FREE CMLA Laboratory Safety & Procedures Questions and Answers

Question 1

On the NFPA hazard diamond, which color represents flammability?

Accepted Answer

Red

Answer

The NFPA 704 hazard diamond uses a color-coded system to quickly convey chemical hazards. The red section, located at the top of the diamond, specifically indicates the flammability hazard of a substance. This allows emergency responders to quickly assess the fire risk.

Question 2

What is the primary purpose of a laboratory fume hood?

Accepted Answer

Contain and exhaust harmful fumes

Answer

A laboratory fume hood is a critical piece of safety equipment designed to protect lab personnel from exposure to hazardous fumes, vapors, and particulate matter. It works by drawing air from the lab into the hood and then exhausting it safely outside, preventing the buildup of dangerous substances in the breathing zone.

Question 3

If a chemical splashes into your eyes, how long should you flush them at the eyewash station?

Accepted Answer

15 minutes

Answer

In the event of a chemical splash to the eyes, immediate and thorough flushing is crucial to prevent severe injury. ANSI/ISEA Z358.1 standards recommend flushing the eyes continuously for a minimum of 15 minutes at an eyewash station. This extended period ensures that all traces of the chemical are removed and minimizes potential damage.

Question 4

Which personal protective equipment (PPE) is essential when handling biohazard materials?

Accepted Answer

Gloves and lab coat

Answer

When handling biohazard materials, it is essential to wear appropriate Personal Protective Equipment (PPE) to prevent exposure and contamination. Gloves protect hands from direct contact, while a lab coat provides a barrier for clothing and skin, minimizing the risk of infection.

Question 5

Before disposing of used sharps, they must be:

Accepted Answer

Placed in a puncture‑resistant sharps container

Answer

Used sharps, such as needles, scalpels, and broken glass, pose a significant risk of injury and infection. To ensure safety, they must be immediately disposed of in designated puncture-resistant sharps containers. These containers prevent accidental needlesticks and safely contain biohazardous waste until proper disposal.

CMLA - Certified Lab Assistant Practice Test

CMLA - Certified Lab Assistant Practice Test

FREE CMLA Laboratory Safety & Procedures Questions and Answers