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Louisiana
Louisiana CDL Knowledge Test Class A 1
Answers
Q.1.
How does doubling your speed from 20 mph to 40 mph affect your vehicle's braking distance?
It stays about the same.
It doubles.
It quadruples.
Q.2.
ABS allows you to:
Drive faster.
Brake harder.
Stay in control when stopping.
Q.3.
Foundation brakes are used:
Only on the front wheels of a vehicle.
Only on the rear wheels of a vehicle.
On each wheel of a vehicle.
Q.4.
When experiencing cold weather, be sure to check your vehicle's alcohol evaporator:
Every three hours.
Every day.
Every other week.
Q.5.
Rust around wheel nuts may mean:
It has rained recently.
The nuts could be loose.
The tires should be replaced.
Q.6.
When backing a truck, you should:
Only use the side mirrors on the driver’s side.
Use both side mirrors.
Only use the side mirrors on the passenger's side.
Q.7.
When passing another vehicle, you should:
Make eye contact with the other driver.
Assume the other driver doesn't see you.
Slow down.
Q.8.
Driving with a cargo of hanging meat in a trailer:
Is discouraged during the summer months.
Can be problematic because animals are attracted to the smell of the meat.
Is challenging because the load has a high center of gravity.
Q.9.
To prevent becoming an aggressive driver you should:
Increase your speed.
Make gestures at other drivers.
Give other drivers the benefit of the doubt.
Q.10.
Convex mirrors:
Cannot be used on vehicles transporting hazardous materials.
Are illegal in most states.
Can help drivers see a larger area.
Q.11.
To ensure that you do not slow down traffic when driving a large truck, you should:
Switch gears while driving uphill.
Try to pass another vehicle while driving uphill.
Stay in the right lane whenever possible.
Q.12.
What does the air compressor governor do?
It stops the compressor from pumping air.
It turns on the air compressor.
It stores the compressed air.
Q.13.
If you must drive in reverse, using driver's side backing:
Is always encouraged.
Is discouraged.
Is only recommended if it is raining.
Q.14.
If other vehicles are having a difficult time getting around your truck on a road with two or more lanes, you should:
Speed up.
Drive on the shoulder.
Use the right lane.
Q.15.
Which of the following is not a reason to cover cargo?
To protect people from spilled cargo
To protect the cargo from weather
To protect the cargo from animals
Q.16.
When approaching a vehicle for a pre-trip inspection, a driver should look under the vehicle:
To see if the vehicle is on an incline.
To see if there are any fresh fluids on the ground.
To see if the vehicle is in a parking spot.
Q.17.
Truck tractors with air brakes built on or after March 1, 1997 must have:
An Anti-Lock Braking System (ABS).
Bluetooth.
A GPS.
Q.18.
A driver who stops at a green light could be:
An impaired driver.
A driver who is color blind.
A person who does not know the rules of the road.
Q.19.
What is often found in compressed air?
Water
Cardboard
Brake fluid
Q.20.
Mirrors should be:
Checked only when changing lanes.
Checked frequently.
Checked only if there is a reason to suspect a problem.
Q.21.
When leaving your vehicle:
The air brakes should be applied.
The parking brake should be applied.
Brakes should not be applied if the vehicle is left out of gear.
Q.22.
On slippery roads, you should:
Accelerate and slow down frequently.
Adjust your driving to match weather conditions.
Tailgate other vehicles.
Q.23.
When in heavy traffic, the safest driving speed is:
Slower than the speed being driven by surrounding traffic.
The same speed being driven by surrounding traffic.
Faster than the speed being driven by surrounding traffic.
Q.24.
An Anti-Lock Braking System (ABS):
Is not available for vehicles with air brakes.
Is not helpful in most driving situations.
Can help you maintain control when braking.
Q.25.
When encountering a railroad crossing during the driving test, you should:
Pass another vehicle on the tracks if the other vehicle is moving too slowly.
Change lanes while on the tracks.
Not change gears while on the tracks.
Q.26.
If you’re not sure what to do to extinguish a fire in your vehicle, you should:
Use water.
Stay inside the vehicle.
Wait for the firefighters.
Q.27.
Parked delivery trucks may be hazardous because:
The trucks are often shiny.
People are often in a hurry when exiting such trucks and may not look for other vehicles.
Packages often fall out of the trucks and into the road.
Q.28.
Dry bulk tanks:
Usually have low centers of gravity.
Usually have high centers of gravity.
Are usually not allowed to cross railroad tracks.
Q.29.
Once they have begun to drive after a tire on their vehicle has been changed, a driver should stop after a short distance to:
Ensure that the lug nuts are still tight.
Ensure that the tire is wearing evenly.
Ensure that the air pressure of the tire is still acceptable.
Q.30.
When traveling at speeds under 40 mph, you should maintain at least ____ of following distance for every 10 feet of your vehicle's length.
One second
Two seconds
Three seconds
Q.31.
When taking the driving test and asked to make a turn, you should:
Not use a turn signal since you were told to make the turn.
Check traffic only to your right.
Check traffic in all directions.
Q.32.
Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to indicate when the ABS is not working.
Green
Blue
Yellow
Q.33.
The heavier the vehicle:
The less important the brakes become.
The harder the brakes need to work.
The quieter the brakes will sound.
Q.34.
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.35.
Drowsy driving is most common during:
The night.
The early morning.
The mid-afternoon.
Q.36.
Which of the following is not a good rule when using turn signals?
Signal early. Signal well before a turn or lane change.
Signal continuously. Do not cancel a signal until the turn is completed.
Don’t over-signal. If no one is near you, there is no need to signal.
Q.37.
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.38.
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.39.
When driving in winter, which of the following should receive extra attention in a pre-trip inspection?
Coolant and antifreeze levels
The air conditioning unit
The oil pressure
Q.40.
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.41.
In hot weather, spots on the pavement where tar is bleeding:
Are very slippery.
Offer the same amount of traction as the rest of the roadway.
Offer more traction than the rest of the roadway.
Q.42.
A safety belt:
Helps secure a driver in a crash.
Allows a driver to be thrown within their vehicle in a crash.
Makes it difficult for a driver to operate a vehicle.
Q.43.
As part of the vehicle inspection test, a CDL applicant may be asked to:
Check the engine oil level.
Replace a tire.
Remove the alternator belt.
Q.44.
When completing a driver's side parallel parking maneuver, you should:
Pull forward directly into the parking space.
Back up past the parking space, then pull forward into it.
Pull forward past the parking space, then back into it.
Q.45.
Some air brake systems introduce alcohol into the system to:
Make the brakes work without squeaking.
Prevent ice from forming in the brake system.
Prevent people from breathing the air from the system.
Q.46.
A cracked rim should be:
Repaired by welding.
Relocated to one of a pair of dual tires.
Replaced.
Q.47.
To affect a vehicle, ABS:
Must be on all axles.
Must be on the rear axle.
Can be on as few as one axle.
Q.48.
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.49.
When driving on a long downhill slope, you should brake by:
Only using the brakes.
Mostly using the brakes and occasionally downshifting.
Downshifting and then using the brakes.
Q.50.
Water that has collected on a roadway can cause:
Hydroplaning.
Acceleration.
Stopping.
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