New York State Master Electrician Practice Exam

Which of the following is not part of the classification of an incandescent lamp?

1. Wattage

2. Shape of the bulb

3. Type of filament

4. Size of the bulb

The correct answer is: Size of the bulb

The classification of an incandescent lamp typically includes factors that describe its performance, functionality, and design characteristics. Wattage is a vital classification as it indicates the energy consumption and brightness level of the lamp. The shape of the bulb is also a significant classification factor, as it affects the lamp's application, how it fits in fixtures, and aesthetic appeal. The type of filament plays a crucial role in determining how the lamp operates and its efficiency. When it comes to the size of the bulb, while it can influence the selection for specific fixtures, it is not typically classified as a fundamental category in describing the lamp’s operation, effectiveness, or overall functionality. Thus, size does not fit into the core classification criteria for incandescent lamps compared to the other options provided, which directly relate to performance characteristics and design that impact the user experience.