NFPA Exam CFI-I Topic 1 Question 6 Discussion

Comprehensive and Detailed Step-by-Step Explanation:

Heat Detector Color Codes:

According to NFPA 72 (National Fire Alarm and Signaling Code), heat-sensing fire detectors are color-coded based on their temperature classification:

White: Ordinary (135F to 155F).

Green: Intermediate (175F to 225F).

Blue: High (250F to 300F).

Red: Extra high (325F to 375F).

Why Red is the Correct Answer:

Heat detectors classified as extra high operate at temperatures between 325F and 375F and are marked with a red color code.

Other Options Explained:

Option A (White): Ordinary temperature range.

Option B (Green): Intermediate temperature range.

Option C (Blue): High temperature range.

Summary:

The color of a heat-sensing fire detector with an extra high temperature classification is red.