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South Dakota
South Dakota CDL Knowledge Test Class B 1
Answers
Q.1.
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.2.
Oversized loads:
Can never be transported by a truck.
Should only be transported during the day.
Should receive proper authorization to ensure compliance with state and local laws.
Q.3.
When traveling down a steep grade, you switch into a lower gear:
Before beginning the grade.
When you have already started the grade.
As far down the grade as possible.
Q.4.
If a tire fails, you should:
Use the brakes.
Stay off the brakes.
Swerve.
Wave your arms at other drivers.
Q.5.
If a driver begins to feel fatigued while driving, they should:
Continue driving.
Drink coffee.
Stop and rest.
Drive faster to finish the trip more quickly.
Q.6.
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.7.
Hanging meat as a cargo:
Creates a safe driving situation.
Creates an unstable load.
Should not be done.
Creates a low center of gravity.
Q.8.
Overloading cargo can have negative effects on all of the following, except:
Steering.
Braking.
Speed control.
The electrical system.
Q.9.
What does ABS do?
Prevent wheel lockup
Prevent the air compressor from overheating
Prevent the front brakes from being used on ice
Prevent the brakes from being used if downshifting would be more effective
Q.10.
Cargo being transported should be checked:
Only before the trip.
Before the trip and again within the first 50 miles of the trip.
Only by the loading personnel.
Q.11.
A fatigued driver:
Is extra alert.
Should take over-the-counter remedies to wake them up.
May make critical decisions too slowly.
Is usually more conscientious than a typical driver.
Q.12.
If an aggressive driver is involved in a crash on the road ahead of you, you should:
Block the driver in with your vehicle.
Stop after the crash scene and report the driver’s aggressive behavior to the police.
Continue driving and mind your own business.
Pull over and yell at the driver.
Q.13.
On newer vehicles, how do you put on the parking brake?
Move a lever to the right.
Push in the yellow, diamond-shaped knob.
Pull out the yellow, diamond-shaped knob.
Pull up on the steering column.
Q.14.
The air pressure in a dual air brake system should build from 85 to 100 psi within:
Two minutes.
15 seconds.
10 minutes.
45 seconds.
Q.15.
If your brakes fail on a downgrade, your best hope to stop is to:
Use an escape ramp.
Use the shoulder.
Drift to a stop.
Q.16.
When starting a vehicle with dual air brakes, pressure of ____ should be built up in the system before it is driven.
10 psi
25 psi
100 psi
200 psi
Q.17.
States verify that a CDL or CLP driver has only one such license by:
Making phone calls to surrounding states.
Using a computerized system that links all states.
Asking the driver.
Looking through the driver's wallet.
Q.18.
Distracted driving:
Can be avoided by eating while driving.
Can be increased by pre-programming radio stations.
Can be avoided by not engaging in complex conversations with others.
Q.19.
An air compressor governor controls:
When the air compressor pumps air into the air storage tanks.
How fast air is pumped into the air storage tanks.
The temperature of the air pumped into the air storage tanks.
Q.20.
Air tank drains:
Should not be used in cold weather.
Are helpful to remove water and oil from the air tanks.
Are used to move air to the brakes.
Q.21.
When driving on the expressway during the skills test, you should:
Switch lanes frequently.
Use your mirrors to check traffic as needed.
Drive on the left side of the lane.
Drive above the posted speed limit.
Q.22.
Pressing and releasing the brake pedal unnecessarily can:
Release air faster than it can be replaced.
Add more air to a brake system.
Make the brake pedal harder to depress.
Create a loud noise.
Q.23.
The suspension system:
Holds up the vehicle and its load.
Keeps the load the proper distance behind the driver’s compartment.
Maintains a safe distance between the vehicle and other vehicles.
Lightens the load for the tires.
Q.24.
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.25.
If a tire rim is damaged, it should be:
Left on the vehicle.
Welded to repair the damage.
Replaced.
Put on the axle farthest from the driver.
Q.26.
If convicted of a traffic violation, you must inform your employer:
Within three hours.
Within a week.
Within 30 days.
Q.27.
If you are driving and the ABS light comes on, it means that the ABS:
Cannot work due to weather conditions.
Has just been activated.
Is not working properly.
Q.28.
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.29.
What happens if brakes become too hot?
They will become too smooth.
They will harden.
They may stop working.
The air compressor will kick in to cool the brakes
Q.30.
To receive a hazardous materials endorsement, an applicant will be required to supply:
Their fingerprints.
Their shoe size.
A list of countries visited within the last 10 years.
Their employment history for the previous five years.
Q.31.
If a load is 40 feet long, the minimum number of tie-downs required to secure the load is:
Two tie-downs.
Three tie-downs.
Four tie-downs.
Q.32.
When backing with a trailer, turning toward the driver’s side is encouraged:
Because it allows the driver a better view.
Because turning toward the passenger side is illegal.
Because other drivers can offer assistance.
Q.33.
Poor weight balance:
Improves a vehicle's handling.
Makes handling a vehicle more difficult.
Increases a driver’s ability to steer.
Makes a vehicle easier to stop.
Q.34.
In general, if you are convicted of a traffic violation in your personal car:
The convicting officer will alert your employer.
Your CDL will not be affected because the violation is on your personal license.
You should tell your employer within six months.
You must tell your employer within 30 days.
Q.35.
To avoid a crash:
Braking is always the best option.
Swerving may be more effective than braking.
Drivers should leave 100 yards of distance between their vehicle and the next.
Q.36.
A tread depth of ____ should be in every major groove of a tire that is not in the front of a commercial motor vehicle.
1/32 of an inch
2/32 of an inch
4/32 of an inch
Q.37.
When making a tight maneuver, you should:
Not use your mirrors, as they can be distracting.
Use your mirrors, but not too frequently.
Use your mirrors frequently.
Rely only on your mirrors.
Q.38.
If the safety relief valve in an air brake system is releasing air:
You should not be concerned as this is a normal process.
There is something wrong with the brakes.
The valve is operational.
Q.39.
If a vehicle has air brakes, the air compressor drive belt should be checked before each drive. In what condition should the belt be?
Loose
Tight
Cracked
Bumpy
Q.40.
If a vehicle is equipped with power steering, the hoses should be checked:
For leaks.
To ensure that they are still clear.
To ensure that they are connected to the battery.
For the proper amount of brake fluid.
Q.41.
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.42.
An emergency brake must be controlled by:
Mechanical force.
Air pressure.
Gravity.
Q.43.
Most heavy-duty vehicles use ____ air brake systems.
Single
Dual
Triple
Quad
Q.44.
What is traction?
Friction between the tires and road
Tires' rates of rotation
The length of time needed to activate the brakes
Q.45.
When driving under wet conditions, what does a lack of spray from other vehicles indicate?
Ice has formed on the road.
The pavement is dry.
The spray is caught on the underside of the vehicle.
The tires have soaked up all the moisture.
Q.46.
Interstate carriers must have what information affixed to the commercial motor vehicles in their fleet?
Trade name
Width of the truck
Length of the truck
Q.47.
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.48.
When using your turn signal, you should:
Signal before beginning the turn.
Turn the signal off before beginning the turn.
Signal only if vehicles are in front of you.
Q.49.
Who is responsible for ensuring cargo is loaded properly?
The driver
The shipper
The recipient
Q.50.
Hanging meat:
Should never be transported by trailer.
Can be an unstable load.
Must be approved by the Environmental Protection Agency (EPA).
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