FREE CMLA Equipment Operation & Maintenance Questions and Answers

Question 1

What is the first step before operating any laboratory equipment?

Accepted Answer

Read the user manual

Answer

Before operating any laboratory equipment, the most critical first step is to thoroughly read and understand the user manual. This ensures safe and correct operation, familiarizes the user with specific features, safety precautions, and troubleshooting procedures, preventing accidents and equipment damage.

Question 2

What routine check should be performed before using a centrifuge?

Accepted Answer

Balance the tubes

Answer

Before operating a centrifuge, it is crucial to balance the tubes by placing samples of equal weight directly opposite each other in the rotor. Failure to balance the tubes can lead to severe vibrations, damage to the centrifuge, and potential shattering of tubes, creating a hazardous situation.

Question 3

What maintenance should be performed on a microscope regularly?

Accepted Answer

Clean lenses with lens paper

Answer

Regular maintenance of a microscope is essential for its longevity and optimal performance. The delicate lenses should only be cleaned with specialized lens paper and a suitable lens cleaning solution to avoid scratching or damaging the optical surfaces. Using abrasive materials can permanently impair image quality.

Question 4

How often should pipettes be calibrated?

Accepted Answer

Every 3–6 months

Answer

Pipettes are precision instruments used for accurate liquid measurement, and their calibration is critical for reliable experimental results. Regular calibration, typically every 3-6 months or as recommended by the manufacturer, ensures that the pipettes dispense the correct volumes, maintaining the quality and accuracy of laboratory work.

Question 5

Which piece of equipment is used to measure small liquid volumes accurately?

Accepted Answer

Micropipette

Answer

A micropipette is a highly precise instrument specifically designed to measure and transfer very small volumes of liquid, typically in the microliter range. Unlike beakers or graduated cylinders, which are for larger, less precise measurements, micropipettes offer the accuracy required for many laboratory procedures.

CMLA - Certified Lab Assistant Practice Test

CMLA - Certified Lab Assistant Practice Test

FREE CMLA Equipment Operation & Maintenance Questions and Answers