CABT Laboratory Equipment 2

Question 1

Which type of centrifuge is specifically designed to separate blood components by spinning at low speeds (400-1200 RPM)?

Accepted Answer

Blood bank centrifuge

Answer

Blood bank centrifuges operate at low speeds optimized for separating red cells, plasma, and platelets without damaging fragile blood components.

Question 2

A biomedical technician notices a pH meter gives inconsistent readings. The FIRST corrective step should be:

Accepted Answer

Recalibrate with fresh buffer solutions

Answer

Recalibration with fresh, properly prepared buffer solutions is always the first step when troubleshooting inconsistent pH meter readings.

Question 3

What is the primary function of a laminar flow hood in a clinical laboratory?

Accepted Answer

To provide a sterile work environment by directing HEPA-filtered air over the work surface

Answer

Laminar flow hoods direct HEPA-filtered air in a unidirectional flow over the work surface to protect samples and cultures from contamination.

Question 4

A hematology analyzer flags a specimen with clogged apertures. Which maintenance procedure should be performed?

Accepted Answer

Run a bleach solution followed by rinse cycles

Answer

Running a bleach (sodium hypochlorite) cleaning solution followed by rinse cycles dissolves protein and fibrin clogs in aperture tubes.

Question 5

Which pipette type delivers the most accurate volumes for analytical chemistry procedures?

Accepted Answer

Volumetric pipette

Answer

Volumetric pipettes are calibrated to deliver a single, precise volume (TC or TD) and are the most accurate for analytical work.

(CABT) Certified Associate in Biomedical Technology Practice Test