What is indicated by gradual blackening at...

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Question 1 of 2066636eed28f7522a1c51d6c5

What is indicated by gradual blackening at the ends of component "4" shown in figures "B" and "C" of the illustration? Illustration EL-0081

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Question 1 of 20

66636eed28f7522a1c51d6c5

What is indicated by gradual blackening at the ends of component "4" shown in figures "B" and "C" of the illustration? Illustration EL-0081

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🔍 Key Concepts

• Component 4 is the glass tube of a fluorescent lamp containing mercury vapor and phosphor coating. • Blackening at the tube ends relates to the cathodes (filaments) and electron emission inside the lamp. • Consider how normal aging of a fluorescent tube looks compared with damage from excessive current or voltage.

💭 Think About

• Look at figures B and C: does any other component symbol suggest an over‑current or over‑voltage fault, or is the circuit drawn as a normal operating ballast circuit? • In real life, what visual change do you typically see in older fluorescent tubes near the electrode ends, even when the ballast and voltage are correct? • Which option describes a condition that would be progressive and gradual, rather than an immediate or catastrophic failure?.

✅ Before You Answer

• Match the term "gradual" in the question with the choice that best fits a slow, normal degradation process. • Think about whether high current or high voltage would more likely cause sudden failure, flicker, or open filaments rather than slow darkening. • Eliminate any options that describe an immediate danger to personnel or equipment if the light were still operating normally in the drawing.

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Question 1 of 2066636eed28f7522a1c51d6c5

What is indicated by gradual blackening at the ends of component "4" shown in figures "B" and "C" of the illustration? Illustration EL-0081

Back

Question 1 of 20

66636eed28f7522a1c51d6c5

What is indicated by gradual blackening at the ends of component "4" shown in figures "B" and "C" of the illustration? Illustration EL-0081

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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