Related Questions

Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.
A Copper
B Steel
C Aluminium
D Brass
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 thermocouples has the widest temperature measurement range?
A Iron-constantan
B Chromel-alumel
C Copper-constantan
D Platinum-platinum/rhodium
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 of the above
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 has the least temperature measurement range?
A Copper-constantan
B Chromel-alumel
C Platinum-platinum/rhodium
D Iron-constantan
For platinum thermocouples, lead wires are made of
A Copper & copper-nickel alloys
B Copper & iron
C Iron & nickel
D Tin & nickel
__________ is not used as a material of construction in thermocouples.
A Alumel
B Rhodium
C Constantan
D Duralumin
__________ is undesirable in thermocouples used in industries,
A Linear relation of emf to temperature
B Corrosion resistance
C Oxidation resistance
D Non-linear relation of emf to temperature

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