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