The addition of silica fume in concrete mainly reduces

The resistance of cement concrete to sulphate attack increases with

In project crashing, the least economical activity to crash is the one with

The storage coefficient of a confined aquifer is mainly governed by

A contour map showing concentric closed contours with decreasing values inward represents

In a continuous beam, redistribution of moments is possible because of

The principal cause of plastic shrinkage cracking in concrete is

In PERT analysis, the expected time of an activity is calculated using

Extended aeration process is mainly preferred when

In precise leveling, the effect of collimation error is eliminated by

In stiffness method, joint equilibrium equations are written in terms of

Carbonation depth in concrete increases with

The concept of event slack is applicable only when

Break-point chlorination refers to

Local attraction in compass surveying can be detected when

In the principle of virtual work, compatibility is satisfied because