A. Platinum-platinum + rhodium
B. Chromel-Alumel
C. Iron-constantan
D. Copper-constantan
Related Mcqs:
- Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere ?
A. Platinum-platinum + rhodium
B. Iron-constantan
C. Copper-constantan
D. Chromel-alumel - Thermal well made of _____________ gives the fastest speed of response, while measuring temperature by thermocouples?
A. Steel
B. Vycor (a glass)
C. Nichrome
D. Inconel - Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury?
A. 250
B. 350
C. 550
D. 700 - Which of the following thermocouples has the least temperature measurement range ?
A. Copper-constantan
B. Chromel-alumel
C. Platinum-platinum/rhodium
D. Iron-constantan - Which of the following thermocouples can measure the maximum temperature ?
A. Platinum-rhodium
B. Tungsten-molybdenum
C. Chromel-alumel
D. Iron-constantan - Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature ?
A. Platinum-platinum + rhodium
B. Iron-constantan
C. Chromel-constantan
D. All will give the same output - Which of the following thermocouples has the widest temperature measurement range ?
A. Iron-constantan
B. Chromel-alumel
C. Copper-constantan
D. Platinum-platinum/rhodium - The thermal emf-temperature relationship of most thermocouples is_________________?
A. Linear
B. Parabolic
C. Exponential
D. Square root - All the thermocouples used for temperature measurement use dissimilar metal ________________?
A. Strips
B. Bars
C. Wires
D. Beads - Which of the following temperature measuring instruments need not touch the object whose temperature is being measured ?
A. Radiation/infrared pyrometer
B. Filled system thermometer
C. Mercury in glass thermometer
D. Thermo electric pyrometer
