CPC CPC Adulteration & Specimen Validity Testing 3

Question 1

What is the acceptable pH range for a valid urine specimen in federal drug testing?

Accepted Answer

4.0 to 11.0

Answer

5.5 to 8.0

Answer

3.0 to 10.0

Answer

6.0 to 9.0

Question 2

Why do some individuals attempt to add nitrites to a urine specimen before collection?

Accepted Answer

Nitrites can destroy drug metabolites such as THC-COOH, potentially producing a false negative result

Answer

Nitrites raise the specific gravity of urine to mask dilution

Answer

Nitrites lower the pH of the specimen to within normal range

Answer

Nitrites create a color change that mimics a normal specimen

Question 3

How does a laboratory detect the presence of glutaraldehyde in a urine specimen?

Accepted Answer

Through specific chemical validity tests that identify this adulterant by its reactivity or immunoassay interference

Answer

By visually inspecting the specimen for cloudiness

Answer

By measuring the specimen's temperature at the time of receipt

Answer

By testing the specimen with a standard drug immunoassay only

Question 4

If a collector observes a donor attempt to pour a substance into the specimen cup, what must the collector do?

Accepted Answer

Immediately stop the collection, document the observation on the CCF, and notify the DER

Answer

Allow the collection to complete and flag the specimen for laboratory inspection

Answer

Confront the donor and demand they hand over the substance

Answer

Call law enforcement before taking any further action

Question 5

What is the consequence for a donor if their specimen is confirmed as adulterated under DOT regulations?

Accepted Answer

The result is reported to the MRO and employer as a refusal to test, with the same consequences as a positive result

Answer

The donor is given an immediate opportunity to provide a new specimen under direct observation

Answer

The result is reported as a cancelled test with no adverse action

Answer

The donor is required to pay for the cost of the validity testing

Question 6

Which federal agency's regulations govern specimen validity testing procedures for transportation industry drug testing programs?

Accepted Answer

The Department of Transportation (DOT) under 49 CFR Part 40

Answer

The Drug Enforcement Administration (DEA)

Answer

The Occupational Safety and Health Administration (OSHA)

Answer

The Food and Drug Administration (FDA)