Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an_______________?
Correct answer: D. Either B. or C.
- A. Chromel-alumel thermocouple
- B. Optical pyrometer
- C. Radiation pyrometer
- D. Either B. or C.
Explanation
Molten iron and slag are too hot for ordinary contact thermometers, so non-contact optical or radiation pyrometers are used. Therefore, either option B or C is defensible.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Process Control and Instrumentation
254 free Process Control and Instrumentation MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Process Control and Instrumentation questions
Which of the following is never used as an element of industrial resistance thermometer ?
Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is________________?
Hot wire anemometer is used for the measurement of___________________?
Conversion formula for converting amplitude ratio (AR) into decibels is ________________?
Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is __________________?
Stroboscope is used for the measurement of _________________?