Can occur with a minimal amount of water on the roadway.

Usually happens when vehicles are traveling at speeds above 65 mph.

Can be helpful to see a wider area.

Cannot be used on vehicles transporting hazardous materials.

Are illegal to be used in most states.

More dangerous than driving during the day.

Safer than driving during the day.

Just as safe as driving during the day.

South Dakota CDL Passenger 1 - DMV Written Test Questions with Answers

Q.1

Skids caused by acceleration can usually be resolved by:

Accelerating.
Removing your foot from the accelerator.
Coming to a complete stop.

Q.2

Hydroplaning:

Rarely happens to trucks.
Usually happens when vehicles are traveling at speeds above 65 mph.
Can occur with a minimal amount of water on the roadway.

Q.3

Which of the following indicates drowsy driving?

Eyes going out of focus by themselves
Having trouble keeping your head up
Drifting from lane to lane
All of the above

Q.4

Convex mirrors:

Cannot be used on vehicles transporting hazardous materials.
Can replace flat mirrors.
Can be helpful to see a wider area.
Are illegal to be used in most states.

Q.5

A curve's posted design speed is:

Safe for buses.
Safe for all vehicles, including buses.
The minimum speed at which the curve should be driven.
Not always safe for buses.

Q.6

Strong winds usually cause the greatest issues for:

Lighter vehicles.
Heavier vehicles.
Flatbed trailers.

Q.7

Driving at night is:

Safer than driving during the day.
Just as safe as driving during the day.
More dangerous than driving during the day.
Discouraged.

Q.8

If you identify a distracted driver on the road, you should:

Tailgate them.
Flash your lights at them.
Give them plenty of space.

Q.9

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.10

When performing a pre-trip inspection and looking into the fifth wheel gap, you should:

Make sure there is a gap between the kingpin and the locking jaws.
Make sure the locking jaws are fully closed around the kingpin.
Make sure the locking jaws are loose.

Q.11

When starting the engine as part of the pre-trip inspection, the driver should:

Listen for unusual noises.
Rev the engine.
Turn up the radio.
Turn on the heater.

Q.12

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.13

During the vehicle inspection test, you will be required to do all of the following, except:

Walk around the vehicle.
Point to or touch each item.
Explain what you are checking and why.
Crawl under the vehicle.

Q.14

You should always be able to stop within:

10 feet of your vehicle.
1,000 feet of your vehicle.
Your view of the road ahead.
30 seconds of hitting the brakes.

Q.15

Which of the following is not an example of a distracted person that motorists should be worried about?

A driver talking to a passenger in their vehicle
A child on the side of the road
A construction worker on the side of the road
A person sitting on a bench waiting for a bus

Q.16

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.17

Which of the following is not a cause of hydraulic brake failure?

Loss of hydraulic pressure
Brake fade on long hills
Downshifting

Q.18

When turning, you should:

Signal before the turn.
Turn off your turn signal just before starting the turn.
Signal only if vehicles are in front of you.

Q.19

If you notice anything affecting the safety or mechanical functioning of your CMV while driving, you should:

Stay quiet and see if the problem goes away.
Make a written report that includes your concerns.
Try to fix it yourself.

Q.20

When completing an offset back/left parking maneuver, a driver should:

Pull straight forward, then back to the left.
Drive straight back, then pull forward to the left.
Pull straight forward, then drive straight back.