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
Related Mcqs:
- 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 - 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 - 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 - 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. - Which of the following relates the emf. generated in a single homogeneous wire to the temperature difference ?
A. Peltier effect
B. Thomson effect
C. Seebeck effect
D. None of these - The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C?
A. 250
B. 500
C. 750D. 1000
- The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an _____________ thermocouple?
A. Chromel-alumel
B. Iron-constantan
C. Platinum-platinum/rhodium
D. None of these - Out of the following thermocouple wire insulating material, the highest temperature rating is for________________?
A. Teflon
B. Ceramic fibre
C. Asbestos
D. Fibre glass - 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 - The thermal emf-temperature relationship of most thermocouples is_________________?
A. Linear
B. Parabolic
C. Exponential
D. Square root
