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

Q.1

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.2

When testing ____, you should apply your vehicle's brakes with the hand control while moving the vehicle forward slowly.

The Anti-Lock Braking System
The emergency braking system
The trailer service brakes

Q.3

A trailer that is too high:

May not couple correctly.
Will couple securely.
Is not an issue.

Q.4

What is another name for the service line?

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

Q.5

When driving while pulling trailers, you should:

Make sudden turns with the steering wheel.
Avoid making sudden moves.
Push the accelerator to the floor when starting from a stop.

Q.6

The trailer hand valve should be used:

To accelerate in rural areas.
Only to test the trailer brakes.
Together with the brake pedal.
On slippery surfaces.

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

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.9

In an empty combination vehicle, the stiff suspension springs and strong brakes will have:

High traction.
Low traction.
No traction.

Q.10

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.11

Rollovers happen when:

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

Q.12

If the emergency air line loses pressure:

The Anti-Lock Braking System will activate.
The service air line will activate.
The emergency brakes will activate.

Q.13

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.14

To prevent a rollover, a driver should:

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

Q.15

The service air line is often controlled by the foot brake and is attached to the ____ valves.

Relay
Supply
Emergency

Q.16

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.17

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.

Q.18

In a sudden turn, the ____ trailer is the most likely to turn over.

Front
Last
Middle
First

Q.19

What is another name for the service line?

The control line
The utility line
The open line
The parallel line

Q.20

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.

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