Mississippi CDL Combination 1 - DMV Written Test Questions with Answers - MCQGeeks.com

Q.1

The trailer hand valve should be used:

Regularly to activate the trailer brakes in all driving conditions.
Only to test the trailer brakes.
Only in inclement weather when the trailer may skid.
Only if the trailer is carrying a load.

Q.2

To prevent a trailer from rolling over, you should:

Speed up when nearing a corner.
Make sudden steering moves.
Take on-ramps faster than the posted speed limit.
Drive slowly around corners.

Q.3

When traveling more slowly than 40 mph, maintain at least ____ of following distance per every 10 feet of your vehicle.

One second
Two seconds
Three seconds
Four seconds

Q.4

If you use the trailer hand brake while your trailer is skidding, it will:

Stop the skid.
Straighten the trailer.
Continue the skid.

Q.5

Operating combination vehicles usually requires ____ operating single vehicles.

Less skill than
About the same level of skill as
More skill than

Q.6

Combination vehicles:

Are usually shorter than single commercial vehicles.
Are usually lighter than single commercial vehicles.
Require more skill to drive than single commercial vehicles.
Are easier to drive than single commercial vehicles.

Q.7

To help prevent rollovers, you should:

Accelerate quickly after stopping.
Drive slowly around turns.
Keep the load near the back of the trailer.
Keep the load on one side of the trailer.

Q.8

To control surge when stopping, you should not:

Keep a steady pressure on the brakes.
Brake well in advance of a stop.
Release the brakes too quickly.

Q.9

A tractor protection valve is:

A device that keeps air in the tractor or truck brake system, should the trailer break away or develop a bad leak.
A device that prevents theft.
A device that controls fuel levels.
A device that allows the battery to recharge efficiently.

Q.10

The best way to recognize that your trailer has begun to skid is by:

Seeing other drivers' faces.
Seeing it in your mirrors.
Feeling it.
Listening to the radio.

Q.11

If a load is placed on one side of a trailer, the trailer:

May lean, and could result in a rollover.
May add extra support during turns.
Have improved braking.
Have improved steering.

Q.12

A tractor protection valve:

Keeps air in a brake system if there is a bad leak.
Prevents a truck from being stolen.
Prevents a trailer from being accidentally released.

Q.13

The "crack-the-whip" effect can:

Turn over a trailer.
Be more effective than braking.
Make a truck move faster.

Q.14

A trolley valve:

Should be used while driving.
Should only be used to test trailer brakes.
Should be used when parking uphill.

Q.15

A driver should test the tractor protection valve by:

Pulling the yellow, diamond-shaped knob.
Releasing air with the brake pedal.
Unlocking the trailer doors.

Q.16

Pushing in the trailer air supply control will:

Supply the trailer with air.
Deactivate the air brakes.
Prevent the vehicle from skidding.

Q.17

When braking with ABS, you should:

Push the brake pedal harder than usual.
Push the brake pedal as you normally would.
Push the brake pedal more lightly than usual.

Q.18

Rollovers happen when:

You drive too slowly.
You are stopped.
You turn too quickly.
You plan an escape route.

Q.19

____ are the cause of more than half of all accident-related truck driver deaths.

Truck rollovers
Motorcycles
Slippery roads
Pedestrians

Q.20

During a trip, the ____ should be open.

Rear service line shut-off valve
Rear supply line shut-off valve
Inner shut-off valves

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