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

Q.1

Before a drive, ensure that air flows to all trailers by:

Opening the rear shut-off valves and listening for escaping air.
Closing the rear shut-off valves and listening for escaping air.
Disconnecting air supply lines and listening for escaping air.
Rolling each trailer down a hill and testing the brakes.

Q.2

To prevent a rollover, a driver should:

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

Q.3

What is the Johnson bar?

A hand valve that works the trailer brakes
A valve that indicates the fuel level
A valve that measures the amount of liquid in the air brake system
A valve that allows for the release of excess pressure in the braking system

Q.4

When driving a trailer with ABS, you should:

Not depress the brakes as much as you would when driving a vehicle without ABS.
Use extra braking force to ensure the ABS kicks in.
Brake as you would when driving a vehicle without ABS.
Try to not brakes as often as you would when driving a vehicle without ABS.

Q.5

Large combination vehicles take the longest amount of time to stop:

When fully loaded.
When partially loaded.
When empty.
When mostly loaded.

Q.6

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.7

Pull out the trailer air supply control to test:

The parking brake.
The trailer emergency brakes.
The trailer service brakes.
The landing gear.

Q.8

If a trailer begins to skid, the driver should:

Lock the brakes.
Release the brakes.
Steer in the opposite direction.
Accelerate.

Q.9

When entering or crossing traffic while driving a combination vehicle, it is especially important that you:

Sound your horn.
Make sure there is a large enough gap for your vehicle.
Expect other drivers to make room for your vehicle.
Let other drivers wave you into their lane.

Q.10

If a trailer is too high:

It will not make a difference when coupling.
It may not couple correctly.
Coupling will be more secure.
Coupling will be easier.

Q.11

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

Truck rollovers
Motorcycles
Slippery roads
Pedestrians

Q.12

If colors are being used to distinguish glad hands, which color is used for service lines?

Orange
Yellow
Green
Blue

Q.13

Look for matching colors when coupling glad hands. Service lines are often:

Green.
Orange.
Red.
Blue.

Q.14

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.15

Trailers manufactured after ____ must be equipped with Anti-Lock Braking Systems (ABS).

1943
1998
2009
2015

Q.16

In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when:

Air pressure drops to a level between 20 and 45 psi.
You are experiencing a trailer jackknife.
Wheels have regained traction after a skid.
Air pressure is above 45 psi.

Q.17

Proper coupling technique:

Is the same on all vehicles.
Is essential to the safe operation of a vehicle.
Includes ensuring that the fifth wheel plate is not greased.
Can be learned over time.

Q.18

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.19

The trailer hand valve should be used:

To test the trailer brakes.
To check the connection between the trailer and tractor.
To accelerate.
To test the lights on the trailer.

Q.20

Having ABS on only one axle:

Does not change braking in any way.
Is not possible.
Will allow the driver additional control over their vehicle when braking.
Will cause extra strain on the other axles.

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