A. Optical pyrometer
B. Radiation pyrometer
C. Photoelectric pyrometer
D. Thermocouples
Related Mcqs:
- Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an _____________ pyrometer?
A. Radiation
B. Optical
C. Photoelectric
D. None of these - 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 - For measuring the temperature of a red hot furnace, which is the most suitable instrument ?
A. Platinum resistance thermometer
B. Thermocouple
C. Optical pyrometer
D. Bimetallic thermometer - Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C ?
A. Mercury thermometer
B. Bimetallic thermometer
C. Radiation pyrometer
D. None of these - 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 - 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 - 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 - Which of the following cannot measure a temperature of 1600°C ?
A. Platinum resistance thermometer
B. Thermocouple
C. Photo-electric pyrometer
D. Radiation pyrometer - Nitrogen gas constant volume thermometer is suitable for measuring a temperature of _____________ °C?
A. 0-100
B. < 0
C. > 100
D. > 50 - Photoelectric pyrometers are suitable in the temperature range of ________________ °C?
A. 400-1600
B. 800-1600
C. 800-2500
D. 400-1000
