Silicon percentage in iron castings to have maximum hardness should be about________?

Steady state equimolal counter diffusion is encountered in________?

Potential flow is characterised by the________?

Chloramines are used in water treatment for________?

Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants?

In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is________?