PCN Infrared Thermography Category 2 Practice Questions - BINDT PCN Infrared Thermography Category 2 (ISO 18436-7) Exam

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During an outdoor electrical thermographic inspection, wind speed increases from 1 m/s (breeze) to 5 m/s. What effect does this have on observed electrical anomaly surface temperatures?

Apparent surface temperature of the hotspot decreases significantly due to forced convection Apparent surface temperature of the hotspot increases due to friction heating Surface temperature remains unchanged because internal resistance heating is constant Hotspot emissivity increases, masking true temperature

Correct Answer:

Apparent surface temperature of the hotspot decreases significantly due to forced convection

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