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PROCESS CONTROL AND INSTRUMENTATION

Process Control and Instrumentation
Which of the following temperature measuring instruments need not touch the object whose temperature is being measured?

Mercury in glass thermometer
Filled system thermometer
Radiation/infrared pyrometer
Thermo electric pyrometer

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Process Control and Instrumentation
Emf developed by a thermocouple while measuring a temperature of 400°C is 22 mV. The type of thermocouple used is

Platinum-rhodium
Chromel-alumel
Platinum-platinum+rhyodium
Iron-constantan

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Process Control and Instrumentation
Platinum resistance thermometer is the international standard for temperature measurement between

13.81°K to 903.9°K
Both A and B
Neither A nor B
Triple point of hydrogen and freezing point of antimony

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Process Control and Instrumentation
Which of the following thermocouples has the widest temperature measurement range?

Platinum-platinum/rhodium
Iron-constantan
Chromel-alumel
Copper-constantan

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Process Control and Instrumentation
Mercury thermometer can be used to measure the temperature upto __________ °C.

350
750
250
100

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