Engineering Economics
What is a stock of a product which is held by a trade body or government as a means of regulating the price of that product?

Hoard stock
Withheld stock
Stock pile
Buffer stock

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Engineering Economics
The key to profitable operation for project cost control, is:

To keep the project cost equal to original cost estimate
To keep the project cost equal to subsequent construction budget
To keep the project cost within the cost budget and knowing when and where job costs are deviating
None of these

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Engineering Economics
In a cash-flow diagram:

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

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