CMLA REE CMLA Laboratory Safety & Procedures 5

Question 1

Which of the following best describes the purpose of using 70% isopropyl alcohol rather than 100% for surface disinfection?

Accepted Answer

The water in 70% solutions allows longer contact time and better protein denaturation

Answer

100% is too expensive for routine use

Answer

70% is less toxic to laboratory workers

Answer

100% alcohol leaves a residue that contaminates specimens

Question 2

A laboratory receives a specimen with a cracked tube and no secondary containment. The FIRST step is to:

Accepted Answer

Don appropriate PPE before handling the package

Answer

Process the specimen immediately to avoid further delay

Answer

Discard the specimen and order a recollect without notification

Answer

Contact the physician for verbal results

Question 3

Which type of laboratory waste requires incineration or autoclaving before disposal?

Accepted Answer

Biohazardous cultures and stocks of infectious agents

Answer

Empty reagent bottles

Answer

Expired non-hazardous reagents

Answer

Used paper towels with non-infectious material

Question 4

What does 'universal precautions' require laboratory personnel to assume about all patient specimens?

Accepted Answer

All blood and body fluid specimens are potentially infectious regardless of diagnosis

Answer

Only specimens labeled 'infectious' require precautions

Answer

Precautions apply only to HIV and hepatitis B samples

Answer

Precautions are optional for vaccinated employees

Question 5

Which action should be taken when a laboratory worker's lab coat becomes heavily contaminated with blood?

Accepted Answer

Remove the coat immediately and place it in a biohazard laundry bag

Answer

Continue working until the end of the shift to avoid waste

Answer

Rinse the coat in the sink and return it to a locker

Answer

Spray with 70% alcohol and continue wearing it

Question 6

In laboratory quality control, a Levey-Jennings chart is used to:

Accepted Answer

Monitor analytical precision and detect instrument drift visually

Answer

Track inventory of reagents over time

Answer

Schedule preventive maintenance of equipment

Answer

Document employee training completion

Question 7

Which regulation governs laboratory-developed tests and quality standards for clinical laboratories in the United States?

Accepted Answer

CLIA (Clinical Laboratory Improvement Amendments)

Answer

HIPAA

Answer

OSHA Bloodborne Pathogens Standard

Answer

FDA 510(k) clearance