Presence of nickel in steel improves its________?

Trap is used to remove ________ from steam pipe lines?

________ substances present in sewage are removed in grit chamber during sewage treatment?

Dry air is a mixture of________?

Euler’s equation of motion states, that at every point, the________?

In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is ________ the outlet temperature of the cold fluid?