Q. Refractories are dried in the

View solution

Q. Cermets are combination of ceramic and metallic materials due to which they have high strength & resistance to high temperature. Cermets are used in the

View solution

Q. Hot metal runner in blast furnace are lined with __________ bricks.

View solution

Q. Spray test determines the __________ of refractories.

View solution

Q. Thermal diffusivity of a refractory brick is high, when its __________ is high.

View solution

Q. High porosity refractory bricks have

View solution

Q. Vacuum steel degassing units are lined with

View solution

Q. Pyrometric cone equivalent (PCE) value (Segar cone) of 'superduty refractories' is more than 33 which corresponds to a temperature of __________ °C.

View solution

Q. Which is the stable form of silica below 870°C ?

View solution

Q. Capacity of a refractory brick to withstand-sudden changes in temperature is denoted by the property called

View solution

Q. Magnesite bricks are used in those parts of furnaces, which are

View solution

Q. Which is not a basic refractory ?

View solution

Q. Thoria

View solution

Q. Which property of refractories is the most important for top section of the blast furnace?

View solution

Q. Which one expands on heating ?

View solution

Q. Refractoriness/fusion points of 'superduty' refractories is __________ °C.

View solution

Q. Outer combustion chamber of blast furnace stove is lined with __________ bricks.

View solution

Q. Presence of MgO in alumino-silicate refractories __________ its refractoriness.

View solution

Q. Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C.

View solution

Q. With increase in the alumina content, the refractoriness of high alumina refractories

View solution