Nebraska General Knowledge Practice Test

This is our Nebraska 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

Start

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!

Your answers are highlighted below.

Question 1

Your ______ are the most important way to see the sides and rear of your vehicle.

A	sunglasses
B	mirrors
C	rear view cameras
D	rolled down windows

Question 2

You are exiting a highway using an offramp that curves downhill and you are driving a heavy vehicle. What should you do?

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 3

Which of the following is considered a hazard?

A	A stopped transit bus.
B	All of these are considered a hazard.
C	Pedestrians and bicyclists.
D	Road construction zones.

Question 4

Which of the following methods should you use to test hydraulic brakes for leaks?

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	Pump the brake pedal 5 times; push the pedal firmly 3 seconds; the pedal should not move.
D	Push the brake pedal firmly 5 seconds; listen for leaks.

Question 5

How much stopping distance does a light, empty truck require, compared to the same truck fully loaded and heavy?

A	The same amount of stopping distance.
B	Greater stopping distance.
C	It depends on what mood you are in at the time.
D	Shorter stopping distance.

Question 6

When loading cargo, what is an important rule to remember?

A	Load more cargo toward the front of the truck for a full load.
B	Load cargo weight evenly over all the axles.
C	Load more weight over the drive axle for better traction.
D	Load cargo toward the rear of the truck for easier unloading.

Question 7

When you are driving at night, you should:

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 8

The two driving conditions in which you should downshift are:

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 9

Two things a driver can do to prevent a rollover are, to go slow around turns, and also:

A	keep two hands firmly planted on the steering wheel at all times.
B	downshift into the turn.
C	keep the cargo as close to the ground as possible.
D	check to make sure that the brakes are properly balanced.

Question 10

One reason why dry bulk tanks require special care is because:

A	the load can catch fire easily.
B	the load should not get wet.
C	the load can shift.
D	a dry bulk tank should only be filled halfway.

Question 11

The correct term for a long commercial vehicle's tendency to swing wide on turns is:

A	sidetracking.
B	offtracking.
C	fishtailing.
D	slidetracking.

Question 12

Your stopping distance will increase by ______, if you double your speed.

A	four times
B	two times
C	half
D	three times

Question 13

If your vehicle has a retarder, you should turn it off when:

A	the road is wet, icy, or snow covered.
B	you are driving on the freeway.
C	road conditions are excellent.
D	you are driving on hilly, rural roads.

Question 14

The minimum tread depth that front tires should have for safety is:

A	5/32-inch in every major groove.
B	4/32-inch in every major groove.
C	2/32-inch in every major groove.
D	3/32-inch in every major groove.

Question 15

The two main causes of tire fires are ______ and ______.

A	dual tires that touch, hot road surfaces
B	over-heated brakes, under-inflated tires
C	under-inflated tires, dual tires that touch
D	poor-quality retreads, under-inflated tires

Question 16

The reason placards are used is:

A	to warn others of hazardous materials.
B	to combat terrorism.
C	to make your vehicle look official.
D	to avoid mixing hazmat with food.

Question 17

The braking power of the spring brakes:

A	depends on the service brakes being in adjustment.
B	decreases when the service breaks are hot.
C	increases when the service brakes are hot.
D	is not affected by the condition of the service brakes.

Question 18

Before transporting a sealed load, it is important to check that the:

A	seal is secure.
B	load is properly secured.
C	placard numbers match the seal numbers.
D	seal is authentic.

Question 19

You are operating a new truck with a manual transmission and are about to drive down a long, steep downhill grade? What should you do?

A	Shift the truck into neutral and coast down the hill to save gas.
B	Use the same gear you would use to climb the hill.
C	Use a lower gear than you would use to climb the hill.
D	Use a higher gear than you would use to climb the hill.

Question 20

When driving on a slippery road during the day, how much space should you keep ahead of your truck?

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 21

Before backing under, when coupling a semi-trailer to your tractor, the trailer is at the right height when:

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 22

Rust around a lug nut is a sign that:

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 23

What happens as a person's Blood Alcohol Concentration (BAC) goes up?

A	Muscle control and coordination are affected.
B	Judgment and self-control are the first to be affected.
C	All of these things happen.
D	The drinker's brain is increasingly affected.

Question 24

The trailer hand valve (also called the trolley valve or Johnson bar) should only be used when:

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 25

While doing the pre-trip inspection on your vehicle's steering and exhaust system you found the following problems. Which one, if any, should be fixed before you drive the vehicle?

