The USPS Postal Exam 955 is now the Skilled Maintenance Assessment (SMA). Our interactive Excel study guide covers every domain — 142 questions, 6 full sample tests, 40+ live calculators. Built by a working maintenance engineer. Instant download.
Every domain tested on the SMA is covered in its own dedicated tab — organized, plain-English, and built to study in, not just read.
Unlike a static PDF or an expensive subscription course, this is a living study tool you can actually work in.
Domain-specific questions with full written explanations — not just answer letters. Understand the why, not just the what.
Enter your values and get instant results. Ohm's Law, gear ratios, transformer ratios, hydraulic force, and more — all built in.
Type A, B, C, or D — the correct answer and explanation appear automatically. Study actively, not passively.
Six complete SMA sample tests — filtered, organized, and integrated by domain so you can practice exactly like the real assessment.
Plain-English explanations written by a working maintenance engineer — not a textbook author. Practical, clear, and to the point.
Open it wherever you work. No special software, no app to install. Microsoft Excel or free Google Sheets both work perfectly.
Anyone applying for a USPS maintenance position that requires the SMA:
Your file is available immediately after purchase. No shipping. No subscription. No expiration. Buy on Etsy or direct through Payhip — either way you get instant access. Open in Excel or Google Sheets and start studying today.
Published by Southport Apps, LLC — Updated for 2026–2027