Refractory Technology High thermal conductivity of a refractory material is not important, when it is to be used in the Muffle furnace Coke oven regenarators Blast furnace Recuperators Muffle furnace Coke oven regenarators Blast furnace Recuperators ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dilatometer is used for the determination of __________ of refractories. RUL Resistance to CO attack Modulus of rupture Permanent linear change RUL Resistance to CO attack Modulus of rupture Permanent linear change ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C. 570 70 270 770 570 70 270 770 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Resistance to slag attack of a refractory Decreases at higher temperature All of these Depends on the nature of slag & refractory Decreases, if defective joints & cracks exist in the refractory Decreases at higher temperature All of these Depends on the nature of slag & refractory Decreases, if defective joints & cracks exist in the refractory ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increase in the density of silica refractories, its Resistance to slag attack increases Neither A nor B Spalling resistance reduces Both A & B Resistance to slag attack increases Neither A nor B Spalling resistance reduces Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology 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? Sand Saw dust Chemically prepared foam Cork Sand Saw dust Chemically prepared foam Cork ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS