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Q: Which of the following devices is used to measure relatively high temperature such as are encountered in furnaces?
  • A. Bolometer
  • B. Pyrometer
  • C. Ammeter
  • D. Fluxmeter
Correct Answer: Option B - Pyrometer is an instrument used to measure high temperature, such as are encountered in furnances. When the temperature of an object is very high its temperature cannot be measured with a normal thermometer.
B. Pyrometer is an instrument used to measure high temperature, such as are encountered in furnances. When the temperature of an object is very high its temperature cannot be measured with a normal thermometer.

Explanations:

Pyrometer is an instrument used to measure high temperature, such as are encountered in furnances. When the temperature of an object is very high its temperature cannot be measured with a normal thermometer.