An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture ?
Correct answer: C. Sand
- A. Cork
- B. Saw dust
- C. Sand
- D. Chemically prepared foam
Explanation
Cork, sawdust, and chemically generated foam create pores that remain after firing or decomposition. Sand is a relatively dense, noncombustible filler and does not induce the desired porosity.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
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.
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 property of refractories is the most important for top section of the blast furnace ?
In the reaction, Ca + 2H2O = Ca(OH)2 + H2; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water ? (Atomic weight of calcium = 40) ?
Dissolving a solute in a solvent does not change its________________?
Hot metal runner in blast furnace are lined with ______________ bricks?
Pick out the correct conversion?
The number of H+ in 1 c.c solution of pH 13 is__________________?