20 questions per attempt
You must answer at least 16 of 20 correctly to score 80% or higher and pass the practice test.
Double / TriplesTexas Endorsement Practice Preparation
Doubles and triples study extends your review to multiple-trailer combinations. Pay attention to the connections between units, the inspection of the entire combination and the handling concerns created by more than one trailer.
Review the connections and the complete vehicle
Keep coupling and uncoupling knowledge separate from driving-situation questions during your first review. Then bring the subjects together by explaining how a connection or brake-system problem could affect the full combination.
- Multiple-trailer coupling and uncoupling concepts
- Inspections and air-brake connections
- Stability and safe handling of multiple-trailer combinations
Study the Texas CDL handbook
Review Section 7 of the Texas Commercial Motor Vehicle Drivers Handbook. Use the handbook to understand the material before practicing questions.
Open handbook sections for this topic (0.5 MB) ↗
Open the complete Texas CDL handbook ↗ · Texas DPS handbook source ↗
Planned practice test format
100 questions in the current practice bank
Each new attempt selects 20 questions from this bank and shuffles the answer choices. Questions may repeat across attempts.
Practice in any order
Choose any topic with active access. Repeat this topic as often as you like during its 30-day access window, whether you pass or need more practice. Passing does not move you automatically to another topic.
Your Texas DPS practice readiness goal
Aim for 95% or higher four to five consecutive times on this topic. The practice tracker marks the goal complete after five consecutive qualifying attempts. A score below 95% resets this topic’s streak. An 80% score passes an attempt, but does not meet the 95% readiness goal. This is our practice benchmark and does not guarantee the official Texas DPS test result.
Account and topic access
$41.60 standard, or $40 with an eligible alternative payment, for 30 days of Doubles/Triples practice. Choose topics, add them to your cart, then register or sign in before payment. Each topic’s access window starts when its payment is confirmed.
Online registration and payment are being connected. You can save and review your selections; call (469) 332-7188 for help completing registration and payment.
Keep endorsement study separate from equipment availability
Doubles/Triples is a distinct endorsement study area from the core Combination topic. The study material and illustrations do not mean doubles or triples equipment is offered for rental. Confirm your operating and licensing requirements with the appropriate authorities.
Doubles/Triples endorsement information · Combination vehicle preparation
Review practice selections and prices or ask about your next CDL step.
Other endorsement preparation pages
Explore the main CLP knowledge tests and endorsements
These are preparation resources. Texas DPS administers the official knowledge tests and determines licensing requirements. CLP preparation is separate from applicable FMCSA ELDT requirements.