Thermal wells are used in the temperature measurement to____________________?
Correct answer: A. Guard against corrosive and oxidising action on thermocouple materials
- A. Guard against corrosive and oxidising action on thermocouple materials
- B. Reduce measuring lag
- C. Increase the fidelity
- D. Increase the sensitivity
Explanation
A thermal well places a protective barrier between the temperature sensor and the process fluid, guarding it against corrosion, oxidation, pressure, and mechanical damage. It does add some response lag rather than reducing it.
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
Feed forward controller accounts for the ______________ changes?
The open loop transfer function of a process is K [{(s + 1) (s + 4)}/{(s + 2) (s + 3)}]. In the root locus diagram, the poles will be at ___________________?
Accurate temperature measurement performance of a radiation pyrometer cannot be affected, if the ?
A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is______________?
Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C ?
What is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple ?