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

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

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

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

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	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	Slow to a safe speed before the curve.
D	Turn on your four-way flashers as you approach the offramp.

Question 3

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

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

Question 4

The braking power of the spring brakes:

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

Question 5

A pre-trip inspection should be completed:

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

Question 6

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

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

Question 7

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

Question 8

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

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

Question 9

Containerized loads are:

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

Question 10

You know your brakes are fading when:

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

Question 11

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

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

Question 12

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

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

Question 13

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 14

The reason placards are used is:

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

Question 15

When you are driving at night, you should:

A	drink coffee or other caffeine products to help keep you awake.
B	roll down your window so that the fresh air will help keep you awake.
C	make sure you are driving slow enough so you can stop within the range of your headlights in case of an emergency.
D	keep your high beams on at all times.

Question 16

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	a dry bulk tank should only be filled halfway.
D	the load can shift.

Question 17

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 out of brake adjustment.
D	the trailer is fully loaded or very heavy.

Question 18

Which of the following is considered a hazard?

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

Question 19

Rust around a lug nut is a sign that:

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 20

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 21

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	you will be parked for a short time.
C	there is ice and snow, to prevent skidding.
D	it is absolutely necessary.

Question 22

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

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

Question 23

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

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

Question 24

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

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

Question 25

Empty trucks ______.

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

Question 26

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

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

Question 27

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

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 28

If you become sleepy while driving, you should:

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

Question 29

Any flatbed load must have at least ______ tie downs.

A	two
B	one
C	four
D	three

Question 30

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 the same gear you would use to climb the hill.
B	Use a higher gear than 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 31

Wheel bearing seals should be checked for ______.

A	leaks
B	burning
C	rubbing
D	rust

Question 32

Serious vehicle skids are usually caused by:

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

Question 33

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

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 34

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

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

Question 35

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

A	three times
B	two times
C	four times
D	half

Question 36

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

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 37

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

Question 38

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 ten degrees (two inches on a 20-inch steering wheel).
D	Play in the steering wheel of more than five degrees.

Question 39

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

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

Question 40

With regard to safe driving, what does communicating mean?

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 41

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

Question 42

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

Question 43

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

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

Question 44

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	downshift into the turn.
C	keep the cargo as close to the ground as possible.
D	keep two hands firmly planted on the steering wheel at all times.

Question 45

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

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 46

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

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

Question 47

______ can cause a fire.

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

Question 48

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 it is a requirement for all drivers.
C	because law enforcement may inspect your vehicle on the road.
D	to help ensure the vehicle will make it to your destination.

Question 49

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

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

Question 50

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

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

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

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"A Good Truck Driver" because you PASSED! A Good Truck Driver!

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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

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

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

Question 2

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

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

Question 3

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

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

Question 4

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

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 5

You know your brakes are fading when:

A	you have to push harder and harder to get the same stopping power on a downgrade.
B	the brake pedal feels firm when you apply pressure.
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 6

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

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

Question 7

Wheel bearing seals should be checked for ______.

A	leaks
B	rust
C	burning
D	rubbing

Question 8

The braking power of the spring brakes:

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

Question 9

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

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 10

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

A	four times
B	two times
C	half
D	three times

Question 11

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

A	Pump the brake pedal 5 times; push the pedal firmly 3 seconds; the pedal should not move.
B	Push the brake pedal firmly 5 seconds; listen for leaks.
C	Move forward slowly and push firmly on the brake pedal.
D	Pump the brake pedal 3 times; push the pedal firmly 5 seconds; the pedal should not move.

Question 12

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 13

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 14

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

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

Question 15

When you are driving at night, you should:

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 16

If you become sleepy while driving, you should:

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

Question 17

______ can cause a fire.

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

Question 18

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

Question 19

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

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 20

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

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

Question 21

A pre-trip inspection should be completed:

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

Question 22

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	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 23

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

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

Question 24

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

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

Question 25

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 26

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

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 27

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

Question 28

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 the same gear you would use to climb the hill.
B	Use a higher 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 lower gear than you would use to climb the hill.

Question 29

Any flatbed load must have at least ______ tie downs.

A	four
B	two
C	three
D	one

Question 30

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

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

Question 31

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

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

Question 32

Containerized loads are:

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 33

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

Question 34

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	three or more.
C	seven or more.
D	five or more.

Question 35

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	testing the trailer brakes after hooking up to a trailer.
C	there is ice and snow, to prevent skidding.
D	it is absolutely necessary.

Question 36

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	Keep your low beam lights on.
D	Put your warning devices out within 15 minutes.

Question 37

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	check to make sure that the brakes are properly balanced.
C	downshift into the turn.
D	keep the cargo as close to the ground as possible.

Question 38

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

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

Question 39

Empty trucks ______.

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 40

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 41

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

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	Downshift after you are in the curve.
D	Turn on your four-way flashers as you approach the offramp.

Question 42

Serious vehicle skids are usually caused by:

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

Question 43

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 44

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

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

Question 45

The two driving conditions in which you should downshift are:

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

Question 46

The reason placards are used is:

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

Question 47

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 48

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 toward the rear of the truck for easier unloading.
C	Load more weight over the drive axle for better traction.
D	Load cargo weight evenly over all the axles.

Question 49

Rust around a lug nut is a sign that:

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

Question 50

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

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

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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