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Oklahoma 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 Oklahoma 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.
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Passing grade —
4 or fewer errors
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1.
When driving in winter, which of the following should receive extra attention in a pre-trip inspection?
Coolant and antifreeze levels
The air conditioning unit
The oil pressure
2.
To prevent your vehicle from rolling backward when beginning to move, you can:
Partly engage the clutch before taking your foot off the brake pedal.
Place the vehicle in second gear.
Use the parking brake when stopping.
3.
If backing a truck:
You should rely on your mirrors to guide you.
You should first walk the area to become more familiar with obstacles.
You should look straight ahead.
4.
An example of required emergency equipment is:
A spare electrical fuse.
A loud horn.
A battery-operated flashlight.
5.
When driving in hot weather:
The air pressure in tires will decrease.
The engine oil can help to keep the engine cool.
Antifreeze is not important.
6.
A low air pressure warning signal:
Is not recommended on vehicles with air brakes.
Is required on vehicles with air brakes.
Is optional on vehicles with air brakes.
7.
An Anti-Lock Braking System (ABS):
Is not available for most trucks.
Is not helpful in most situations.
Is required on newer trucks.
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