Louisiana General Knowledge Practice Test

This is our Louisiana 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

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 hand signals.
D	Using a helper when backing up.

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	keep two hands firmly planted on the steering wheel at all times.
C	downshift into the turn.
D	check to make sure that the brakes are properly balanced.

Question 3

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

Question 4

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

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

Question 5

If you become sleepy while driving, you should:

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

Question 6

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

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

Question 7

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

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

Question 8

______ can cause a fire.

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

Question 9

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

Question 10

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

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

Question 11

Rust around a lug nut is a sign that:

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

Question 12

A pre-trip inspection should be completed:

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

Question 13

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 at night.
D	The same amount of space you would on a dry road.

Question 14

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

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

Question 15

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	there is ice and snow, to prevent skidding.
C	you will be parked for a short time.
D	it is absolutely necessary.

Question 16

Any flatbed load must have at least ______ tie downs.

A	one
B	four
C	three
D	two

Question 17

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 18

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

A	four times
B	half
C	three times
D	two times

Question 19

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

Question 20

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

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

Question 21

Containerized loads are:

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

Question 22

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 23

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 24

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

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

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

Question 26

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

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

Question 27

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	Nothing, because the posted speed limit for the offramp is usually 10 miles per hour below the safe speed limit for the offramp.
C	Downshift after you are in the curve.
D	Slow to a safe speed before the curve.

Question 28

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

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

Question 29

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

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

Question 30

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

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

Question 31

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

Question 32

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

Question 33

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

Question 34

Which of the following is considered a hazard?

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

Question 35

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

Question 36

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 37

Serious vehicle skids are usually caused by:

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

Question 38

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

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

Question 39

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	the load can shift.
D	a dry bulk tank should only be filled halfway.

Question 40

You know your brakes are fading when:

A	you release pressure on the brake pedal and speed increases.
B	the brake pedal feels firm when you apply pressure.
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 41

The reason placards are used is:

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

Question 42

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 43

When you are driving at night, you should:

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

Question 44

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

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

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	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 46

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

Question 47

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

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

Question 48

Wheel bearing seals should be checked for ______.

A	rubbing
B	burning
C	leaks
D	rust

Question 49

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	you are driving on the freeway.
D	the road is wet, icy, or snow covered.

Question 50

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

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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

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

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

Question 2

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	Perception distance, response distance, and reaction distance.
D	Observation distance, reaction distance, and slowing distance.

Question 3

A pre-trip inspection should be completed:

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

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

Question 5

Wheel bearing seals should be checked for ______.

A	burning
B	rust
C	leaks
D	rubbing

Question 6

Containerized loads are:

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

Question 7

Rust around a lug nut is a sign that:

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

Question 8

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	there is ice and snow, to prevent skidding.
C	you will be parked for a short time.
D	it is absolutely necessary.

Question 9

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

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

Question 10

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

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

Question 11

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

Question 12

The reason placards are used is:

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

Question 13

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 14

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

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

Question 15

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	Play in the steering wheel of more than five degrees.
C	Too many vertical stacks.
D	Oil on the tie rod.

Question 16

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

Question 17

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

Question 18

When you are driving at night, you should:

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

Question 19

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 20

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 21

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 22

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 23

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 24

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

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

Question 25

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 being hauled at high speed.
C	the trailer is empty or lightly loaded.
D	the trailer is out of brake adjustment.

Question 26

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 27

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

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

Question 28

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 29

Any flatbed load must have at least ______ tie downs.

A	four
B	two
C	one
D	three

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

Question 31

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 32

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

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

Question 33

Serious vehicle skids are usually caused by:

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

Question 34

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 35

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 36

______ can cause a fire.

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

Question 37

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	keep two hands firmly planted on the steering wheel at all times.
C	downshift into the turn.
D	check to make sure that the brakes are properly balanced.

Question 38

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 39

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

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

Question 41

Which of the following is considered a hazard?

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

Question 42

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

Question 43

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 44

You know your brakes are fading when:

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

Question 45

If you become sleepy while driving, you should:

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

Question 46

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

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

Question 47

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 four.
D	A minimum of one.

Question 48

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

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

Question 49

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 50

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

A	half
B	four times
C	two times
D	three times

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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