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

Rust around a lug nut is a sign that:

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

Question 2

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

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

Question 3

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 4

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

Question 5

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	drink coffee or other caffeine products to help keep you awake.
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 6

______ can cause a fire.

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

Question 7

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

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

Question 8

With regard to safe driving, what does communicating mean?

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

Question 9

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

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

Question 10

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

Question 11

Empty trucks ______.

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

Question 12

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

A	because it is a requirement for all 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	to ensure safety for yourself, your passengers, and other drivers.

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

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 15

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

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

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	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 17

Wheel bearing seals should be checked for ______.

A	leaks
B	rust
C	rubbing
D	burning

Question 18

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

Question 19

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

A	it will be raised slightly when the tractor is backed under it.
B	the kingpin is about 1¼ inches above the fifth wheel.
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 20

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 21

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

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

Question 22

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

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

Question 23

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 24

Which of the following is considered a hazard?

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

Question 25

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

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

Question 26

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

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

Question 27

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 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 28

If you become sleepy while driving, you should:

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

Question 29

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

Question 30

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 31

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

A	Slow to a safe speed before 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	Downshift after you are in the curve.

Question 32

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

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

Question 33

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

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

Question 34

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

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

Question 35

Containerized loads are:

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 36

A pre-trip inspection should be completed:

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

Question 37

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

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

Question 38

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	check the coolant level of a hot engine.
C	use windshield washer fluid as coolant.
D	use only water in the cooling system.

Question 39

The reason placards are used is:

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

Question 40

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 41

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

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 42

You know your brakes are fading when:

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

Question 43

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

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

Question 44

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	It depends on what mood you are in at the time.
C	Shorter stopping distance.
D	Greater stopping distance.

Question 45

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

A	four times
B	half
C	two times
D	three times

Question 46

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

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

Question 47

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

Question 48

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	Warn other drivers by using your left turn signal lights.
C	Keep your low beam lights on.
D	Turn on your 4-way emergency flashers to warn other drivers.

Question 49

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

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

Question 50

Any flatbed load must have at least ______ tie downs.

A	one
B	four
C	three
D	two

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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

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

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

Question 2

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 as you complete the turn
C	turn wide before you start the turn
D	turn right and drive over the curb

Question 3

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 4

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	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 5

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

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

Question 6

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 7

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

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

Question 8

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

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 9

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	three or more.
D	seven or more.

Question 10

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	Pump the brake pedal 3 times; push the pedal firmly 5 seconds; the pedal should not move.
D	Move forward slowly and push firmly on the brake pedal.

Question 11

Any flatbed load must have at least ______ tie downs.

A	two
B	four
C	three
D	one

Question 12

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

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

Question 13

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	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	the brake pedal feels firm when you apply pressure.

Question 14

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

A	two times
B	three times
C	half
D	four times

Question 15

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	One vehicle length for every 10,000 lb. of gross vehicle weight.
D	More space than is needed for ideal driving conditions.

Question 16

______ can cause a fire.

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

Question 17

Wheel bearing seals should be checked for ______.

A	rust
B	leaks
C	rubbing
D	burning

Question 18

With regard to safe driving, what does communicating mean?

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

Question 19

Which of the following is considered a hazard?

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

Question 20

A pre-trip inspection should be completed:

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

Question 21

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

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

Question 22

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

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

Question 23

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

Question 24

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

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

Question 25

The braking power of the spring brakes:

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

Question 26

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

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

Question 27

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 28

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

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 29

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 at waist level.
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 even with the top of the fifth wheel.

Question 30

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	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	Too many vertical stacks.

Question 31

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	because it is a requirement for all drivers.
C	to ensure safety for yourself, your passengers, and other drivers.
D	to help ensure the vehicle will make it to your destination.

Question 32

Empty trucks ______.

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

Question 33

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.

Question 34

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

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

Question 35

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

Question 36

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	make sure you are driving slow enough so you can stop within the range of your headlights in case of an emergency.
D	roll down your window so that the fresh air will help keep you awake.

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

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

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

Question 39

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	it is absolutely necessary.
D	there is ice and snow, to prevent skidding.

Question 40

Serious vehicle skids are usually caused by:

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

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

Question 42

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

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

Question 43

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 cargo weight evenly over all the axles.
D	Load more weight over the drive axle for better traction.

Question 44

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

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

Question 45

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 cheap.
D	the lug nut is loose.

Question 46

If you become sleepy while driving, you should:

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

Question 47

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

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

Question 48

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	All of these things happen.
D	Judgment and self-control are the first to be affected.

Question 49

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

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 50

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

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

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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