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

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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

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

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

Question 2

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

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

Question 3

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	over-heated brakes, under-inflated tires
D	dual tires that touch, hot road surfaces

Question 4

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	road conditions are excellent.
D	the road is wet, icy, or snow covered.

Question 5

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	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 kingpin is about 1¼ inches above the fifth wheel.

Question 6

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

Question 7

A pre-trip inspection should be completed:

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

Question 8

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

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

Question 9

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 10

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

Question 11

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

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

Question 12

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 13

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

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

Question 14

______ can cause a fire.

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

Question 15

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 16

With regard to safe driving, what does communicating mean?

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

Question 17

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	One vehicle length for every 10,000 lb. of gross vehicle weight.
C	The same amount of space you would on a dry road.
D	The same amount of space you would at night.

Question 18

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

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

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

Serious vehicle skids are usually caused by:

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

Question 21

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

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

Question 22

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

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

Question 23

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

Question 24

Which of the following is considered a hazard?

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

Question 25

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

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

Question 26

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

A	half
B	two times
C	three times
D	four times

Question 27

You know your brakes are fading when:

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

Question 28

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

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

Question 29

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.

Question 30

If you become sleepy while driving, you should:

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

Question 31

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

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

Question 32

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 33

Empty trucks ______.

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

Question 34

Wheel bearing seals should be checked for ______.

A	burning
B	rubbing
C	leaks
D	rust

Question 35

Any flatbed load must have at least ______ tie downs.

A	three
B	two
C	one
D	four

Question 36

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 hazardous materials restrictions.
D	exempt from height restrictions.

Question 37

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 38

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

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

Question 39

When you are driving at night, you should:

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

Question 40

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

Question 41

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

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

Question 42

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 two.
D	A minimum of one.

Question 43

The braking power of the spring brakes:

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

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

Question 46

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

Question 47

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

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

Question 48

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

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

Question 49

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 have time to act before it turns into an emergency.
D	you want to avoid doing something all of a sudden.

Question 50

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

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

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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

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

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

Question 2

The braking power of the spring brakes:

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

Question 3

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 4

Wheel bearing seals should be checked for ______.

A	rust
B	leaks
C	burning
D	rubbing

Question 5

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

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

Question 6

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

Question 7

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

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

Question 8

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

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

Question 9

The two driving conditions in which you should downshift are:

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

Question 10

______ can cause a fire.

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

Question 11

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

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

Question 12

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

A	half
B	four times
C	two times
D	three times

Question 13

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	Pump the brake pedal 3 times; push the pedal firmly 5 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 14

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 15

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 16

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

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

Question 17

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 18

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

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

Question 19

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 20

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

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

Question 21

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

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

Question 22

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 23

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 24

Empty trucks ______.

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

Question 25

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

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

Question 26

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 27

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

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

Question 28

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	One vehicle length for every 10,000 lb. of gross vehicle weight.
C	The same amount of space you would on a dry road.
D	The same amount of space you would at night.

Question 29

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

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

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 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 31

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

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

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 34

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

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

Question 35

With regard to safe driving, what does communicating mean?

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

Question 36

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

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

Question 37

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 38

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 39

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 40

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

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

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

Question 42

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 43

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 44

Any flatbed load must have at least ______ tie downs.

A	three
B	two
C	one
D	four

Question 45

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	make sure you are driving slow enough so you can stop within the range of your headlights in case of an emergency.
D	drink coffee or other caffeine products to help keep you awake.

Question 46

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 47

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

Question 48

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

Question 49

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

A	keep the cargo as close to the ground as possible.
B	downshift into the turn.
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 50

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

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

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.

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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

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