Engineering Economics
Pick up the main purpose of project cost control from the following:

To promote cost consciousness
To provide a feed back to the estimator
To signal immediate warning of uneconomic operations
All of these

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Engineering Economics
In a cash-flow diagram:

All of these
Time 0 is considered to be the present
Time 1 is considered to be the end of time period 1
A vertical arrow pointing up indicates a positive cash flow

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