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Louisiana
Louisiana CDL Knowledge Test Class B 2
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Q.1
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When backing a truck, you should:
Only use the side mirrors on the driver’s side.
Use both side mirrors.
Never use a helper.
Q.2
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If there is ice on the front of your side mirror:
You should exit the roadway.
You can expect ice to be on the roadway.
There will not be ice on the roadway.
Q.3
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If the low air pressure warning signal comes on, you should:
Continue driving, but have the brakes repaired within a week.
Pull over and inspect the brakes.
Phone a mechanic while driving.
Q.4
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If you have an engine fire, you should:
Open the hood as soon as possible.
Turn off the engine as soon as possible.
Not use a fire extinguisher.
Q.5
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What color malfunction lamps do vehicles equipped with ABS have?
Green
Yellow
Blue
Q.6
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If you are being tailgated while driving a large vehicle, do all of the following, except:
Reduce your speed gradually.
Increase your following distance.
Increase your speed.
Q.7
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If a driver has stopped on the road and is placing triangles to warn other motorists:
The triangles should be held between the driver and oncoming traffic.
The triangles should be carried behind the driver's back to prevent them from being seen by other drivers until they are placed.
The triangles should be held as low as possible.
Q.8
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During the vehicle inspection test, you will be asked to:
Change a tire.
Explain to the examiner what you are inspecting and why.
Estimate the weight of a load on a trailer.
Q.9
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When driving in fog, you should:
Slow down.
Speed up.
Drive on the shoulder.
Q.10
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A person driving with an open window in cold weather may be:
A distracted driver.
A person who is dressed inappropriately.
A person who likes fresh air.
Q.11
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If your vehicle is hydroplaning, you should:
Turn the steering wheel as hard as possible.
Not use the brakes.
Put the vehicle in reverse.
Q.12
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The steering wheel should be:
Held with both hands.
Held with one hand to keep the other hand free.
Held with one hand at a time, alternating between hands.
Q.13
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Skids happen when:
Tires lose their grip on the road.
There is too much weight in the trailer.
ABS kicks in.
Q.14
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Before attempting to put out an engine fire:
The hood should be opened.
The engine should be turned off.
The accelerator should be depressed to use up the remaining fuel.
Q.15
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When backing with a trailer, turning toward the driver’s side is encouraged because:
The driver will have the best possible view.
Power lines should be on the passenger's side.
Other drivers can offer assistance on the passenger's side.
Q.16
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Blocking a load:
Is dangerous and should never be done.
Is essential to preventing cargo from moving in transit.
Is only done with liquid loads.
Q.17
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What is Gross Combination Weight?
The total weight of the powered unit, trailer, and cargo
The total weight of a single vehicle without its load
The maximum weight allowed by the manufacturer
Q.18
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You should always be able to stop within:
10 feet of your vehicle.
100 feet of your vehicle.
Your view of the road ahead.
Q.19
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You should not use your mirrors:
When changing lanes.
When making a turn.
To determine how fast you are traveling.
Q.20
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Drivers talking to passengers in their vehicle should be viewed as:
Responsible drivers.
Distracted drivers.
Knowledgeable drivers.
Q.21
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If mirrors are dirty before starting a trip:
They will likely become clean after driving a short distance.
It should not be a concern.
They should be cleaned before the vehicle is driven.
Q.22
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In a vehicle with dual parking control valves, a separate air tank can be used:
To make the air brakes work more effectively.
To temporarily release the spring brakes.
To charge the brakes on the rear trailer.
Q.23
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Rough acceleration:
Can damage parts of a vehicle.
Is necessary to warm up parts of a vehicle.
Is encouraged to improve a vehicle's gas mileage.
Q.24
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Cargo inside a trailer:
Does not need to be secured.
Should be stacked no more than three feet high.
Should be secured to prevent movement.
Q.25
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Who is responsible for the safe operation of a vehicle?
The driver
The mechanic
The owner
Q.26
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During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?
3 psi in one minute.
