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

Q.1

Driving a combination vehicle ____ than driving a single vehicle.

Is easier
Requires more driving skill
Is better for training
Is safer in inclement weather

Q.2

What does the trailer air supply control look like?

It is a square blue knob.
It is a triangular yellow knob.
It is an eight-sided red knob.
It is a circular orange knob.

Q.3

When uncoupling a trailer, landing gear should be:

Raised completely.
Lowered halfway.
Just off the pavement.
Firmly on the ground.

Q.4

Glad hands are:

Coupling devices.
Happy passengers.
Eager mechanics.
Pleased drivers.

Q.5

Push in the trailer air supply control to:

Activate the emergency brakes.
Deactivate the air brakes.
Sound the horn.
Supply the trailer with air.

Q.6

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.7

What is another name for the service line?

The signal line
The cable line
The surplus line
The power line

Q.8

An Anti-Lock Braking System (ABS):

Allows wheels to lock up.
Prevents wheels from locking up.
Makes it easier to turn a large vehicle.
Assists with the operation of brake lights.

Q.9

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.10

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.11

What happens when the wheels of a trailer lock up?

The trailer will often continue to move in a straight line.
The trailer may disengage.
The trailer may swing around.
Steering will become easier.

Q.12

Operating a combination vehicle usually requires ____ operating a single vehicle.

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

Q.13

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.14

Rollovers happen when drivers:

Turn too quickly.
Do not driving fast enough.
Pay attention to the road.
Drive illegally.

Q.15

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.16

Avoid needing to make sudden lane changes by:

Using your horn to encourage other drivers to move out of your lane.
Only driving slower than the posted speed limit.
Watching the road ahead while driving.
Pulling off the road and waiting when there is high traffic.

Q.17

If you need to back your trailer but cannot back up in a straight path, you should:

Back toward the passenger's side.
Back toward the driver's side.
Swerve back and forth while backing.
Always turn to your right.

Q.18

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

Orange
Yellow
Green
Blue

Q.19

When coupling a trailer:

Make sure to couple matching glad hands.
Any glad hand can be connected to any other glad hand.
It is best to leave one glad hand unattached.
Only one set of glad hands should be connected.

Q.20

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.

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