The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an _____________ thermocouple?

Related Mcqs:

1. The calibration data of a thermocouple with its cold junction at 0°C are given below. The hot junction of the thermocouple is placed in a bath at 80°C, while its cold junction is at 20°C. What is the emf of thermocouple ?

   A. 3.26 mv B. 0.80 mv C. 2.46 mv D. 2.43 mv...

2. Emf developed by a thermocouple while measuring a temperature of 400°C is 22 mV. The type of thermocouple used is ___________________?

   A. Chromel-alumel B. Iron-constantan C. Platinum-rhodium D. Platinum-platinum + rhodium...

3. Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is________________?

   A. Chromel-alumel B. Iron-constantan C. Platinum-platinum + rhodium D. None of these...

4. Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is_______________?

   A. Chromel-alumel B. Iron-constantan C. Platinum-platinum + rhodium D. Either A., B. or C....

5. Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by _____________ effect?

   A. Peltier B. Thomson C. Seebeck D. None of these...

6. Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit ?

   A. Seebeck effect B. Peltier effect C. Joule heating effect D. Thomson effect...

7. Emf generated in a thermocouple depends on the temperature ___________________?

   A. Of cold junction only B. Of hot junction only C. Difference between hot and cold junctions D. Difference between cold junction and atmospheric temperature...

8. The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C?

   A. 250 B. 500 C. 750 D. 1000...

9. Out of the following thermocouple wire insulating material, the highest temperature rating is for________________?

   A. Teflon B. Ceramic fibre C. Asbestos D. Fibre glass...

10. Which thermocouple can be used to measure a temperature of around 1400°C ?

    A. Copper-constantan B. Aluminium-Chromel C. Platinum-platinum + rhodium D. None of these...