Temperature of _____________ cannot be measured by an optical or radiation pyrometer?
Correct answer: C. Hot blast (air) from stoves
- A. Combustion space in boilers
- B. Molten slag flowing out of blast furnace
- C. Hot blast (air) from stoves
- D. Rotary limestone calcination kiln
Explanation
A radiation or optical pyrometer requires sufficient emitted radiation from the target, whereas hot air is essentially non-luminous and has weak, difficult-to-measure emission. Molten slag, flames, and hot kiln surfaces provide much stronger radiation signals.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
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
Platinum resistance thermometer can be used upto antimony point which is ____________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure?
Which of the following thermocouples has the least temperature measurement range ?
Radiation thermometer cannot measure the temperature ___________________?
Mercury thermometer can be used to measure the temperature upto ____________ °C?
Nitrogen gas constant volume thermometer is suitable for measuring a temperature of _____________ °C?
On-off control which is a special case of proportional control, has a band width of about _____________ percent?