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

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Congratulations! You have completed the General Knowledge CDL Practice Quiz. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

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 one.
D	A minimum of three.

Question 2

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

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

Question 3

The braking power of the spring brakes:

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

Question 4

______ can cause a fire.

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

Question 5

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

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

Question 6

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 7

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

Question 8

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

Question 10

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	downshift into the turn.
D	check to make sure that the brakes are properly balanced.

Question 11

Which of the following is considered a hazard?

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

Question 12

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	Shorter stopping distance.
C	The same amount of stopping distance.
D	Greater stopping distance.

Question 13

Any flatbed load must have at least ______ tie downs.

A	three
B	one
C	two
D	four

Question 14

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 15

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 it's good to know that information.
D	Because some of the heaviest liquids don’t need any.

Question 16

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

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

Question 17

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	five or more.
D	seven or more.

Question 18

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 19

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

Question 20

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

A	three times
B	half
C	two times
D	four times

Question 21

Empty trucks ______.

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

Question 22

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 23

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 24

When you are driving at night, you should:

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

Question 25

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 26

The two driving conditions in which you should downshift are:

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

Question 27

Rust around a lug nut is a sign that:

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

Question 28

Containerized loads are:

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

Question 29

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 30

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

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

Question 31

Wheel bearing seals should be checked for ______.

A	rubbing
B	burning
C	leaks
D	rust

Question 32

A pre-trip inspection should be completed:

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

Question 33

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 the same gear 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 34

If you become sleepy while driving, you should:

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

Question 35

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

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

Question 36

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

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

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

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

Question 39

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

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

Question 40

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

Question 41

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 time to act before it turns into an emergency.
D	you want to have a plan to communicate the risk.

Question 42

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 43

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 44

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

Question 45

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

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

Question 46

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 hand signals.
D	Using a helper when backing up.

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

Question 48

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 49

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

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

Question 50

The reason placards are used is:

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

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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

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Congratulations! You have completed the General Knowledge CDL Practice Test. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

The two driving conditions in which you should downshift are:

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

Question 2

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

A	half
B	four times
C	three times
D	two times

Question 3

Which of the following is considered a hazard?

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

Question 4

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 5

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 6

With regard to safe driving, what does communicating mean?

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

Question 7

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	check the coolant level of a hot engine.
D	safely remove the radiator cap and add coolant while the engine is hot.

Question 8

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 9

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 10

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 11

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	it is absolutely necessary.
C	testing the trailer brakes after hooking up to a trailer.
D	you will be parked for a short time.

Question 12

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	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	Slow to a safe speed before the curve.

Question 13

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 ensure safety for yourself, your passengers, and other 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 14

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

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

Question 15

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

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

Question 16

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

Question 17

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 18

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	Put your warning devices out within 15 minutes.
D	Warn other drivers by using your left turn signal lights.

Question 19

Containerized loads are:

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

Question 20

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

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

Question 21

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

Question 22

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 23

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

Question 24

The reason placards are used is:

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

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

Question 26

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

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

Question 27

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 28

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	Shorter stopping distance.
C	Greater stopping distance.
D	The same amount of stopping distance.

Question 29

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	keep your high beams on at all times.
C	roll down your window so that the fresh air will help keep you awake.
D	drink coffee or other caffeine products to help keep you awake.

Question 30

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 31

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	3/32-inch in every major groove.
D	2/32-inch in every major groove.

Question 32

______ can cause a fire.

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

Question 33

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	Gasoline fire.
D	Electrical fire.

Question 34

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 the same gear 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 35

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

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

Question 36

Serious vehicle skids are usually caused by:

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

Question 37

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	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	the brake pedal feels firm when you apply pressure.

Question 38

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

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

Question 39

Empty trucks ______.

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

Question 40

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

Question 41

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 42

A pre-trip inspection should be completed:

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

Question 43

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 44

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 45

Any flatbed load must have at least ______ tie downs.

A	three
B	four
C	one
D	two

Question 46

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 47

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	depends on the service brakes being in adjustment.
D	decreases when the service breaks are hot.

Question 48

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

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

Question 49

Wheel bearing seals should be checked for ______.

A	leaks
B	rubbing
C	burning
D	rust

Question 50

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

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

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.

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41	42	43	44	45
46	47	48	49	50
End

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
26	27	28	29	30
31	32	33	34	35
36	37	38	39	40
41	42	43	44	45
46	47	48	49	50
End

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
26	27	28	29	30
31	32	33	34	35
36	37	38	39	40
41	42	43	44	45
46	47	48	49	50
End

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
26	27	28	29	30
31	32	33	34	35
36	37	38	39	40
41	42	43	44	45
46	47	48	49	50
End

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
26	27	28	29	30
31	32	33	34	35
36	37	38	39	40
41	42	43	44	45
46	47	48	49	50
End