District Of Columbia cdl Double - Test 1
Number of questions: 20
Passing score: 80%
Acceptable number of errors: 4
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 four possible answer choices. Test questions come from the Washington D.C. 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.
To DMV Handbooks14. Regarding winter driving, all of the following are true, except:
Front tires should have a tread depth of at least 4/32 an inch.
Tires should be slightly deflated.
Rear tires should have a tread depth of at least 2/32 an inch.
Use a gauge to verify that each tire has a safe tread depth.