Delaware General Knowledge Practice Test

This is our Delaware 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 many red reflective triangles should be in your vehicle's emergency equipment?

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

Question 2

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 3

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

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

Question 4

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

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

Question 5

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 6

Containerized loads are:

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

Question 7

The braking power of the spring brakes:

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 8

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

Question 9

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	Keep your low beam lights on.
C	Put your warning devices out within 15 minutes.
D	Turn on your 4-way emergency flashers to warn other drivers.

Question 10

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	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	Downshift after you are in the curve.

Question 11

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 liquids expand more than others when they get warm.
D	Because some of the heaviest liquids don’t need any.

Question 12

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

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

Question 13

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	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 14

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 15

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

A	use only water in the cooling system.
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 windshield washer fluid as coolant.

Question 16

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

Question 17

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 toward the rear of the truck for easier unloading.
D	Load cargo weight evenly over all the axles.

Question 18

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

Question 19

Which of the following is considered a hazard?

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

Question 20

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	it is a federal law.
D	you want to have time to act before it turns into an emergency.

Question 21

Serious vehicle skids are usually caused by:

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

Question 22

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 23

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 24

Wheel bearing seals should be checked for ______.

A	burning
B	rubbing
C	rust
D	leaks

Question 25

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	over-heated brakes, under-inflated tires
D	poor-quality retreads, under-inflated tires

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

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

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

Question 28

When you are driving at night, you should:

A	roll down your window so that the fresh air will help keep you awake.
B	keep your high beams on at all times.
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 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	seven or more.
B	five or more.
C	none of these.
D	three or more.

Question 30

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

Question 31

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 32

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 33

Rust around a lug nut is a sign that:

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

Question 34

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

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

Question 35

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

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

Question 36

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 37

Any flatbed load must have at least ______ tie downs.

A	three
B	two
C	four
D	one

Question 38

______ can cause a fire.

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

Question 39

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 40

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	you release pressure on the brake pedal and speed increases.
D	there is a slight vibration when you press down on the brake pedal.

Question 41

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 42

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

A	four times
B	half
C	three times
D	two times

Question 43

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

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

Question 44

With regard to safe driving, what does communicating mean?

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

Question 45

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

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

Question 46

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

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

Question 47

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 48

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

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

Question 49

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 should not get wet.
D	the load can shift.

Question 50

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

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

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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

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

Question 2

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

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

Question 3

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, response distance, and reaction distance.
D	Perception distance, reaction distance, and braking distance.

Question 4

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

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

Question 5

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	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 6

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 7

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 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 8

Wheel bearing seals should be checked for ______.

A	burning
B	rubbing
C	leaks
D	rust

Question 9

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

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

Question 10

______ can cause a fire.

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

Question 11

With regard to safe driving, what does communicating mean?

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

Question 12

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

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

Question 13

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 14

The braking power of the spring brakes:

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

Question 15

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 16

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 toward the rear of the truck for easier unloading.
D	Load cargo weight evenly over all the axles.

Question 17

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

A	two times
B	half
C	four times
D	three times

Question 18

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

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

Question 19

Containerized loads are:

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

Question 20

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

Question 21

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

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

Question 22

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 23

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 24

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

Question 25

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

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

Question 26

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 lower gear than 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 the same gear you would use to climb the hill.

Question 27

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 28

The reason placards are used is:

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

Question 29

Rust around a lug nut is a sign that:

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

Question 30

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

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

Question 31

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

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

Question 32

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

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

Question 33

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 34

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

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

Question 35

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

Question 36

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	before operating the vehicle.
D	whenever you stop to refuel.

Question 37

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 38

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

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

Question 39

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

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

Question 40

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

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

Question 41

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	Turn on your 4-way emergency flashers to warn other drivers.
D	Keep your low beam lights on.

Question 42

Empty trucks ______.

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

Question 43

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 end of the kingpin is at waist level.
D	the kingpin is about 1¼ inches above the fifth wheel.

Question 44

Which of the following is considered a hazard?

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

Question 45

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 46

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

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

Question 47

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 48

Any flatbed load must have at least ______ tie downs.

A	one
B	three
C	two
D	four

Question 49

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

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

Question 50

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

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

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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