Study structure
Trade-specific study outlines and self-assessment are implemented in our development framework.
In development
Transport Trailer Technician study app.
We’re building a dedicated Transport Trailer Technician app using the same study framework as our Steamfitter/Pipefitter app.
This app is not available to buy or download yet.
Official references
The app tracks occupational standards and current-exam information separately when the official site publishes a newer standard.
Before release
An internal Android preview has been built. Source review, device testing and question-bank development remain. No release date or final question count has been announced.
Current exam information
100 questions across the trade’s activities.
This is the official exam outline, not the number of practice questions available in this unreleased app.
- A · Performs common occupational skills6 questions
- B · Diagnoses and services suspension systems14 questions
- C · Diagnoses and services brake systems18 questions
- D · Diagnoses and services axles and wheel end assemblies15 questions
- E · Diagnoses and services trailer chassis, bodies and coupling devices17 questions
- F · Diagnoses and services electric and electronic systems14 questions
- G · Diagnoses and services hydraulic systems6 questions
- H · Diagnoses and services temperature control systems10 questions
Occupational standards for Transport Trailer Technician
- Red Seal Occupational Standard (RSOS) (RSOS; current-exam basis)
Some current exams still use a National Occupational Analysis (NOA). A newer RSOS does not automatically replace the standard used for current exams.
Development status updated October 28, 2026. Independent preparation; no affiliation with the official Red Seal Program.