CSC Specimen Validity Testing & Adulteration Detection

Question 1

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

Accepted Answer

4.0 to 9.0

Answer

3.0 to 7.0

Answer

5.0 to 8.0

Answer

6.0 to 10.0

Question 2

Which creatinine concentration indicates a substituted specimen under federal drug testing guidelines?

Accepted Answer

Less than 2 mg/dL

Answer

Less than 10 mg/dL

Answer

Less than 20 mg/dL

Answer

Less than 30 mg/dL

Question 3

Which of the following is classified as an oxidizing adulterant commonly detected during specimen validity testing?

Accepted Answer

Nitrites

Answer

Sodium chloride

Answer

Vinegar (acetic acid)

Answer

Ethanol

Question 4

What specific gravity value, combined with a creatinine below 2 mg/dL, indicates a substituted specimen?

Accepted Answer

Less than 1.0010

Answer

Less than 1.0030

Answer

Less than 1.0050

Answer

Less than 1.0100

Question 5

How does specimen adulteration differ from specimen substitution?

Accepted Answer

Adulteration means adding a foreign substance to interfere with testing; substitution means replacing the specimen entirely

Answer

Adulteration means adding excess water; substitution means using synthetic urine

Answer

Adulteration is undetectable; substitution is always detected

Answer

Adulteration only affects alcohol tests; substitution only affects drug tests

Question 6

Which specimen validity test is specifically used to detect oxidizing adulterants such as bleach, hydrogen peroxide, and nitrites?

Accepted Answer

Oxidant colorimetric test

Answer

Creatinine concentration assay

Answer

Specific gravity measurement

Answer

Surfactant detection test

Question 7

Within what temperature range must a urine specimen fall within 4 minutes of collection to be considered a valid, fresh human sample?

Accepted Answer

90°F to 100°F (32°C to 38°C)

Answer

85°F to 95°F (29°C to 35°C)

Answer

95°F to 105°F (35°C to 41°C)

Answer

80°F to 90°F (27°C to 32°C)