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Kentucky CDL Permit Test - Double

Number of questions: 20
Passing score: 16
Directions: This endorsement is required if the driver will pull two or three trailers. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. To pass, the applicant must answer at least 16 questions correctly. Each question has three possible answer choices. Test questions come from the Kentucky Commercial Driver License Manual. Questions come from chapters covering: Driving Safely, Air Brakes (if applicable), Combination Vehicles and Doubles and Triples. The Double/Triple endorsement can be used with the Class A CDL.
You have made error so far
Passing grade —
4 or fewer errors


Rarely occurs with large trucks.
Usually happens when vehicles are traveling faster than 65 mph.
Can occur with a minimal amount of water on the roadway.

If a vehicle's Anti-Lock Braking System (ABS) is malfunctioning:

The vehicle will have no brakes.
The vehicle will still be able to brake.
The vehicle will likely travel faster than usual.

When operating a set of doubles, the shut-off valves at the rear of the first trailer should be in their:

Lifted position.
Closed position.
Open position.

When traveling on a downgrade, your vehicle will:

Slow down.
Travel at the same rate as on level roadway.
Speed up.

When stopping, you should:

Press down the brake pedal quickly.
Press down the brake pedal gradually.
Lift up the brake pedal quickly.

Black ice is:

A thick layer of ice on the road.
A thin layer of ice on the road.
Ice that is black from debris on the road.

When conducting a check of the engine compartment during a vehicle inspection, you should not:

Check the engine oil level.
Check the coolant level.
Drain the brake fluid.
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