Question

For a certain thermocouple, if the temperature of the cold junction is $0^{\circ }C$, the neutral temperature and inversion temperatures are $285^{\circ }C$ and $570^{\circ }C$ respectively. If the cold junction is brought to $10^{\circ }C$ then the new neutral and inversion : temperatures are respectively

• A. $285^{\circ }C$ and $560^{\circ }C$
• B. $285^{\circ }C$ and $570^{\circ }C$
• C. $295^{\circ }C$ and $560^{\circ }C$
• D. $275^{\circ }C$ and $560^{\circ }C$

Answer 1

Answer: (A)

Neutral temperature remains same.
Inversion temperature, $T_i=2T_n-T_c$
$=2\times 285-10$
$=560^{\circ }C$