A	Oil on the tie rod.
B	Play in the steering wheel of more than five degrees.
C	Too many vertical stacks.
D	Play in the steering wheel of more than ten degrees (two inches on a 20-inch steering wheel).

Question 26

You should make emergency plans when you see a hazard because:

A	it is a federal law.
B	you want to avoid doing something all of a sudden.
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 27

Serious vehicle skids are usually caused by:

A	bad tires.
B	driving too fast for road conditions.
C	poorly adjusted brakes.
D	driving too slow for road conditions.

Question 28

Any flatbed load must have at least ______ tie downs.

A	four
B	three
C	one
D	two

Question 29

If you become sleepy while driving, you should:

A	roll down the windows.
B	slap yourself in the face three times.
C	turn up the radio.
D	stop to sleep.

Question 30

When driving a slow-moving vehicle on a 2-lane highway, you must pull off at the first safe turnout when the number of vehicles behind you is:

A	seven or more.
B	none of these.
C	three or more.
D	five or more.

Question 31

Whenever you are parked at the side of the road at night, you must do which of the following?

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 32

What three things add up to the total stopping distance for your vehicle?

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 33

Empty trucks ______.

A	require greater stopping distance than full trucks
B	have the same stopping distance as full trucks
C	have better traction when stopping than full trucks
D	need less space ahead than full trucks

Question 34

Due to its size, if your vehicle cannot make a right turn without swinging into another lane, you should ______ to prevent others from passing you on the right.

A	turn wide as you complete the turn
B	turn wide before you start the turn
C	turn right and drive over the curb
D	start the turn, then back up to re-position

Question 35

When a coolant container is part of a pressurized system, you can:

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 36

The most important reason for conducting a pre-trip inspection of your vehicle is:

A	to help ensure the vehicle will make it to your destination.
B	to ensure safety for yourself, your passengers, and other drivers.
C	because it is a requirement for all drivers.
D	because law enforcement may inspect your vehicle on the road.

Question 37

______ can cause a fire.

A	eating spicy food in the truck cab
B	both loose fuel connections and under inflated tires
C	loose fuel connections
D	under inflated tires

Question 38

Which of the following fires can be safely extinguished by water?

A	Gasoline fire.
B	Electrical fire.
C	None of these fires can be safely extinguished by water.
D	Grease fire.

Question 39

The amount of liquid to load into a tank depends on:

A	neither of these.
B	the legal weight limits.
C	the weight of the liquid.
D	both of these.

Question 40

Why should know the outage needed for the liquids you carry?

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 41

When checking the adjustment on air brakes, slack adjusters should have ______ of travel.

A	one half inch
B	three inches
C	one inch
D	two inches

Question 42

A pre-trip inspection should be completed:

A	at least once a week.
B	before operating the vehicle.
C	whenever you stop to refuel.
D	if any problems occurred the last the time the vehicle was operated.

Question 43

How many red reflective triangles should be in your vehicle's emergency equipment?

A	A minimum of four.
B	A minimum of one.
C	A minimum of two.
D	A minimum of three.

Question 44

Wheel bearing seals should be checked for ______.

A	leaks
B	rubbing
C	burning
D	rust

Question 45

When backing your vehicle, why should you use a helper?

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 46

Containerized loads are:

A	exempt from hazardous materials restrictions.
B	generally used when freight is carried part way by rail or ship.
C	exempt from height restrictions.
D	exempt from weight limit restrictions.

Question 47

A trailer is more likely to swing around when the trailer wheels lock up when:

A	the trailer is empty or lightly loaded.
B	the trailer is being hauled at high speed.
C	the trailer is fully loaded or very heavy.
D	the trailer is out of brake adjustment.

Question 48

With regard to safe driving, what does communicating mean?

A	Using your CB radio or cell phone to inform others.
B	Using a helper when backing up.
C	Using turn signals, 4-way flashers, headlights, and the horn.
D	Using hand signals.

Question 49

Two main things to look for up ahead while driving are ______ and ______.

A	vehicles, traffic signs
B	truck stops, gas stations
C	law enforcement officers, detours
D	tunnels, overpasses

Question 50

You know your brakes are fading when:

A	the brake pedal feels firm when you apply pressure.
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	there is a slight vibration when you press down on the brake pedal.

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"Dude, Go Back to Truck Driving School" because you FAILED!

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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

Start

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!

Your answers are highlighted below.

