Iowa General Knowledge Practice Test
This is our Iowa 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
Congratulations! You have completed the General Knowledge CDL Practice Quiz.
You scored %%SCORE%% out of %%TOTAL%%.
Your performance has been rated as %%RATING%%
Pass your CDL Knowledge Exam the first time! Click here to get the Complete CDL Cheat Sheet Study Package for all 50 states! Question 1 |
A | Slow to a safe speed before the curve. |
B | Downshift after you are in the curve. |
C | Turn on your four-way flashers as you approach the offramp. |
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 2 |
A | both of these. |
B | the legal weight limits. |
C | neither of these. |
D | the weight of the liquid. |
Question 3 |
A | vehicles, traffic signs |
B | tunnels, overpasses |
C | law enforcement officers, detours |
D | truck stops, gas stations |
Question 4 |
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 5 |
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 6 |
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 7 |
A | three or more. |
B | seven or more. |
C | five or more. |
D | none of these. |
Question 8 |
A | stop to sleep. |
B | roll down the windows. |
C | turn up the radio. |
D | slap yourself in the face three times. |
Question 9 |
A | Electrical fire. |
B | Grease fire. |
C | Gasoline fire. |
D | None of these fires can be safely extinguished by water. |
Question 10 |
A | rust |
B | rubbing |
C | burning |
D | leaks |
Question 11 |
A | it is absolutely necessary. |
B | testing the trailer brakes after hooking up to a trailer. |
C | you will be parked for a short time. |
D | there is ice and snow, to prevent skidding. |
Question 12 |
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 13 |
A | three |
B | one |
C | two |
D | four |
Question 14 |
A | A minimum of three. |
B | A minimum of one. |
C | A minimum of two. |
D | A minimum of four. |
Question 15 |
A | turn wide as you complete the turn |
B | turn right and drive over the curb |
C | start the turn, then back up to re-position |
D | turn wide before you start the turn |
Question 16 |
A | road conditions are excellent. |
B | the road is wet, icy, or snow covered. |
C | you are driving on hilly, rural roads. |
D | you are driving on the freeway. |
Question 17 |
A | fishtailing. |
B | slidetracking. |
C | sidetracking. |
D | offtracking. |
Question 18 |
A | The same amount of space you would on a dry road. |
B | The same amount of space you would at night. |
C | More space than is needed for ideal driving conditions. |
D | One vehicle length for every 10,000 lb. of gross vehicle weight. |
Question 19 |
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 20 |
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 21 |
A | the trailer is out of brake adjustment. |
B | the trailer is being hauled at high speed. |
C | the trailer is empty or lightly loaded. |
D | the trailer is fully loaded or very heavy. |
Question 22 |
A | Using turn signals, 4-way flashers, headlights, and the horn. |
B | Using your CB radio or cell phone to inform others. |
C | Using hand signals. |
D | Using a helper when backing up. |
Question 23 |
A | four times |
B | two times |
C | half |
D | three times |
Question 24 |
A | mirrors |
B | sunglasses |
C | rolled down windows |
D | rear view cameras |
Question 25 |
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 26 |
A | the brake pedal feels firm when you apply pressure. |
B | there is a slight vibration when you press down on the brake pedal. |
C | you release pressure on the brake pedal and speed increases. |
D | you have to push harder and harder to get the same stopping power on a downgrade. |
Question 27 |
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 only water in the cooling system. |
D | use windshield washer fluid as coolant. |
Question 28 |
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 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 | 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 31 |
A | to avoid mixing hazmat with food. |
B | to warn others of hazardous materials. |
C | to combat terrorism. |
D | to make your vehicle look official. |
Question 32 |
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 33 |
A | one inch |
B | two inches |
C | one half inch |
D | three inches |
Question 34 |
A | eating spicy food in the truck cab |
B | loose fuel connections |
C | both loose fuel connections and under inflated tires |
D | under inflated tires |
Question 35 |
A | exempt from hazardous materials restrictions. |
B | exempt from height restrictions. |
C | generally used when freight is carried part way by rail or ship. |
D | exempt from weight limit restrictions. |
