Idaho Doubles & Triples Test — Quick Facts
FormatWritten knowledge test
Questions20 questions
Passing score80% (16/20)
Min. age (intrastate / interstate)18 / 21
CLP hold before skills test14 days min
Government feeSee Idaho DMV →
Start the Free Idaho Doubles & Triples Test →
20 questions · one per page · your progress saves automatically
Idaho Doubles & Triples Practice Tests
3 full practice tests, each with 20 questions drawn from the Idaho CDL question bank. Your score and progress save as you go.
About the Idaho Doubles & Triples Test
The Doubles/Triples (T) endorsement lets you pull two or three trailers in Idaho. More couplings and converter dollies mean less margin for error, so the test covers assembly, inspection, trailer order by weight, and the increased rollover risk.
PM
From Pedro, behind the wheelEvery coupling you add is one more place for air to leak, and the back trailer of a set whips harder than people expect. The test centers on dolly hookup and trailer order — heaviest behind the tractor.
What Test-Takers Miss Most
- 1Coupling and securing converter dollies
- 2Putting trailers in order by weight
- 3Increased rollover and 'crack-the-whip' risk
Idaho CDL Requirements & Fees
Idaho follows the federal CDL framework: a minimum age of 18 for intrastate driving and 21 for interstate, a commercial learner's permit you must hold at least 14 days before the skills test, and the 80% passing standard. License fees and retake rules are set by Idaho and change from time to time, so check the official source below for current amounts before you go in.
📘
Official Idaho CDL Handbook & FeesCurrent requirements, fees, and the manual this test is based on
OPEN →
Frequently Asked Questions
How many questions are on the Idaho CDL Doubles & Triples test?
The Doubles & Triples test has 20 questions, and you need 16 correct to pass at the 80% threshold used across the U.S. under FMCSA standards. Exact counts can vary slightly by state, so confirm with the Idaho CDL handbook.
What score do I need to pass in Idaho?
You need 80% — that's 16 of 20 questions correct on the Doubles & Triples test.
How much does a Idaho CDL cost?
CDL fees are set by Idaho's licensing agency and change periodically, so we don't quote a figure that could go stale. Check current amounts on the official Idaho CDL page.
Is this Idaho practice test free and accurate?
Yes — it's completely free, based on the Idaho CDL handbook, and written and verified by Pedro Marin, an active CDL holder. No registration required.
Related Idaho CDL Tests