F.1. Which of the following terms does not describe one of the uses of an MR lamp? A. Display lighting B. A narrow spot C. An extra wide flood D. Accent lighting F.2. If you operate a 130 V lamp in a 120 V service, the lamp life will A. immediately be terminated. B. increase. C. stay the same. D. decrease. F.3. Which of the following lamps does not require a ballast to operate? A. A mercury lamp B. An incandescent lamp C. A metal halide lamp D. A high-pressure sodium lamp

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Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.