Which device is used to generate auxiliary electrical power and is powered by gasoline or diesel engines?

• A. GFCI
• B. Generator
• C. Ground gradient meter
• D. Cold Zone system

Answer: (B)

The device used to generate auxiliary electrical power powered by gasoline or diesel engines is a generator. It converts the mechanical energy from a gasoline or diesel engine (the prime mover) into electrical energy, providing portable or standby power when the main power supply isn’t available. This is essential on a fire scene or in drills for running lights, fans, pumps, charging tools, and other equipment.

The other options don’t fit because they serve different roles. A GFCI is a protective device that detects ground faults and interrupts current to prevent shock, not a power source. A ground gradient meter measures electrical grounding properties or soil resistance, not something that generates electricity. A Cold Zone system isn’t a power generator; it relates to safety zones or cooling/environmental controls, not providing electrical power.