Heat Detection | MCQs

Explanation

Electric fire alarms often use the principle of expansion, where materials expand when heated due to a fire, triggering the alarm.

As the temperature rises during a fire, the metal or bimetallic strips in the alarm expand, activating the electrical circuit to sound the alarm.

Explanation

A heat detector is used for finding fires by detecting significant increases in temperature

Types:

Some heat detectors respond to a rapid temperature increase ("rate-of-rise"),

While others activate when a specific temperature is reached ("fixed temperature").