Medical Technologist Test Medical Technologist General Information 5

Question 1

Which chain of custody procedure is MOST critical when handling forensic or medicolegal specimens?

Accepted Answer

Documenting every person who handled the specimen with time and date

Answer

Chain of custody requires continuous documentation of every individual who handled the specimen to ensure legal admissibility of results.

Question 2

A laboratory's accuracy is BEST evaluated by:

Accepted Answer

Participating in external proficiency testing programs

Answer

External proficiency testing (PT) compares a laboratory's results to peer laboratories and reference values, providing an objective assessment of accuracy.

Question 3

Pre-analytical variables that can affect laboratory test results include all of the following EXCEPT:

Accepted Answer

Instrument calibration frequency

Answer

Instrument calibration is an analytical variable occurring within the laboratory; patient status, transport, and collection technique are pre-analytical variables.

Question 4

Which of the following correctly describes the difference between sensitivity and specificity of a laboratory test?

Accepted Answer

Sensitivity = ability to detect true positives (diseased); specificity = ability to detect true negatives (healthy)

Answer

Sensitivity (true positive rate) reflects a test's ability to correctly identify diseased individuals; specificity (true negative rate) reflects identification of healthy individuals.

Question 5

The principle of atomic absorption spectrophotometry (AAS) is based on:

Accepted Answer

Absorption of specific wavelengths of light by ground-state atoms

Answer

AAS measures the amount of light absorbed by free ground-state atoms at a wavelength specific to each element, enabling quantification of metals like lead or copper.

Medical Technologist Test Practice Test

Medical Technologist Test Practice Test

Medical Technologist Test Medical Technologist General Information 5