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Louisiana
Louisiana CDL Knowledge Test Class B 1
Answers
Q.1.
When adjusting your mirrors before a trip:
No part of your vehicle should be visible in any mirror.
Part of your vehicle should be visible in the mirrors.
More than half of each mirror should show the vehicle.
Q.2.
Air tank drains should:
Only be used by mechanics.
Only be used when it is wet outside.
Be used to drain the tanks completely.
Q.3.
Items on a flatbed:
Are usually heavy enough to not need to be strapped down.
Should not be strapped down if you are driving more slowly than 35 mph.
Must always be secured.
Q.4.
A tread depth of ____ should be in every major groove of a front tire.
1/32 of an inch
2/32 of an inch
4/32 of an inch
Q.5.
How soon after starting a trip must cargo securement be checked?
After 50 miles
After 100 miles
After 250 miles
Q.6.
The two markings on a front brake limiting valve usually read:
"Normal" and "slippery."
"Low" and "high."
"Left" and "right."
Q.7.
Stopping distance can be affected by:
Driving speed.
Temperature.
Time of day.
Q.8.
While driving, a driver should:
Not be concerned with what is happening on the sides of their vehicle.
Be concerned with what is happening on all sides of the vehicle.
Not be concerned with what is happening behind the vehicle.
Q.9.
When starting the engine of a truck with a trailer, you can tell that your vehicle's ABS is not working if:
The yellow light on the left rear of the trailer stays on.
The red light on the right side of the trailer flashes three times.
All the rear lights flash and then turn off.
Q.10.
When inspecting your tires, you do not want to find:
Tire tread that is 4/32 of an inch deep.
Valve stems without damage.
Mismatched tire sizes.
Q.11.
When checking your tires as part of the pre-trip inspection, you should look at the:
Tire pressure.
Tire color.
Tire manufacturer.
Q.12.
The parking brake in a newer vehicle is applied by:
Moving a lever to the right.
Pushing a yellow, diamond-shaped knob.
Pulling a yellow, diamond-shaped knob.
Q.13.
Cargo with a high center of gravity:
Can make a vehicle likely to tip over.
Is encouraged in inclement weather.
Is required on some roads.
Q.14.
If your brakes fail while you are traveling downhill and there is no available escape ramp, you should:
Keep pumping the brakes.
Turn the vehicle off.
Drive into an open field.
Q.15.
Wheels with welding repairs are:
Safe to be used if the repairs were done by a professional.
Safe to be used if the repair seems solid.
Not safe to be used.
Q.16.
The leakage rate for a single vehicle with air brakes should be no more than ____ in one minute during a static leakage test.
1 psi
2 psi
3 psi
Q.17.
During an applied leakage test, what is the maximum leakage rate that is safe for a single vehicle with air brakes?
10 psi in one minute
5 psi in one minute
3 psi in one minute
Q.18.
When traveling long distances, you should:
Take rest breaks.
Drive as fast as possible.
Drive through the night.
Q.19.
You should check and adjust your mirrors:
Before driving.
While driving.
After driving.
Q.20.
Pre-trip inspections:
Should never be done the same way two times in a row.
Should always be done in the same order.
Do not need to be done if the driver is familiar with the vehicle.
Q.21.
If an unusual noise or feeling occurs in a vehicle while it is being driven, the driver should:
Assume it is not a concern and continue driving.
Hope the vehicle does alright until it is switched to another driver.
Check the situation to determine the proper solution.
Q.22.
If using a helper when backing a vehicle, the helper should be located:
In front of the passenger's side of the vehicle.
In front of the driver's side of the vehicle.
Near the back of the truck.
Q.23.
Distracted driving can be avoided by:
Pre-programming radio stations.
Smoking while driving.
Eating while driving.
Q.24.
If a vehicle has a vehicle inspection report from the previous driver:
The driver should not conduct a pre-trip inspection and rely on the report.
The driver should take the vehicle to a mechanic.
