Are more difficult to turn than smaller commercial vehicles.

Turn easily due to their centers of gravity.

Require a longer reaction time than singles.

Are easier to drive than singles.

Are less likely to roll over than singles.

Are less likely to jackknife than singles.

Georgia CDL Double 1 - DMV Written Test Questions with Answers

Q.1

Doubles and triples:

Turn easily due to their centers of gravity.
Are more difficult to turn than smaller commercial vehicles.
Should never be turned.
Always have the right-of-way.

Q.2

Trailers built before 1975 are:

Required to have spring brakes.
Not required to have spring brakes.
Unsafe to drive.
Prohibited from public roadways.

Q.3

One way to avoid jackknifing is to:

Swerve frequently.
Exceed the speed limit.
Look ahead of your vehicle to identify potential hazards.
Drive on the shoulder.

Q.4

Skids caused by acceleration can usually be resolved by:

Speeding up.
Taking your foot off the accelerator.
Coming to a complete stop.
Switching into a higher gear.

Q.5

Compared to other commercial motor vehicles, combination vehicles need more space on the road because they are longer and they:

Need more space to turn and stop.
Drive more slowly.
Are twice the width.
Swerve more often.

Q.6

An air compressor governor will stop the compressor from pumping air once the air tanks have an air pressure level of:

125 psi.
100 psi.
150 psi.
80 psi.

Q.7

Simply changing lanes can cause:

A “crack-the-whip” effect, resulting in a rollover.
A trailer to straighten out.
Confusion over which lane the driver is hoping to use.
Other drivers to reduce their speed.

Q.8

While driving, spring brakes are generally held in place by:

Air pressure.
Chocks.
Foundation brakes.
Sturdy ties.

Q.9

When doing an inspection, ensure that the brake pads are:

Covered with grease.
Covered with coolant.
Covered with oil.
Free of oil or grease.

Q.10

If a vehicle is equipped with power steering, the hoses should be checked:

For leaks.
To ensure that they are still clear.
To ensure that they are connected to the battery.
To ensure that they contain the proper amount of play.

Q.11

When driving through a work zone, you should:

Slow down.
Speed up.
Use a cell phone.
Steer with one hand to keep the other hand free.

Q.12

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.13

Doubles:

Are easier to drive than singles.
Are less likely to roll over than singles.
Are less likely to jackknife than singles.
Require a longer reaction time than singles.

Q.14

If a trailer begins to skid, the driver should:

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

Q.15

When coupling a triple trailer rig:

The trailer immediately behind the cab should be coupled first.
The rear trailer should be coupled first.
The lightest trailer should be coupled first.
The order in which trailers are coupled is not important.

Q.16

What happens when you push in the trailer air supply control knob?

Air is supplied to the emergency lines.
The air system is disconnected from the trailer.
The drain valve is opened.
Air brakes are applied.

Q.17

Most heavy vehicles require ____ to change gears.

Double clutching
Double shifting
Triple clutching
Triple shifting

Q.18

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.19

When driving in fog, you should:

Use the windshield wipers.
Use the low beam lights.
Use the high beam lights.
Use the heater.

Q.20

What happens if, after connecting a trailer, there is no air pressure in the trailer brakes?

The brakes will not work.
There will be no air in the cab.
The load will not be supported properly.
Alternative brakes must be used.