SFST Study Guide 2026
Everything you need to pass the SFST exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 SFST Exam Format at a Glance
📚 SFST Topics to Study (39)
✍️ Sample SFST Questions & Answers
1. During court testimony, a defense attorney asks why the officer did not use a stopwatch during OLS. What is the correct NHTSA-recommended response?
NHTSA recommends that officers use a timing device to accurately measure the 30-second OLS period.
2. Implied consent laws typically require that a driver who refuses a chemical test following a failed SFST faces:
Implied consent laws impose administrative license suspension as a civil penalty for chemical test refusal.
3. The primary route of alcohol elimination from the body is through:
Approximately 90–95% of consumed alcohol is eliminated through hepatic metabolism (liver), while small amounts are excreted via breath, urine, and sweat.
4. What is the process of elimination in multiple-choice testing?
Process of elimination involves identifying and removing clearly wrong answers, increasing the probability of selecting the correct answer from remaining options.
5. A suspect informs the officer they have a glass eye. How should the officer proceed with the HGN test?
NHTSA guidelines allow the HGN to be administered using the functioning eye only, and the officer should document the condition.
6. When using the SFST battery to detect drug impairment (rather than alcohol), which test in the standard battery is considered LEAST reliable as a standalone indicator?
HGN is most specifically linked to alcohol and certain drug categories; stimulants or cannabis alone may not reliably produce nystagmus, making it the least universal drug indicator.
🎯 Free SFST Practice Tests
📖 SFST Guides & Articles
What Practice Test Geeks adds beyond an AI chat for SFST
An AI chatbot can quiz you, but it can't reproduce the exam conditions or keep your record. Here you get:
- A timed, full-length SFST mock exam — 50 questions in 60 minutes with a 80% pass mark, modeled on the official exam's question count and time limit, followed by a score report broken down by exam domain.
- A fixed SFST question bank: the same test every attempt, so your score is comparable from one try to the next instead of changing with every regenerated quiz.
- Progress saved on your device: completed tests, scores and missed questions stay in My Progress, so you can retake only what you got wrong.
- A printable SFST cheat sheet you can print or save as a PDF.
- SFST flashcards built from the same question bank.
- Free SFST practice tests with the correct answer shown after each question.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- nhtsa.gov — Retake policy, test delivery, passing score · verified Oct 2026
- theiacp.org — Renewal · verified Oct 2026