Q1: Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.

ANS:A - copper

1. Thermal Conductivity: Copper is known for its excellent thermal conductivity, which is one of the highest among common metals. This property allows copper to efficiently transfer heat from the hot gases to the thermocouple inserted in the thermal well. The high thermal conductivity of copper ensures that temperature measurements are accurate and responsive to changes in the temperature of the gases flowing in the pipe.
2. Corrosion Resistance: Copper also exhibits good resistance to corrosion, particularly in environments with hot gases. This corrosion resistance helps ensure the long-term integrity and reliability of the thermal well, as it is less susceptible to degradation due to exposure to corrosive gases.
3. Mechanical Strength: Copper possesses adequate mechanical strength to withstand the conditions inside the pipe and support the thermocouple. While copper may not be as strong as some other materials like steel, its mechanical properties are sufficient for this application.
4. Compatibility: Copper is compatible with many types of thermocouples and can provide reliable temperature measurements across a wide range of temperatures commonly encountered in industrial processes.