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