Where should you handle projector bulbs?

• A. By the glass bulb
• B. By the cord
• C. By the porcelain base only
• D. By the metal base

Answer: (C)

Holding projector bulbs by the porcelain base only keeps your grip on the part designed to be handled and avoids contaminating the glass envelope. The glass portion is fragile and can crack or shatter if touched, and oils from skin on the glass can create hot spots during operation, shortening bulb life or causing failure. The porcelain base is heat-resistant and the proper grip point, while gripping the cord or metal base could damage components or isn’t safe. So, handle the bulb by the porcelain base only to protect both you and the bulb.