DOT Reasonable Suspicion

First published: September 2, 2026Last verified: September 2, 2026Reviewed by the CertQuestUSA team

TL;DR

DOT Reasonable Suspicion: a 90-question practice bank for the real DOT / FMCSA Carrier Compliance standard, 1 full paper of 50 questions each with no repeats, every question citing the real regulation it comes from.

Where these questions come from

Every question in this bank cites a real source -- primarily 49 CFR (100%) of this exam's citations.

Not sure where you stand? Take the free diagnostic — 10 real questions across the exam's domains, no sign-up required, with a domain-by-domain breakdown at the end.

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1

full paper

50

questions per paper

90

questions in the bank

What this exam covers

Alcohol Misuse Symptom Recognition16%
Controlled Substance Use Symptom Recognition20%
Referral and SAP Evaluation Process32%
Reasonable Suspicion Testing and Documentation32%

5 real sample questions

A supervisor notices a driver has bloodshot eyes and an unsteady gait before a shift. Which category of alcohol misuse indicator does this best represent?

A. Physical indicators

B. Speech indicators

C. Performance indicators

D. Behavioral indicators

Source: 49 CFR 382.603

A driver has an unusual chemical or unfamiliar odor on their clothing along with dilated pupils. Which indicator category does this best represent?

A. Physical indicators

B. Performance indicators

C. Speech indicators

D. Behavioral indicators

Source: 49 CFR 382.603

A normally cooperative driver becomes secretive, evasive with answers, and avoids routine check-ins with no stated reason. Which indicator category does this represent?

A. Behavioral indicators

B. Physical indicators

C. Speech indicators

D. Performance indicators

Source: 49 CFR 382.603

A driver makes an unusual number of small errors on a delivery manifest they normally complete accurately and quickly. Which indicator category does this best represent?

A. Performance indicators

B. Physical indicators

C. Speech indicators

D. Behavioral indicators

Source: 49 CFR 382.603

A supervisor has completed the 60 minutes of alcohol misuse training and the separate 60 minutes of controlled substances training required by 382.603. What is the combined minimum training time the regulation requires?

A. 120 minutes

B. 60 minutes total, shared between both topics

C. 90 minutes

D. 180 minutes

Source: 49 CFR 382.603

Real-world data for this exam

Heavy and Tractor-Trailer Truck Drivers: real median wageMay 2025$58,640/yr Controlled Substances/Alcoholsince 2023-01-0112,993 violations Part of the real CDL Driver career pathExplore ›

Frequently asked questions

How many questions are on the CertQuestUSA DOT Reasonable Suspicion practice test?

90 questions total, split into 1 full paper of 50 each with no repeats across papers.

What topics does the DOT Reasonable Suspicion test cover?

4 domains, with the heaviest weight on Referral and SAP Evaluation Process (32%), Reasonable Suspicion Testing and Documentation (32%), and Controlled Substance Use Symptom Recognition (20%).

Where do CertQuestUSA's DOT Reasonable Suspicion questions come from?

Primarily 49 CFR (100%) of this bank's citations -- computed directly from this exam's own question sources, not a generic description.

Is there a free diagnostic for DOT Reasonable Suspicion?

Yes -- 10 real questions across the exam's domains, no sign-up required, with a domain-by-domain breakdown at the end.

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