C | Turn on your 4-way emergency flashers to warn other drivers. |
D | Put your warning devices out within 15 minutes. |
Question 49 |
A | Using your CB radio or cell phone to inform others. |
B | Using turn signals, 4-way flashers, headlights, and the horn. |
C | Using a helper when backing up. |
D | Using hand signals. |
Question 50 |
A | two times |
B | four times |
C | half |
D | three times |
← | List | → |
1 | 2 | 3 | 4 | 5 |
6 | 7 | 8 | 9 | 10 |
11 | 12 | 13 | 14 | 15 |
16 | 17 | 18 | 19 | 20 |
21 | 22 | 23 | 24 | 25 |
26 | 27 | 28 | 29 | 30 |
31 | 32 | 33 | 34 | 35 |
36 | 37 | 38 | 39 | 40 |
41 | 42 | 43 | 44 | 45 |
46 | 47 | 48 | 49 | 50 |
End |
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