Engineering Economics
The more critical (or severe) test of the firm's liquidity can be judged by:

Debts ratio
Liquidity ratio
Current ratio
Acid-Test (or Quick) ratio

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Engineering Economics
Pick up the correct reason for making conceptual (or preliminary) estimate from the following:

All of these
To compute target estimate for the owner while drawing and specifications are in initial stage
To have a check on a definitive cost estimate
To check quotations from contractors and/or sub-contractors

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Engineering Economics
Perfect monopoly exists only if:

the single vendor is the only one who has the knowledge of the product
the single vendor can prevent the entry of all other vendors in the market
the single vendor is the only one who has the permit to sell
the single vendor gets the absolute franchise of the product

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