The driver should review the report.
The driver should speak with the previous driver.
Q.25.
Having weight loaded in a way that creates a high center of gravity:
Increases the likelihood of a rollover.
Increases the likelihood that items will fall down.
Increases the difficulty of unloading the cargo.
Q.26.
To avoid a hazard:
You should always steer to the left.
You may be able to drive onto the shoulder.
You should steer sharply in one direction.
Q.27.
Water that has collected on a roadway can cause:
Hydroplaning.
Acceleration.
Stopping.
Q.28.
If a worker is present in a work zone, you should:
Continue driving at the posted speed limit.
Slow to a speed under the posted speed limit.
Drive in the grass.
Q.29.
During the basic control skills test, you will receive points if you:
Pull up once.
Check your positioning.
Cross over exercise boundaries.
Q.30.
A poor balance of weight in a trailer:
Can make handling unsafe.
Improves traction.
Increases fuel efficiency.
Q.31.
When exiting a vehicle, a driver should:
Hop directly from their seat to the ground.
Maintain at least one point of contact with their vehicle.
Be turned to face their vehicle.
Q.32.
A cargo van is:
Usually the same height with or without a load.
Usually taller with a heavy load than with a light load.
Usually shorter with a heavy load than with a light load.
Q.33.
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.34.
Mirror adjustment can only be checked properly if:
The trailer is straight.
There is no trailer.
The vehicle is on a slight incline.
Q.35.
If you must back up, it is helpful to:
Drive as fast as possible to complete the maneuver quickly.
First walk the line of travel to look for obstacles.
Use only the passenger side mirror.
Q.36.
The only way to sober up after consuming alcohol is to:
Take a cold shower.
Exercise.
Wait.
Q.37.
If a speed limit is posted, the posted speed:
Should never be exceeded.
May be exceeded if passing another vehicle.
May be exceeded if driving in a rural area.
Q.38.
Air tank drains should:
Not be used by the driver.
Only be used when it is wet outside.
Be used to drain the tanks completely.
Q.39.
Hydroplaning happens most often when:
A vehicle is traveling faster than 60 mph.
Tire pressure is too low.
Tire tread is too deep.
Q.40.
When starting a vehicle, warning lights and buzzers:
Should not light up or sound.
Should turn on and shut off quickly.
Should turn on and remain on.
Q.41.
If you’re unfamiliar with the area in which you must back up, you should:
Get out of your vehicle and walk around the area to become more familiar with it.
Not use both side mirrors because it can be distracting.
Wait for someone else to back up in the area so you can see how they do it.
Q.42.
A dual air brake system:
Consists of two separate air brake systems that share a single set of controls.
Is a single air brake system with two different sets of controls.
Consists of one air brake system for the left side of the truck and one system for the right side of the truck, each with its own set of controls.
Q.43.
When driving on packed snow, you should reduce your speed by:
One-half or more.
About one-third.
About one-quarter.
Q.44.
Improperly loaded cargo can:
Look bad to other drivers.
Hurt or kill the driver during a quick stop.
Make it easier to stop a vehicle.
Q.45.
With the exception of the straight line backing exercise, a driver may exit their vehicle and check its position during testing exercises up to:
One time.
Two times.
Three times.
Q.46.
If you have more than one license:
You likely won’t be caught.
You should not tell anyone.
You may get caught through the states' shared computer network.
Q.47.
If the safety relief valve in the air brake system releases air:
The compressor needs more air.
The air pressure has become too high.
The brakes are fully operational.
Q.48.
A cracked rim should be:
Repaired by welding.
Relocated to one of a pair of dual tires.
Replaced.
Q.49.
Within 10 minutes of stopping on the side of the road, you must:
Place emergency warning devices.
Alert local law enforcement.
Call a mechanic.
Q.50.
When parking, you should not use the parking brake if:
The brakes are very hot.
The brakes are very cold.
There is snow on the ground.
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