Which of the following is not a nickel based alloy?

Lead pipe is________?

In a rotary drier, the average retention time of solid is (where Z = length of the drier, metres ρ = apparent solid density, kg/m3 L = flow rate of dry solids, kg/see. m2 drier crosssection H = hold up of solid.)?

Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be________?

In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to________?

Reforming________?