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

Q.1

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.2

When glad hands are coupled, the seals should be pressed together at an angle of:

30 degrees.
45 degrees.
60 degrees.
90 degrees.

Q.3

In a double or triple combination:

Cargo weight must be evenly distributed between all trailers.
The heaviest trailer should be positioned directly behind the cab.
The heaviest trailer should be positioned in the rear.
The weight of the trailers does not matter.

Q.4

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.5

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.6

When backing up to couple a trailer, you should position the tractor:

At a 90-degree angle in front of the trailer.
Directly in front of the trailer.
At a 30-degree angle in front of the trailer.
At a 60-degree angle in front of the trailer.

Q.7

What is a tractor protection valve?

A valve to keep air in the brake system should there be a bad leak
A valve that prevents the truck from being stolen
A valve that prevents the driver from going too fast
A valve that prevents the trailer from accidentally being released

Q.8

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.

Q.9

After finishing a pre-trip inspection, you should:

Close the service line valve.
Remove the service line valve.
Leave the emergency line valve open.
Leave the rear shut-off valves open.

Q.10

Using the trailer hand valve while driving:

Will help you turn safely.
Will stop your trailer safely.
Can cause a skid.
Is impossible.

Q.11

If the trailer begins to skid, it is best to:

Release the brakes.
Accelerate.
Quickly turn the steering wheel one way, then the other.
Brake.

Q.12

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.13

If a trailer begins to skid, the driver should:

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

Q.14

The trailer hand valve:

Should always be used for parking.
Should only be used for parking on a downhill.
Should never be used for parking.
Should only be used when transporting cargo.

Q.15

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.16

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

1972
1987
1998
2004

Q.17

Fully-loaded rigs:

Are less likely to roll over than empty rigs.
Are more likely to roll over than empty rigs.
Are just as likely to roll over as empty rigs.
Should not be driven.

Q.18

Failure to keep the fifth wheel plate properly greased could:

Cause the trailer to disconnect.
Cause steering problems.
Cause braking problems.
Affect the lights.

Q.19

During a trip, which shut-off valves should be open?

All shut-off valves should be open.
The rear shut-off valves should be open.
All shut-off valves should be in the open position, except the rear shut-off valves.
No shut-off valves should be open.

Q.20

A loss of air pressure in the emergency line will cause:

The suspension springs to extend.
The tractor protection valve to open.
The rear trailer to detach from the combination.
The emergency brakes to activate.

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