21.Updating may result in

22.The reduction in project time normally results in

23.Economic saving of time results by crashing

24.Consider the following statements for a power shovel: (i) Output can be increased by reducing the angle of swing for a given depth of cut. (ii) For a given angle of swing, output will be maximum at optimum depth of cut. (iii) Output can be increased by keeping the depth of cut less than optimum depth, (iv) Output can be increased by increasing the size of shovel. Of these statements

25.For which of the following materials, the output of power shovels for a fixed shovel size will be maximum