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Addition of grog in fireclay brick during its manufacture is advantageous, because it results in
With increase in the porosity, thermal spalling resistance of fireclay brick
The solid brick shown is made of small square shaped bricks of side 1. when the large brick is disassembled into its component small bricks. the total surface area of all the small bricks is how much greater than the surface area of the large brick?
The method of moving each brick through a small horizontal distance before it is finally laid in any brick wall and pressing it by means of brick hammer, is known as
Addition of stabiliser during PVC manufacture is done to
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?
Maximum safe working temperature for fireclay bricks is about __________ °C.
Fireclay bricks is not used for lining the
Colour of fireclay bricks is
Porosity of fireclay refractories is __________ percent.