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What shade filter plate (or eye protection) is needed when observing submerged arc welding at 1000 amperes?

A. No 14 filter
B. No 12 filter
C. No 10 filter
D. No 4 filter
E. Clear safety goggles or safety glasses

Answer :

Final answer:

A shade filter plate of No 14 is needed when observing submerged arc welding at 1000 amperes to protect the eyes from intense light and radiation.

Explanation:

When observing submerged arc welding at 1000 amperes, a shade filter plate of No 14 is needed for eye protection. This is because submerged arc welding produces intense light and radiation, including infrared and ultraviolet radiation. The No 14 shade filter plate is specifically designed to block out harmful radiation and protect the eyes from damage.

Example: Imagine looking directly at a very bright light bulb - it can be uncomfortable and potentially harmful to your eyes. In the case of submerged arc welding at 1000 amperes, the intensity of the light and radiation is even greater. Therefore, it is crucial to use a No 14 shade filter plate or equivalent protection to ensure safety.

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