Si percentage in silica refractories used in the walls of coke oven is about________?

Which is a basic refractory?

The ability of a material to absorb energy in the elastic range is a measure of its ________?

Which of the following is not an antibiotic?

For a given fluid, as the pipe diameter increases, the pumping cost ________?

In an isothermal process on an ideal gas, the pressure increases by 0.5 percent. The volume decreases by about ________ percent?