FL CDL Doubles/Triples case studies
FL CDL Doubles/Triples · Put your knowledge to work in context.
The Doubles/Triples (T) endorsement is added to a Florida Class A commercial driver license so the holder can legally tow two or three trailers behind a single tractor. It is aimed at drivers working in line-haul trucking, package and parcel feeder networks, auto transport, and bulk fuel or aggregate operations where double-bottom and triple-trailer combinations are standard. The FL CDL Doubles/Triples case studies are 5 cases and about 3,064 words.
1Night Coupling of a Converter Dolly on a Sloped Yard
At 22:30 in a Tampa terminal, you must build a set of doubles: a 28-foot lead pup, a 28-foot rear pup, and a converter dolly. The dolly was dropped on a pad with a 2% slope; its wheels are chocked and its air tanks are empty, so its spring brakes are set.
707 words, about 4 min2Pre-Trip on a Triple Set with a Cracked Dolly Frame
At 05:00 you are assigned a triple set: three 28-foot trailers and two converter dollies. The temperature is 34°F and you have 30 minutes before departure.
622 words, about 3 min3Right Turn from a Two-Lane Road into a Narrow Street
You are driving a set of doubles-a 53-foot lead trailer and a 53-foot rear trailer-north on a two-lane road with 12-foot lanes. You need to turn right onto a 24-foot-wide street.
623 words, about 3 min4Brake Fade on a 6% Grade with Loaded Doubles
You are descending a 6% grade that is 2.5 miles long with a set of loaded doubles. The payload is 40,000 pounds.
590 words, about 3 min5Empty Pups in a Crosswind on a Bridge
You are pulling a set of empty 28-foot doubles across a 1.5-mile bridge. The crosswind is 30 mph gusting to 45 mph, and the speed limit is 55 mph.
522 words, about 3 min