Identify the odd man out

PERT is

For a given size of bucket, the ideal output of a dragline will be least in

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

Slack is given as the difference between

A project is

A dual role event

Which of the following is a dummy activity?

Which one of the following surfaces will give highest coefficient of traction while using crawler track tractors?