Can occur at speeds as slow as 30 mph.

Only occurs at extremely high speeds.

Happens most frequently when tire pressure is too high.

Happens most frequently when tires have good tread.

Not both be in contact with the road surface.

Be different sizes from one another.

Are used to drain water and oil from the air tanks.

Allow rain water to enter the tanks.

Must remain open while driving.

Checked only when changing lanes.

Checked only if there is a reason to suspect a problem.

Mississippi CDL Passenger 2 - DMV Written Test Questions with Answers

Q.1

Hydroplaning:

Only occurs at extremely high speeds.
Can occur at speeds as slow as 30 mph.
Happens most frequently when tire pressure is too high.
Happens most frequently when tires have good tread.

Q.2

When driving down a steep grade, your brakes may fade. What happens if brakes fade?

They become quieter.
They become less effective.
They work better than usual.
They work differently from front to back.

Q.3

Mirrors should be adjusted:

While moving.
When the trailers are straight.
When you are standing next to the vehicle.
By an assistant.

Q.4

To best reduce the distractions of a cell phone, you should:

Stay on a single call for an entire trip.
Turn the phone off before driving.
Only us the phone to accept incoming calls.
Use the phone to text rather than talk.

Q.5

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

Loss of hydraulic pressure
Brake fade on long hills
Downshifting

Q.6

If you see taillights ahead while you are driving in fog:

The lights may not indicate where the road is as the vehicle may have pulled off the roadway.
You can assume the vehicle ahead is on the road.
It may be an optical illusion.

Q.7

During an applied leakage test, the maximum leakage rate for a double combination vehicle is ____ in a minute.

2 psi
4 psi
6 psi

Q.8

While driving, if you notice anything affecting safety or mechanics, you should:

Stay quiet and see if the problem goes away.
Make a written report that includes your concerns.
Try to fix the issue yourself.
Not use that part of the vehicle and hope others don't notice the problem.

Q.9

Dual tires should:

Not both be in contact with the road surface.
Not touch one another.
Be different sizes from one another.

Q.10

While driving, your mirrors:

Should not be used.
Should only be used when changing lanes.
Should be checked regularly.

Q.11

When checking the power steering fluid during a vehicle inspection, you will need to do each of the following, except:

Show where the power steering fluid dipstick is located.
Check for adequate power steering fluid.
Ensure that the power steering fluid level is above the full mark.
Ensure that the power steering level is above the refill mark.

Q.12

Emergency equipment in a vehicle is:

Only required for vehicles that are transporting hazardous materials.
Only required during interstate travel.
Required.

Q.13

Air tank drains:

Allow rain water to enter the tanks.
Are used to drain water and oil from the air tanks.
Should never be opened.
Must remain open while driving.

Q.14

On a passenger bus, carry-on baggage:

Should be placed in the aisle.
Must be stored away from the aisle.
Must be kept on a rider’s lap.

Q.15

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.16

Of the following, which is not a recommended way to spot potential signs of trouble?

Watching the gauges
Using your senses
Checking critical items only at the beginning and end of a trip

Q.17

If pulled off to the side of the road, you should:

Allow your taillights to alert other motorists.
Turn on your emergency flashers to warn other motorists.
Keep your lights off to avoid distracting other motorists.
Keep your door open to warn other motorists.

Q.18

Mirrors should be:

Checked only when changing lanes.
Checked frequently.
Checked only if there is a reason to suspect a problem.

Q.19

What is a danger of rolling back when you start to accelerate?

The transmission may be damaged.
The truck is not made to go backwards.
You may hit a vehicle behind you.
You may lose your position in traffic.

Q.20

Extremely hot temperatures can cause:

Tire failure.
A trailer to disengage.
Lights to malfunction.
Increased gas mileage.