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