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Connecticut CDL Permit Test - Air Brakes

Number of questions: 25
Passing score: 20
Directions: This endorsement is required for driving a vehicle with air brakes. To receive this endorsement, applicants must pass a written test. The test consists of 25 multiple choice questions. Each question has three or four answer choices. To pass, the applicant must answer at least 20 questions correctly. Test questions come from the Connecticut Commercial Driver License Manual. Questions come from the chapter covering: Air Brakes. The Air Brakes endorsement may be used with the Class A, B or C CDL.
You have made error so far
Passing grade —
5 or fewer errors

If the low pressure warning light comes on while you are driving:

Braking will only be possible if there is still enough air in the tanks.
You can apply the brakes 14 times before the air in the system runs out.
You should continue to drive normally and check the brake system when it is convenient.
You should stay at least 100 feet away from other vehicles.

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.

32 feet
15 feet
50 feet
10 feet

Before driving a vehicle with air brakes, you should ensure that the spring brakes come on automatically when:

Air pressure falls below 45 psi.
Air pressure falls below 20 psi.
Driving downhill.
Driving uphill.

What must be on an air tank in an air-braked vehicle?

A check valve
A lock
A trap door
An oxidizer

When leaving your vehicle unattended:

The parking brake must be always be used.
The parking brake should never be used.
Windows in the cab should be lowered.

An Anti-Lock Braking System (ABS):

Is not available for vehicles with air brakes.
Is not helpful in most driving situations.
Can help you maintain control when braking.
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