Massachusetts General Knowledge Practice Test

This is our Massachusetts 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

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

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

Question 2

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 3

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

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

Question 4

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 5

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 6

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

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

Question 7

The braking power of the spring brakes:

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

Question 8

Wheel bearing seals should be checked for ______.

A	rust
B	burning
C	leaks
D	rubbing

Question 9

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

Question 10

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

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

Question 11

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

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

Question 12

Containerized loads are:

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

Question 13

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	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 14

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

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

Question 15

Which of the following is considered a hazard?

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

Question 16

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

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

Question 17

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

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

Question 18

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 19

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

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

Question 20

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 fully loaded or very heavy.
D	the trailer is being hauled at high speed.

Question 21

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

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

Question 22

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

Question 23

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

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

Question 24

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 25

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

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

Question 26

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 27

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

Question 28

Serious vehicle skids are usually caused by:

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

Question 29

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 30

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

A	half
B	three times
C	four times
D	two times

Question 31

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 32

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

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

Question 33

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	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 3 times; push the pedal firmly 5 seconds; the pedal should not move.

Question 34

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 35

Any flatbed load must have at least ______ tie downs.

A	one
B	two
C	four
D	three

Question 36

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

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

Question 37

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 38

If you become sleepy while driving, you should:

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

Question 39

The reason placards are used is:

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

Question 40

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

Question 42

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 43

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 44

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

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

Question 45

Rust around a lug nut is a sign that:

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

Question 46

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 47

Empty trucks ______.

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

Question 48

______ can cause a fire.

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

Question 49

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

Question 50

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

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

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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 main causes of tire fires are ______ and ______.

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

Question 2

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	keep two hands firmly planted on the steering wheel at all times.
D	downshift into the turn.

Question 3

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

Question 4

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

Question 5

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

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

Question 6

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

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

Question 7

Rust around a lug nut is a sign that:

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

Question 8

Any flatbed load must have at least ______ tie downs.

A	three
B	two
C	four
D	one

Question 9

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 10

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 11

Which of the following is considered a hazard?

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

Question 12

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 13

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

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

Question 14

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 a helper when backing up.
D	Using your CB radio or cell phone to inform others.

Question 15

If you become sleepy while driving, you should:

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

Question 16

______ can cause a fire.

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

Question 17

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 18

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

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

Question 19

Wheel bearing seals should be checked for ______.

A	rubbing
B	rust
C	burning
D	leaks

Question 20

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

Question 21

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 22

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

Question 23

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

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

Question 24

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

Question 25

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	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	Pump the brake pedal 5 times; push the pedal firmly 3 seconds; the pedal should not move.

Question 26

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

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

Question 27

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

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

Question 28

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 29

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

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

Question 30

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

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

Question 31

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	check the coolant level of a hot engine.
D	use windshield washer fluid as coolant.

Question 32

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 out of brake adjustment.
D	the trailer is being hauled at high speed.

Question 33

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

Question 34

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 35

The reason placards are used is:

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

Question 36

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

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

Question 37

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

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

Question 38

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 39

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

Question 40

When you are driving at night, you should:

A	keep your high beams on at all times.
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	drink coffee or other caffeine products to help keep you awake.

Question 41

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

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

Question 42

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 43

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 44

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

A	half
B	two times
C	three times
D	four times

Question 45

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 46

The two driving conditions in which you should downshift are:

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

Question 47

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

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

Question 48

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

Question 49

You know your brakes are fading when:

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

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.

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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