POST Dispatch Practice Test 2025 - Free Dispatch Practice Questions and Study Guide

In a fire scenario, dark grey smoke typically indicates that materials such as furniture or wood products are burning. This type of smoke often arises from the combustion of organic materials that are present in many household items. When wood or treated wood products burn, they release various compounds that can contribute to a darker smoke color compared to smoke produced from the burning of lighter materials.

The characteristics of dark grey smoke can provide firefighters and responders important insights into what is burning. Understanding the source of the smoke helps in assessing potential hazards and determining the best approach for tackling the fire. Smoke from furniture, for instance, may contain various synthetic materials, finishes, and other components that can influence both toxicity and fire behavior.

Other options involve different materials that produce distinct smoke colors and characteristics. For instance, smoke resulting from fabric or upholstery typically tends to be darker but can also take on a different hue based on the synthetics involved. Electrical fires can produce a bright, acrid smoke, while burning common household waste usually produces a lighter or more variable smoke color. Recognizing the implications of dark grey smoke is therefore crucial for effective fire response and safety measures.