Is necessary to warm up parts of the engine.

Is encouraged to improve gas mileage.

Should be done on surfaces with poor traction.

Is usually less stable than other smaller commercial vehicles.

Is usually able to be driven faster than a straight truck.

Is always easier to drive than other commercial vehicles.

Does not need a special endorsement to be driven.

Colorado CDL Double 2 - DMV Written Test Questions with Answers

Q.1

Rough acceleration:

Can damage a vehicle.
Is necessary to warm up parts of the engine.
Is encouraged to improve gas mileage.
Should be done on surfaces with poor traction.

Q.2

If driving a vehicle with a manual transmission, you can prevent your vehicle from rolling backward when starting from a stop by:

Partly engaging the clutch before removing your foot from the brake pedal.
Placing the vehicle in reverse before moving forward.
Fully engaging the clutch before removing your foot from the brake pedal.
Placing the vehicle in neutral before moving forward.

Q.3

If an approaching driver is using their high beam headlights, you should:

Look directly at the headlights.
Flash your high beam lights to remind the driver to switch to their low beams.
Look to the right side of your lane until the vehicle has passed.
Pull to the side of the road until the vehicle has passed.

Q.4

Hydraulic brakes can fail for one of two reasons. Which of the following is one of those reasons?

There is a loss of hydraulic pressure.
You are driving uphill.
The brakes get too cold.
The brakes are used too much in one day.

Q.5

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

1972
1987
1998
2004

Q.6

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.7

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.8

Which of the following is not an indication of damaged brakes?

Cracked drums
Shoes with oil or grease on them
Shoes worn thinly
Pads free of oil or grease

Q.9

To confirm that a trailer has ABS, you can:

Look under the trailer for wheel speed sensors coming from the back of the brakes.
Look under the hood for the ABS sticker.
Look at the tires.
Remove a tire and look for the ABS sensor on the axle.

Q.10

If the air pressure warning light comes on, you should:

Continue driving normally.
Activate your hazard lights and continue driving.
Call the local law enforcement agency.
Safely exit the roadway and stop.

Q.11

Steering that feels heavy is often a sign of:

Rear tire failure.
Front tire failure.
A shifting load.
The coolant overheating.

Q.12

If pulled off to the side of the road, you should:

Allow your taillights to alert other motorists.
Turn on your emergency flashers to warn other motorists.
Keep your lights off to avoid distracting other motorists.
Keep your door open to warn other motorists.

Q.13

Trailers with low underneath clearance may be difficult to drive:

On interstate highways.
Over railroad crossings.
On dirt roads.
At the posted speed limit.

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

During a static leakage test, the maximum leakage rate for a triple combination vehicle with air brakes is ____ in a minute.

3 psi
5 psi
7 psi
9 psi

Q.16

A double or triple:

Is usually able to be driven faster than a straight truck.
Is usually less stable than other smaller commercial vehicles.
Is always easier to drive than other commercial vehicles.
Does not need a special endorsement to be driven.

Q.17

Pressing and releasing a brake pedal unnecessarily can:

Release air faster than it can be replaced.
Add more air to the braking system.
Make the brake pedal more sensitive.
Create a loud noise.

Q.18

Emergency equipment, such as a fire extinguisher, is:

Only needed for vehicles transporting hazardous materials.
Only needed for interstate travel.
Required.
Only required when transporting passengers.

Q.19

Which of the following is most likely to result in hydroplaning?

Using tires with worn tread
Using properly inflated tires
Using new tires
Traveling at speeds under 10 mph

Q.20

Driving a combination vehicle ____ than driving a single vehicle.

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