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