35People in Texas practiced here todayTexas CDL Doubles & Triples: Uncoupling Doubles/Triples Test 2026
15 questions on the correct order to uncouple a doubles or triples combination without losing air pressure control.
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About the Texas CDL uncoupling test
Taking a set apart safely means the trailers stay exactly where you put them. The Texas CDL doubles and triples uncoupling test on this page rehearses that order: secure the rear trailer, lower its landing gear, disconnect the lines, unlock the dolly, and pull clear only when nothing can roll.
Expect practice items on setting the trailer brakes before releasing anything, chocking wheels when parking on a grade, disconnecting dolly air and electrical lines in the right order, storing safety chains, and lowering the dolly support before separating the units. Real doubles and triples endorsement knowledge for Texas CDL holders in 2026.
Check your Texas CDL Manual for the exact number of questions on the endorsement exam, since Texas sets that count itself. Drill this test until the uncoupling steps never come out in the wrong sequence.
Every question traces back to the Texas CDL Manual - skim the right-of-way and signs chapters before your retake.
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