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, $T_{i}=2 T_{n}-T_{c}$
$=2 \times 285-10$
$=560^{\circ} C$