Question 36 |
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 37 |
A | Keep your low beam lights on. |
B | Put your warning devices out within 15 minutes. |
C | Turn on your 4-way emergency flashers to warn other drivers. |
D | Warn other drivers by using your left turn signal lights. |
Question 38 |
A | require greater stopping distance than full trucks |
B | need less space ahead than full trucks |
C | have the same stopping distance as full trucks |
D | have better traction when stopping than full trucks |
Question 39 |
A | seal is secure. |
B | seal is authentic. |
C | load is properly secured. |
D | placard numbers match the seal numbers. |
Question 40 |
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 41 |
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 42 |
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 43 |
A | before starting down a hill and before entering a tunnel. |
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 going up a hill. |
Question 44 |
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 45 |
A | whenever you stop to refuel. |
B | if any problems occurred the last the time the vehicle was operated. |
C | before operating the vehicle. |
D | at least once a week. |
Question 46 |
A | Use the same gear you would use to climb the hill. |
B | Use a lower 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 higher gear than you would use to climb the hill. |
Question 47 |
A | A stopped transit bus. |
B | Road construction zones. |
C | All of these are considered a hazard. |
D | Pedestrians and bicyclists. |
Question 48 |
A | bad tires. |
B | driving too slow for road conditions. |
C | poorly adjusted brakes. |
D | driving too fast for road conditions. |
Question 49 |
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 it is a requirement for all drivers. |
D | because law enforcement may inspect your vehicle on the road. |
Question 50 |
A | 4/32-inch in every major groove. |
B | 3/32-inch in every major groove. |
C | 5/32-inch in every major groove. |
D | 2/32-inch in every major groove. |
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| 31 | 32 | 33 | 34 | 35 |
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| 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
Congratulations! You have completed the General Knowledge CDL Practice Test.
You scored %%SCORE%% out of %%TOTAL%%.
Your performance has been rated as %%RATING%%
Pass your CDL Knowledge Exam the first time! Click here to get the Complete CDL Cheat Sheet Study Package for all 50 states! Question 1 |
A | start the turn, then back up to re-position |
B | turn right and drive over the curb |
C | turn wide as you complete the turn |
D | turn wide before you start the turn |
Question 2 |
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 entering a tunnel. |
D | before starting down a hill and before going up a hill. |
Question 3 |
A | 3/32-inch in every major groove. |
B | 4/32-inch in every major groove. |
C | 5/32-inch in every major groove. |
D | 2/32-inch in every major groove. |
Question 4 |
A | Because some liquids expand more than others when they get warm. |
B | Because it's good to know that information. |
C | Because some of the heaviest liquids don’t need any. |
D | Because tank baffles are not always legal with outage. |
Question 5 |
A | Using your CB radio or cell phone to inform others. |
B | Using turn signals, 4-way flashers, headlights, and the horn. |
C | Using hand signals. |
D | Using a helper when backing up. |
Question 6 |
A | under-inflated tires, dual tires that touch |
B | poor-quality retreads, under-inflated tires |
C | dual tires that touch, hot road surfaces |
D | over-heated brakes, under-inflated tires |
Question 7 |
A | two times |
B | half |
C | three times |
D | four times |
Question 8 |
A | The drinker's brain is increasingly affected. |
B | All of these things happen. |
C | Judgment and self-control are the first to be affected. |
D | Muscle control and coordination are affected. |
Question 9 |
A | All of these are considered a hazard. |
B | A stopped transit bus. |
C | Road construction zones. |
D | Pedestrians and bicyclists. |
Question 10 |
A | seal is secure. |
B | placard numbers match the seal numbers. |
C | seal is authentic. |
D | load is properly secured. |
Question 11 |
A | Too many vertical stacks. |
B | Oil on the tie rod. |
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 12 |
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 | drink coffee or other caffeine products to 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 13 |
A | to warn others of hazardous materials. |
B | to make your vehicle look official. |
