Take Colorado CDL Double Test 1

QUESTION 1 / 20

Trailers manufactured after ____ must be equipped with Anti-Lock Braking Systems (ABS).

Choose one answer below.

A1943✓B1998✓C2009✓D2015✓

QUESTION 2 / 20

If the brakes “pull” to one side or the other when you use them, it's a sign that:

Choose one answer below.

AThe brakes are working properly.✓BThe brakes need to be checked.✓CThe brakes are new.✓DThe brakes have too much stopping power.✓

QUESTION 3 / 20

The ____ tells a driver how much pressure is in the air tanks.

Choose one answer below.

AApplication pressure gauge✓BAir compressor governor✓CSupply pressure gauge✓DDrum brake✓

QUESTION 4 / 20

Which of the following is not a part of an air brake system?

Choose one answer below.

AA service brake system✓BA parking brake system✓CAn emergency brake system✓DAn axle brake system✓

QUESTION 5 / 20

If braking at a speed of 55 mph while driving on dry pavement, the brake lag can add ____ to your vehicle's total stopping distance.

Choose one answer below.

A32 feet✓B15 feet✓C50 feet✓D10 feet✓

QUESTION 6 / 20

When a vehicle is started, warning lights and buzzers:

Choose one answer below.

AShould stay on for several minutes.✓BShould turn off within a few seconds.✓CShould stay on until manually turned off.✓DShould not come on.✓

QUESTION 7 / 20

When driving a double or triple, it is important to remember that:

Choose one answer below.

AThe vehicle requires more space than most other vehicles.✓BOther drivers will likely get out of your way when necessary.✓CThe vehicle likely weighs the same as other vehicles.✓DThe vehicle can easily fit into small spaces.✓

QUESTION 8 / 20

When entering traffic, the driver of a double or triple needs to be aware that doubles and triples:

Choose one answer below.

ANeed more space to merge into traffic than smaller vehicles.✓BAre exempt from most speed limits.✓CAre difficult for other drivers to see.✓DAre not permitted on interstates.✓

QUESTION 9 / 20

During an applied leakage test, the maximum leakage rate for a triple combination vehicle is:

Choose one answer below.

A10 psi in a minute.✓B8 psi in a minute.✓C6 psi in a minute.✓D4 psi in a minute.✓

QUESTION 10 / 20

The air storage tanks:

Choose one answer below.

AHold only enough air for one braking cycle.✓BHold enough air for brakes to be used several times if the compressor stops working.✓CDo not hold air unless there is an emergency.✓DHold enough air for more than 1,000 braking cycles.✓

QUESTION 11 / 20

Driving at night is:

Choose one answer below.

ASafer than driving during the day.✓BJust as safe as driving during the day.✓CMore dangerous than driving during the day.✓DDiscouraged.✓

QUESTION 12 / 20

How should you check your hydraulic brakes?

Choose one answer below.

APump the brakes three times, then apply firm pressure to the brake pedal for five seconds. The brake pedal should not move.✓BPump the brakes three times, then apply firm pressure to the brake pedal for five seconds. The brake pedal should slowly move toward the floor.✓CPump the brakes three times, then apply firm pressure to the brake pedal for five seconds. The brake pedal should slowly rise.✓DPump the brakes three times, then apply firm pressure to the brake pedal for five seconds. The brake pedal should be easy to push to the floor.✓

QUESTION 13 / 20

When passing another vehicle, you should:

Choose one answer below.

AMake eye contact with the other driver.✓BAssume the other driver doesn’t see you.✓CHonk your horn.✓DWave to other drivers.✓

QUESTION 14 / 20

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

Choose one answer below.

AUsing tires with worn tread✓BUsing properly inflated tires✓CUsing new tires✓DTraveling at speeds under 10 mph✓

QUESTION 15 / 20

What do anti-lock brakes do?

Choose one answer below.

AHelp a driver avoid wheel lockup✓BLock up the front wheels✓CPrevent a vehicle from accelerating while traveling uphill✓DPrevent a vehicle from accelerating while traveling downhill✓

QUESTION 16 / 20

When driving, it is important to:

Choose one answer below.

AKeep your attention focused in front of your vehicle.✓BLook only to the front and right side of your vehicle.✓CLook only to the front and sides of your vehicle.✓DLook to the front, sides, and rear of your vehicle.✓

QUESTION 17 / 20

Why do you need to drain air tanks regularly?

Choose one answer below.

ABecause the air gets old and needs to be replaced✓BBecause compressed air contains some water which must be drained from the tanks✓CTo allow for a change in air pressure✓DTo remove bad air from the tanks✓

QUESTION 18 / 20

A one-way check valve:

Choose one answer below.

ADrains the water and compressor oil from the air tanks.✓BPrevents air from escaping if the air compressor has a leak.✓CActivates the emergency brakes when there is a leak.✓DHolds the spring brakes in position until they are used.✓

QUESTION 19 / 20

When using road speed to know when to switch gears, you should:

Choose one answer below.

ALearn what speeds each gear is good for and shift up when necessary.✓BWatch other vehicles and try to keep pace.✓CWatch other trucks and shift when they shift.✓DUse the speed limit as a guide.✓

QUESTION 20 / 20

If you’re unfamiliar with the area in which you must back up, you should:

Choose one answer below.

AGet out of your vehicle and walk around the area to become more familiar with it.✓BNot use both mirrors, as that can cause too much distraction.✓CWait for someone else to back up in the area so you see how they do it.✓DTurn on your high beam headlights.✓