Chemical Engineering Mcqs

With increase in the alumina content in firebricks, its fusion point (refractoriness) ?

(A) Decreases linearly
(B) Remains unchanged
(C) Increases
(D) Decreases

Submitted By :Ali Uppal

Refractoriness of a typical silica brick corresponds to Segar cone number, ’32’, which is equivalent to a temperature of _____________ °C?

(A) 1380
(B) 1520
(C) 1710
(D) 1915

Submitted By :Ali Uppal

Except _____________, all other refractories are bad conductors of electricity (i.e, have low electrical conductivity)?

(A) Fireclay
(B) Carborundum
(C) Graphite
(D) Chromite

Submitted By :Ali Uppal

Grog__________________?

(A) Contains both alumina and silica
(B) Is crushed firebrick
(C) Is a non-plastic material
(D) All

Submitted By :Ali Uppal

Which of the following is not an acidic refractory?

(A) Silica bricks
(B) Fireclay bricks
(C) Bauxite bricks
(D) Magnesia bricks

Submitted By :Ali Uppal

Firing temperature of magnesite bricks is about _____________ °C?

(A) 800-1000
(B) 1000-1200
(C) 1600-1800
(D) 2400-2600

Submitted By :Ali Uppal

Pyrometric cone equivalent (PCE) value (Segar cone) of ‘Superduty refractories’ is more than 33 which corresponds to a temperature of _____________ °C?

(A) 1520
(B) 1630
(C) 1670
(D) 1730

Submitted By :Ali Uppal

High thermal conductivity of a refractory material is not important, when it is to be used in the______________________?

(A) Coke oven regenerators
(B) Muffle furnace
(C) Blast furnace
(D) Recuperators

Submitted By :Ali Uppal

Magnesite bricks are used in those parts of furnaces, which are __________________?

(A) Subjected to temperature fluctuation
(B) Required to resist corrosive basic slag
(C) Subjected to high load
(D) None of these

Submitted By :Ali Uppal

Fireclay bricks are never used in the______________?

(A) Beehive oven
(B) Coke oven walls
(C) Zinc roaster
(D) Lead blast furnace

Submitted By :Ali Uppal

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