Question 1

A pre-trip inspection should be completed:

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 2

When you are driving at night, you should:

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 3

Before backing under, when coupling a semi-trailer to your tractor, the trailer is at the right height when:

A	the end of the kingpin is even with the top of the fifth wheel.
B	the end of the kingpin is at waist level.
C	the kingpin is about 1¼ inches above the fifth wheel.
D	it will be raised slightly when the tractor is backed under it.

Question 4

When checking the adjustment on air brakes, slack adjusters should have ______ of travel.

A	two inches
B	one half inch
C	one inch
D	three inches

Question 5

What three things add up to the total stopping distance for your vehicle?

A	Perception distance, response distance, and reaction distance.
B	Perception distance, reaction distance, and braking distance.
C	Observation distance, reaction distance, and slowing distance.
D	Perception distance, slowing distance, and braking distance.

Question 6

Which of the following methods should you use to test hydraulic brakes for leaks?

A	Pump the brake pedal 3 times; push the pedal firmly 5 seconds; the pedal should not move.
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	Push the brake pedal firmly 5 seconds; listen for leaks.

Question 7

Whenever you are parked at the side of the road at night, you must do which of the following?

A	Put your warning devices out within 15 minutes.
B	Keep your low beam lights on.
C	Turn on your 4-way emergency flashers to warn other drivers.
D	Warn other drivers by using your left turn signal lights.

Question 8

Wheel bearing seals should be checked for ______.

A	burning
B	leaks
C	rubbing
D	rust

Question 9

Before transporting a sealed load, it is important to check that the:

A	seal is authentic.
B	load is properly secured.
C	seal is secure.
D	placard numbers match the seal numbers.

Question 10

______ can cause a fire.

A	underinflated tires
B	loose fuel connections
C	both loose fuel connections and under inflated tires
D	overinflated tires

Question 11

Your ______ are the most important way to see the sides and rear of your vehicle.

A	rolled down windows
B	mirrors
C	sunglasses
D	rear view cameras

Question 12

When a coolant container is part of a pressurized system, you can:

A	use windshield washer fluid as coolant.
B	use only water in the cooling system.
C	safely remove the radiator cap and add coolant while the engine is hot.
D	check the coolant level of a hot engine.

Question 13

What happens as a person's Blood Alcohol Concentration (BAC) goes up?

A	Muscle control and coordination are affected.
B	All of these things happen.
C	Judgment and self-control are the first to be affected.
D	The drinker's brain is increasingly affected.

Question 14

When driving a slow-moving vehicle on a 2-lane highway, you must pull off at the first safe turnout when the number of vehicles behind you is:

A	none of these.
B	five or more.
C	seven or more.
D	three or more.

Question 15

A trailer is more likely to swing around when the trailer wheels lock up when:

A	the trailer is empty or lightly loaded.
B	the trailer is fully loaded or very heavy.
C	the trailer is being hauled at high speed.
D	the trailer is out of brake adjustment.

Question 16

When driving on a slippery road during the day, how much space should you keep ahead of your truck?

A	The same amount of space you would on a dry road.
B	More space than is needed for ideal driving conditions.
C	The same amount of space you would at night.
D	One vehicle length for every 10,000 lb. of gross vehicle weight.

Question 17

Serious vehicle skids are usually caused by:

A	bad tires.
B	poorly adjusted brakes.
C	driving too slow for road conditions.
D	driving too fast for road conditions.

Question 18

One reason why dry bulk tanks require special care is because:

A	the load should not get wet.
B	a dry bulk tank should only be filled halfway.
C	the load can catch fire easily.
D	the load can shift.

Question 19

You know your brakes are fading when:

A	the brake pedal feels firm when you apply pressure.
B	you have to push harder and harder to get the same stopping power on a downgrade.
C	there is a slight vibration when you press down on the brake pedal.
D	you release pressure on the brake pedal and speed increases.

Question 20

You should make emergency plans when you see a hazard because:

A	you want to have time to act before it turns into an emergency.
B	it is a federal law.
C	you want to have a plan to communicate the risk.
D	you want to avoid doing something all of a sudden.

Question 21

The two driving conditions in which you should downshift are:

A	before starting down a hill and before going up a hill.
B	before starting down a hill and before entering a tunnel.
C	before starting down a hill and before entering a curve.
D	before going up a hill and before entering a curve.

Question 22

If you become sleepy while driving, you should:

A	stop to sleep.
B	slap yourself in the face three times.
C	turn up the radio.
D	roll down the windows.

Question 23

Your stopping distance will increase by ______, if you double your speed.

