Texas Fire Alarm License Practice Test

What characterizes a Cloud Chamber Smoke detector?

1. A detector that uses a heat sensor to detect smoke

2. A detector that draws an air sample into a high humidity, low pressure chamber

3. A detector that activates through sound waves

4. A detector that functions without electrical power

The correct answer is: A detector that draws an air sample into a high humidity, low pressure chamber

A Cloud Chamber Smoke Detector is characterized by its ability to draw an air sample into a chamber that maintains high humidity and low pressure. The principle behind this technology is the enhanced visibility of smoke particles, which condense and become more readily observable in these specific environmental conditions. As air enters the chamber, any smoke present will create a visible trail in the cloud chamber due to the ionization of air particles, which facilitates a more accurate detection of smoke. This method of detection is particularly effective because it allows for a clear differentiation of smoke particles from other particulates in the air, improving overall sensitivity and performance in detecting smoke. The unique operational characteristics of cloud chamber technology make it distinct in the realm of smoke detection. Other detection methods, such as those relying on sound waves or thermal changes, do not utilize air sampling in the same manner and therefore do not encompass the mechanisms inherent to cloud chamber detectors.