C | to combat terrorism. |
D | to avoid mixing hazmat with food. |
Question 14 |
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 15 |
A | the lug nut needs to be replaced. |
B | the wheel needs cleaning. |
C | the lug nut is loose. |
D | the lug nut is cheap. |
Question 16 |
A | three inches |
B | two inches |
C | one inch |
D | one half inch |
Question 17 |
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 18 |
A | both of these. |
B | neither of these. |
C | the weight of the liquid. |
D | the legal weight limits. |
Question 19 |
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 20 |
A | A minimum of three. |
B | A minimum of two. |
C | A minimum of one. |
D | A minimum of four. |
Question 21 |
A | Load cargo weight evenly over all the axles. |
B | Load cargo toward the rear of the truck for easier unloading. |
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 22 |
A | overinflated tires |
B | loose fuel connections |
C | both loose fuel connections and under inflated tires |
D | underinflated tires |
Question 23 |
A | sunglasses |
B | rolled down windows |
C | rear view cameras |
D | mirrors |
Question 24 |
A | slidetracking. |
B | fishtailing. |
C | sidetracking. |
D | offtracking. |
Question 25 |
A | one |
B | two |
C | four |
D | three |
Question 26 |
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 27 |
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 28 |
A | the trailer is out of brake adjustment. |
B | the trailer is empty or lightly loaded. |
C | the trailer is fully loaded or very heavy. |
D | the trailer is being hauled at high speed. |
Question 29 |
A | Put your warning devices out within 15 minutes. |
B | Turn on your 4-way emergency flashers to warn other drivers. |
C | Keep your low beam lights on. |
D | Warn other drivers by using your left turn signal lights. |
Question 30 |
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 31 |
A | decreases when the service breaks are hot. |
B | depends on the service brakes being in adjustment. |
C | is not affected by the condition of the service brakes. |
D | increases when the service brakes are hot. |
Question 32 |
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 33 |
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 | you have to push harder and harder to get the same stopping power on a downgrade. |
D | the brake pedal feels firm when you apply pressure. |
Question 34 |
A | five or more. |
B | seven or more. |
C | three or more. |
D | none of these. |
Question 35 |
A | To prevent others from distracting you. |
B | To see the blind spots you can't see. |
C | To direct traffic away from you. |
D | To watch for steering errors. |
Question 36 |
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 37 |
A | stop to sleep. |
B | roll down the windows. |
C | turn up the radio. |
D | slap yourself in the face three times. |
Question 38 |
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 39 |
A | use only water in the cooling system. |
B | check the coolant level of a hot engine. |
C | use windshield washer fluid as coolant. |
D | safely remove the radiator cap and add coolant while the engine is hot. |
Question 40 |
A | exempt from height restrictions. |
B | generally used when freight is carried part way by rail or ship. |
C | exempt from hazardous materials restrictions. |
D | exempt from weight limit restrictions. |
Question 41 |
A | bad tires. |
B | driving too slow for road conditions. |
C | poorly adjusted brakes. |
D | driving too fast for road conditions. |
Question 42 |
A | Electrical fire. |
B | None of these fires can be safely extinguished by water. |
C | Grease fire. |
D | Gasoline fire. |
Question 43 |
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 44 |
A | burning |
B | leaks |
C | rubbing |
D | rust |
Question 45 |
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 46 |
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 47 |
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 48 |
A | vehicles, traffic signs |
B | law enforcement officers, detours |
C | tunnels, overpasses |
D | truck stops, gas stations |
Question 49 |
A | it is absolutely necessary. |
B | there is ice and snow, to prevent skidding. |
C | you will be parked for a short time. |
D | testing the trailer brakes after hooking up to a trailer. |
Question 50 |
A | to ensure safety for yourself, your passengers, and other drivers. |
B | because law enforcement may inspect your vehicle on the road. |
C | to help ensure the vehicle will make it to your destination. |
D | because it is a requirement for all drivers. |
← |
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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