A	two times
B	three times
C	half
D	four times

Question 24

Two things a driver can do to prevent a rollover are, to go slow around turns, and also:

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 25

Which of the following fires can be safely extinguished by water?

A	Grease fire.
B	Electrical fire.
C	Gasoline fire.
D	None of these fires can be safely extinguished by water.

Question 26

When backing your vehicle, why should you use a helper?

A	To see the blind spots you can't see.
B	To direct traffic away from you.
C	To prevent others from distracting you.
D	To watch for steering errors.

Question 27

When loading cargo, what is an important rule to remember?

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 28

While doing the pre-trip inspection on your vehicle's steering and exhaust system you found the following problems. Which one, if any, should be fixed before you drive the vehicle?

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 29

Any flatbed load must have at least ______ tie downs.

A	three
B	four
C	two
D	one

Question 30

Which of the following is considered a hazard?

A	Road construction zones.
B	All of these are considered a hazard.
C	A stopped transit bus.
D	Pedestrians and bicyclists.

Question 31

Due to its size, if your vehicle cannot make a right turn without swinging into another lane, you should ______ to prevent others from passing you on the right.

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 32

If your vehicle has a retarder, you should turn it off when:

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

Two main things to look for up ahead while driving are ______ and ______.

A	truck stops, gas stations
B	tunnels, overpasses
C	vehicles, traffic signs
D	law enforcement officers, detours

Question 34

Rust around a lug nut is a sign that:

A	the lug nut needs to be replaced.
B	the lug nut is loose.
C	the lug nut is cheap.
D	the wheel needs cleaning.

Question 35

You are operating a new truck with a manual transmission and are about to drive down a long, steep downhill grade? What should you do?

A	Use a higher gear than you would use to climb the hill.
B	Use the same gear you would use to climb the hill.
C	Use a lower gear than you would use to climb the hill.
D	Shift the truck into neutral and coast down the hill to save gas.

Question 36

Empty trucks ______.

A	have the same stopping distance as full trucks
B	have better traction when stopping than full trucks
C	require greater stopping distance than full trucks
D	need less space ahead than full trucks

Question 37

Why should know the outage needed for the liquids you carry?

A	Because some liquids expand more than others when they get warm.
B	Because tank baffles are not always legal with outage.
C	Because some of the heaviest liquids don’t need any.
D	Because it's good to know that information.

Question 38

The two main causes of tire fires are ______ and ______.

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 39

The reason placards are used is:

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 40

The minimum tread depth that front tires should have for safety is:

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 41

How much stopping distance does a light, empty truck require, compared to the same truck fully loaded and heavy?

A	Shorter stopping distance.
B	The same amount of stopping distance.
C	It depends on what mood you are in at the time.
D	Greater stopping distance.

Question 42

The most important reason for conducting a pre-trip inspection of your vehicle is:

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.

Question 43

The trailer hand valve (also called the trolley valve or Johnson bar) should only be used when:

A	testing the trailer brakes after hooking up to a trailer.
B	it is absolutely necessary.
C	there is ice and snow, to prevent skidding.
D	you will be parked for a short time.

Question 44

You are exiting a highway using an offramp that curves downhill and you are driving a heavy vehicle. What should you do?

A	Downshift after you are in the curve.
B	Slow to a safe speed before the curve.
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	Turn on your four-way flashers as you approach the offramp.

Question 45

Containerized loads are:

A	generally used when freight is carried part way by rail or ship.
B	exempt from hazardous materials restrictions.
C	exempt from weight limit restrictions.
D	exempt from height restrictions.

Question 46

The amount of liquid to load into a tank depends on:

A	the legal weight limits.
B	neither of these.
C	the weight of the liquid.
D	both of these.

Question 47

How many red reflective triangles should be in your vehicle's emergency equipment?

A	A minimum of four.
B	A minimum of two.
C	A minimum of three.
D	A minimum of one.

Question 48

The braking power of the spring brakes:

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 49

With regard to safe driving, what does communicating mean?

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 50

The correct term for a long commercial vehicle's tendency to swing wide on turns is:

A	sidetracking.
B	slidetracking.
C	offtracking.
D	fishtailing.

Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results

There are 50 questions to complete.

←

List

→

Return

Shaded items are complete.

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
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"Dude, Go Back to Truck Driving School" because you FAILED!

"A Bad Truck Driver" because you FAILED!

"An Amateur Truck Driver" because you FAILED! "An Amateur Truck Driver!"

"A Good Truck Driver" because you PASSED!

"A Truck Driving Pro" because you PASSED!

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