Temperature measurement by optical pyrometer is done above ____________ point, which is 1063°C ?
Correct answer: B. Gold
- A. Antimony
- B. Gold
- C. Silver
- D. Nickel
Explanation
An optical pyrometer is generally used above the gold point, approximately 1063°C, where contact thermometers become unsuitable. Thus, gold is the relevant fixed-point reference.
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