6 psi in one minute.
8 psi in one minute.
Q.27
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The radiator cap:
Should not be removed when the coolant is hot.
Can be removed when the coolant is hot.
Should be cool to the touch under normal driving conditions.
Q.28
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If confronted by an aggressive driver, you should:
Make eye contact to better communicate with them.
Ignore their gestures.
Not move out of their path of travel.
Q.29
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If a vehicle begins to hydroplane, the driver should:
Accelerate.
Release the accelerator and push in the clutch.
Pull in the clutch and brake.
Q.30
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Using the brakes creates heat. If too much heat is produced:
The brakes may not work.
The brakes may squeak more than usual.
The brakes will brake unevenly.
Q.31
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A pre-trip inspection:
Should be done in the same way every time.
Should be done differently every time.
Does not always need to include all items of concern.
Q.32
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If you are braking on dry pavement while traveling at 55 mph, how much distance will brake lag add to your overall stopping distance?
32 feet
45 feet
20 feet
Q.33
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While driving a vehicle, if an unusual noise or feeling occurs, the driver should:
Assume it is not a concern and continue driving.
Hope the vehicle makes it until it is switched to another driver.
Check out the situation to determine the proper solutions.
Q.34
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Before driving a power steering-equipped vehicle, you should make sure that:
The fluid is at a proper level.
The hoses are connected to the battery.
Any leak is small.
Q.35
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When trying to put out an electrical fire, you should:
Use water.
Use a B:C extinguisher.
Use an X extinguisher.
Q.36
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An alcohol evaporator in an air brake system:
Makes the brakes work without squeaking.
Prevents ice from forming in the braking system.
Lubricates parts of the braking system.
Q.37
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A bridge formula:
Permits less weight per axle for axles that are close together.
Permits more weight for trucks.
Is not a concern for drivers.
Q.38
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If a vehicle is carrying hazardous cargo, placards must be placed:
Only on the front of the vehicle.
On the front, rear, and sides of the vehicle.
Only on the driver’s side of the vehicle.
Q.39
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When loading a trailer, it is important to:
Place as little weight as possible over the axles.
Place an appropriate amount of weight over the axles.
Not be concerned with how the cargo's weight is distributed.
Q.40
Submit
When starting an engine, oil pressure should come up to a normal level:
Within seconds.
Within five minutes.
After about three minutes.
Q.41
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If you plan to transport hazardous materials, you will:
Need to obtain a hazardous materials endorsement.
Need to drive while using flashing lights.
Need to wear a gas mask.
Q.42
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When exiting a vehicle, it is important to maintain ____ with your vehicle at all times.
Three points of contact
Four points of contact
Two points of contact
Q.43
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Alcohol evaporators are:
Illegal.
Used to introduce alcohol into air brake systems.
Only allowed in the northern parts of the state.
Q.44
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What is the Gross Vehicle Weight Rating (GVWR)?
The weight stated by the manufacturer as the loaded weight of a single vehicle
The maximum weight that can be pulled by a vehicle
The minimum weight that can be hauled by a vehicle
Q.45
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To avoid a collision with a hazard on the roadway:
You should always try to stop.
Swerving may be a safer option than stopping.
You should never swerve.
Q.46
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What is the number one cause of death and injury in a work zone?
Drivers speeding
Slow drivers
Animals crossing the road
Q.47
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What is a drawback of retarders?
They may not be permitted everywhere.
They can help to slow a vehicle.
They cannot be turned off.
Q.48
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When starting a vehicle, the oil pressure should:
Gradually build up pressure over the span of a few minutes.
Come up to normal within a few seconds.
Start high, then decrease as the engine is run.
Q.49
Submit
If feeling drowsy while driving, you should:
Press on and finish the trip.
Drive faster to reach your destination more quickly.
Safely leave the road and take a nap.
Q.50
Submit
When loading a trailer, the heaviest cargo should be placed:
On top of the lightest parts of the cargo.
Under the lightest parts of the cargo.
At the rear of the trailer.
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