@⇒ Refractory Technology ⇒ Chemical Engineering Multiple Choice Questions / Objective type questions, MCQ's, with question and answers, download free PDF, short cut notes, rapid fire notes, best theory

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Q1.	RUL of refractories depends on the
A.	chemical composition. [Wrong Answer]
B.	physical structure. [Wrong Answer]
C.	presence of impurities like iron & alkali. [Wrong Answer]
D.	all (a), (b) and (c). [Correct Answer]
View Answer 6 -2 Explanation:- Answer : D Discuss it below : Click here for more comments


Q2.	Which is not a basic refractory ?
A.	Chrome magnesite [Wrong Answer]
B.	Magnesite [Wrong Answer]
C.	Dolomite [Wrong Answer]
D.	Silicon carbide [Correct Answer]
View Answer 6 -4 Explanation:- Answer : D Discuss it below : Click here for more comments


Q3.	High porosity refractory bricks have
A.	poor resistance to the peneration of molten slag, metal & flue gases. [Wrong Answer]
B.	poor heat conductivity & low strength. [Wrong Answer]
C.	better thermal spalling resistance. [Wrong Answer]
D.	all (a), (b) and (c). [Correct Answer]
View Answer 4 -1 Explanation:- Answer : D Discuss it below : Click here for more comments


Q4.	Walls, roofs & combustion chambers of annealing furnaces are made of __________ bricks.
A.	high duty fireclay [Correct Answer]
B.	silica [Wrong Answer]
C.	mullite [Wrong Answer]
D.	carborundum [Wrong Answer]
View Answer 4 -1 Explanation:- Answer : A Discuss it below : Click here for more comments


Q5.	The linear thermal expansion of __________ bricks upto 1000 °C is very low of the order of ≤ 0.5 percent.
A.	fireclay [Correct Answer]
B.	silica [Wrong Answer]
C.	magnesite [Wrong Answer]
D.	corundum [Wrong Answer]
View Answer 4 -1 Explanation:- Answer : A Discuss it below : Click here for more comments

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