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 or four possible answer choices. Test questions come from the Oregon Commercial Driver 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 should brake hard.
You should not brake as it could cause the wheels to lock.
You should turn the wheel very sharply.
You should hold down the brakes until you are past the hazard.

The inspections should be done the same way each time.
Different items should be checked each time.
It is acceptable to check items in a different order each time.
Not every item needs to be inspected each time.

Stopping is always effective.
Swerving may be more effective than stopping.
You may change lanes without looking.
You should drive on the shoulder.

Keep the vehicle running while adding coolant.
Open the radiator cap quickly.
Not use gloves to touch the radiator cap.
Wait for the engine to cool before adding coolant.

That the nuts are loose.
That the nuts are wet.
That the nuts need to be replaced.
That the nuts are the wrong size.

Oregon CDL Permit Test - Double

If turning to avoid a hazard:

You must have an air brake endorsement:

When completing pre-trip inspections:

When trying to avoid a hazard:

If coolant has to be added to a system without a recovery tank, you should:

What can rust around the wheel nuts indicate?

Poisonous fumes can enter the cab due to:

Number of questions:	20
Passing score:	16

To use a vehicle with air brakes.
To drive any truck with a trailer.
To transport hazardous materials.

A defective exhaust system.
The wrong type of fuel being used.
A lack of oil in the engine.
Under-inflated tires.