SFST Written Test Questions and Answers | Latest Version | 2025/2026 | Correct & Verified

SFST Written Test Questions and Answers | Latest Version | 2025/2026 | Correct & Verified How many validated clues must be observed on the HGN test to indicate impairment? Four out of six clues. During the Walk-and-Turn test, how many steps must the subject take each way? Nine heel-to-toe steps down and nine back. What should the subject do if they lose balance during instructions? Return to the starting position and follow the officer’s instructions. How many clues are there in the Walk-and-Turn test? Eight clues. What is one clue of impairment in the Walk-and-Turn test? Starting too soon before instructions are complete. 2 How many validated clues must be observed in the Walk-and-Turn test to indicate impairment? Two or more clues. What is the main purpose of the Standardized Field Sobriety Test? To help determine if a driver is impaired by alcohol or drugs. Which three tests make up the SFST battery? Horizontal Gaze Nystagmus, Walk-and-Turn, and One-Leg Stand. What is nystagmus? An involuntary jerking of the eyes that can indicate impairment. What must an officer check before beginning the HGN test? Equal pupil size and ability to track equally in both eyes. How many total clues are possible on the HGN test? Six clues, three in each eye. 3 How long must a subject hold their foot up during the One-Leg Stand test? For 30 seconds. What should a subject do with their arms during the One-Leg Stand test? Keep arms at their sides. How many clues are there in the One-Leg Stand test? Four clues. Name one clue observed during the One-Leg Stand. Hopping to maintain balance. What does SFST stand for? Standardized Field Sobriety Test. What is the maximum BAC level allowed for drivers over 21 in most U.S. states? 0.08% 4 What is the first phase of the DUI detection process? Vehicle in motion. What is the second phase of DUI detection? Personal contact. What is the third phase of DUI detection? Pre-arrest screening. Why is the Walk-and-Turn test considered a divided attention test? Because it requires the subject to perform mental