# TrueLine Prep

> TrueLine Prep (truelineprep.com) is an independent, unofficial study resource for two US professional certification exams: the Construction Health and Safety Technician (CHST) exam from the Board of Certified Safety Professionals (BCSP), and the Certified Welding Inspector (CWI) exam from the American Welding Society (AWS). It offers a free 25-question diagnostic per exam and takes $49 refundable preorders for a planned full question bank (target launch January 31, 2027).

Important notes:

- Not affiliated with, sponsored by, or endorsed by BCSP or AWS. CHST is a certification mark of BCSP; CWI is a mark of AWS.
- The practice questions are a prototype: they have NOT yet been reviewed by a certified expert. All questions are original, not actual exam questions.
- Exam facts on the guide pages (fees, pass rates, formats) are quoted from official BCSP and AWS documents linked on each page and were last checked on 2026-10-18. Fees and rules can change; the official sites are authoritative.
- AWS does not publish an official CWI pass rate that we could find.
- Operated by interrage, a sole proprietorship based in Japan. Purchases are processed by Gumroad as merchant of record.

## CHST guides

- [CHST pass rate: 61.8% (BCSP 2024 Annual Report)](https://truelineprep.com/chst/pass-rate/index.md): The CHST exam pass rate was 61.8% (1,593 of 2,578 candidates) in BCSP's 2024 Annual Report. What the number means, how it compares with ASP and CSP, and how to prepare.
- [CHST exam cost: $140 application + $300 exam](https://truelineprep.com/chst/exam-cost/index.md): How much the CHST exam costs: BCSP lists a $140 application fee and a $300 exam fee, or $426 when bought together. Retake, extension, and renewal fees explained with sources.
- [CHST blueprint explained, with practice questions](https://truelineprep.com/chst/blueprint/index.md): The CHST5 exam blueprint explained: four domains weighted 36.6%, 19.9%, 22.5%, and 21%, what each covers, and free sample practice questions with explanations.

## CWI guides

- [CWI exam cost: $1,255 for AWS members, $1,520 for non-members](https://truelineprep.com/cwi/exam-cost/index.md): How much the CWI exam costs: AWS lists $1,255 for members and $1,520 for non-members (with a 3-year membership), or $2,000 / $2,265 with Part B training. Retest rules explained.
- [CWI exam Parts A, B, and C explained](https://truelineprep.com/cwi/exam-parts/index.md): The CWI exam has three parts: Part A Fundamentals (165 questions, 135 minutes, closed book), Part B Practical (46 questions, 120 minutes), and Part C Code Book (open book). 72% needed on each part.
- [CWI practice questions, and how hard the exam is](https://truelineprep.com/cwi/practice-questions/index.md): Free CWI practice questions with explanations, plus what makes the CWI exam hard: about 49 seconds per Part A question, 72% on every part, and limited retests. AWS does not publish a pass rate.

## Tools and product

- [Free CHST diagnostic](https://truelineprep.com/diagnostic/?cert=chst): 25 questions across the 4 CHST blueprint domains, results by domain and a study plan (runs in the browser).
- [Free CWI diagnostic](https://truelineprep.com/diagnostic/?cert=cwi): 20 Part A Fundamentals questions plus 5 Part C code-use concepts.
- [CHST preorder page](https://truelineprep.com/chst/): planned full question bank, $49 refundable preorder, planned launch price $149.
- [CWI preorder page](https://truelineprep.com/cwi/): planned full question bank, $49 refundable preorder, planned launch price $179.

## Optional

- [Terms and refund policy](https://truelineprep.com/terms/): full refund any time before launch; automatic refund if not launched by 2027-03-02.
- [Privacy policy](https://truelineprep.com/privacy/)