NALMCO Certified Apprentice Lighting Technician (CALT) Practice Exam

What is a common characteristic of rough service lamps?

1. They have higher color temperature

2. They are designed for increased vibration resistance

3. They consume less energy

4. They are larger in size

The correct answer is: They are designed for increased vibration resistance

Rough service lamps are specifically designed to withstand challenging conditions, including increased vibrations and physical impacts. This makes them ideal for environments such as industrial settings or outdoor locations, where regular light bulbs may fail due to movement or shock. The construction of rough service lamps typically incorporates a thicker filament and additional protective features that enhance their durability compared to standard light bulbs. In contrast, the other options do not accurately represent the characteristics of rough service lamps. For instance, while some rough service lamps may have specific color temperatures, the defining feature is their construction for vibration resistance rather than their color temperature. Similarly, energy consumption can vary among different types of bulbs, and size typically depends on the design rather than a specific trait of rough service lamps. Overall, the primary aspect that sets these lamps apart is their ability to perform reliably in less than ideal conditions, highlighting the importance of increased vibration resistance.