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