Certified Facility Manager (CFM) Practice Exam

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Prepare for the Certified Facility Manager (CFM) Exam. Review vital concepts with multiple choice questions, detailed explanations, and smart study materials. Access your path to certification success!

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Which type of electric discharge lamp is the most commonly used?

Halogen
Fluorescent
LED
Xenon

The correct answer is: Fluorescent

Fluorescent lamps are widely recognized for their efficiency and versatility, making them the most commonly used type of electric discharge lamp. They operate by passing an electric current through mercury vapor, which produces ultraviolet light that then excites a phosphor coating on the inside of the lamp, emitting visible light. Fluorescent lamps are favored in many applications, including commercial and residential settings, because of their ability to deliver bright illumination while consuming less energy compared to traditional incandescent bulbs. They also have a longer lifespan, which adds to their economic appeal. While LEDs have gained popularity due to their energy efficiency and long life, the question specifically revolves around electric discharge lamps, wherein fluorescent options still hold a significant share in terms of usage across various applications. Halogen and xenon lamps, while relevant for specific tasks, do not have the same broad application and prevalence as fluorescent lamps.