26. A thermocouple in a thermowell measures the temperature of hot gases flowing through the pipe. For the most accurate value, the thermowell should be made of –

A. steel

B. Brass

C. Aluminum

D. Copper

Click for Answer/Explanation

Correct Answer is A

Since k should be minimum and steel has the lowest (16 – 20 W/m²K)

  • For Brass – 100 W/m²K
  • For Cu = 380 W/m²K
  • For Al = 225 W/m²K

Read More- Welding Types and Definitions Notes

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