Drug & Alcohol Testing Protocols Flashcards
7 cards from real CSC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Drug & Alcohol Testing Protocols flashcards as text
A donor provides a urine specimen that appears blue-green in color. What should the collector suspect?
Answer: Possible adulteration with a toilet bowl cleanser
Blue or green urine in a collection cup can indicate contamination with toilet bowl cleaning agents that contain dyes or copper sulfate.
Under DOT rules, which safety-sensitive function requires pre-employment drug testing before the employee first performs the function?
Answer: Driving a commercial motor vehicle (CMV) requiring a CDL
CDL holders who perform safety-sensitive functions such as operating a CMV must pass a pre-employment drug test before they can perform those duties.
If a donor leaves the collection site before the collection process is complete without the collector's permission, this is considered:
Answer: A refusal to test
Leaving the collection site before the process is complete without authorization constitutes a refusal to test under 49 CFR Part 40.
Which of the following is NOT a required step in maintaining chain of custody for a urine specimen?
Answer: Refrigerating the specimen at the collection site for 24 hours before shipping
Specimens should be shipped to the lab as soon as possible; there is no DOT requirement to refrigerate the specimen at the collection site for 24 hours before shipping.
A non-negative initial drug screen result from a lab means:
Answer: The specimen requires confirmatory GC/MS or LC-MS/MS testing
A non-negative initial screen is not a positive result — it triggers confirmatory testing using gas chromatography/mass spectrometry to identify and quantify the substance.
For random drug testing under DOT rules, how must employees be selected?
Answer: By a scientifically valid random selection process ensuring each employee has an equal chance
DOT mandates a scientifically valid random selection method, such as a random number table or computer-based random number generator, so every covered employee has an equal chance of selection.
What is the correct procedure when the tamper-evident seal on a specimen bottle is found broken upon arrival at the laboratory?
Answer: The lab rejects the specimen and reports it as a cancelled test
A broken or missing tamper-evident seal means chain of custody has been compromised; the lab must report the specimen as rejected and the test is cancelled.