Colorado CDL Combination 2 - DMV Written Test Questions with Answers - MCQGeeks.com

Q.1

Using the trailer hand brake while experiencing a trailer jackknife will:

Stop the skid.
Straighten the trailer.
Increase traction.
Continue the skid.

Q.2

If unsure if a trailer is equipped with ABS, you can:

Check under the trailer for wheel speed sensors coming from the back of the brakes.
Try driving on a slippery surface and see if ABS kicks in.
Assume it does have ABS.
Remove a tire and look for the ABS sensor on the axle.

Q.3

To lower the risk of a rollover, you should:

Load the cargo as far forward as possible.
Load the cargo as far back as possible.
Load the cargo as low as possible.
Stack the cargo as high as possible.

Q.4

The emergency air line:

Is controlled by the foot brake.
Is connected to the relay valves.
Supplies air to the trailer air tanks.
Prevents skids.

Q.5

Starting in which year were newly manufactured trailers required to have ABS?

1972
1987
1998
2004

Q.6

To test the trailer service brakes, you should:

Move the vehicle forward slowly and apply the brakes with the brake pedal.
Reverse the vehicle slowly and apply the brakes with the hand control.
Reverse the vehicle slowly and apply the brakes with the brake pedal.
Move the vehicle forward slowly and apply the brakes with the hand control.

Q.7

While inspecting a coupling, you should go under the trailer and:

Detach the jaws from around the kingpin.
Make sure the locking lever is in the "emergency" position.
Remove the safety latch.
Look into the back of the fifth wheel.

Q.8

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.9

After connecting the air lines to the trailer while coupling, you should:

Supply air to the trailer.
Chock the wheels.
Inspect the fifth wheel.
Connect the electrical cord.

Q.10

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

Ask another driver.
Use your mirrors to determine if the trailer has left the lane.
Release the brake pedal and then push it down again.
Watch the jackknife warning light on the control panel.

Q.11

If a trailer's spring brakes do not release when you push the tractor air supply control, you should:

Check the air line connections.
Release the pintle hook.
Replace the spring brakes.
Drive normally without checking anything.

Q.12

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.13

Trailers with low underneath clearance may be difficult to drive:

On interstate highways.
Over railroad crossings.
On dirt roads.
At the posted speed limit.

Q.14

What is another name for the service line?

Control line
Exchange line
Surplus line
Parallel line

Q.15

One way to prevent a rollover is to:

Move cargo to the left side of the rig.
Keep cargo centered on the rig.
Move cargo to the right side of the rig.
Keep cargo as far from the ground as possible.

Q.16

Rollovers happen when:

A truck driver is driving too fast.
The driver of a vehicle in front of a truck is moving to slowly.
A truck driver is driving too slowly.
ABS is working effectively.

Q.17

To prevent a rollover, a driver should:

Keep cargo low.
Place cargo high.
Keep cargo loose.
Turn quickly.

Q.18

When a combination vehicle goes around a corner:

The turn should be made as tightly as possible.
The front and rear wheels move in different paths.
The rear wheels should run over the curb.
It is acceptable for street signs to be knocked over if they are too close to the road.

Q.19

Test the tractor protection valve by:

Removing the air supply knob.
Removing the parking brake control knob.
Releasing air with the brake pedal.
Releasing air with the gas pedal.

Q.20

Rollovers are most likely to happen when:

Drivers turn too fast.
Driver turn too slowly.
It is windy.
It is raining.

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