Thermal conductivity of refractory bricks_________________?
Correct answer: D. Increases with decrease in porosity
- A. Increases with the amount of air entrapped in pores
- B. Decreases with decreases in porosity
- C. Is independent of its porosity and is maximum for insulating bricks
- D. Increases with decrease in porosity
Explanation
Solid refractory material conducts heat much better than the air trapped in its pores, so reducing porosity generally increases thermal conductivity. This is why highly porous bricks are preferred as insulating refractories.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Chemical Process Principles
2,710 free Chemical Process Principles 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 Chemical Process Principles questions
Which form of silica has the highest specific gravity ?
Fireclay bricks are not used in the_____________________?
Permeability of bricks is a measure of the_________________?
Fusion point of a basic refractory material is__________________?
Which is an acidic refractory ?
In panel test for spalling resistance, the average face temperature of panel assembly is maintained at ______________ °C for 24 hours?