Which type of duct material has a high level of friction to air flow?

A. galvanized metal
B. fiberglass-wrapped, spiral duct (flexible duct)
C. fiberglass, fiberboard sheeting
D. round sheet metal


Answer: B

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The profit maximizing combination of two products to produce is found

A) Where the marginal physical products of the two products is equal. B) Where the iso-revenue line intersects the production possibilities curve. C) Where the iso-revenue line is tangent to the production possibilities curve. D) Where the percentage change in the prices of the two products is equal.

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For tasks that are unfamiliar to the estimator, there may be no historical figures to draw on; therefore, she must be very cautious

Indicate whether the statement is true or false

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If two mutually exclusive alternatives have B/C ratios of 1.5 and 1.4 for the lower first-cost and higher first-cost alternatives, respectively: (choose one)

(a) The B/C ratio on the increment between them is greater than 1.4 (b) The B/C ratio on the increment between them is between 1.4 and 1.5 (c) The B/C ratio on the increment between them is less than 1.4 (d) The lower-cost alternative is the better one

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If an open flame is near a type 3 rating, the refrigerant:

A) Will condense. B) Will slowly burn. C) Will not ignite at all. D) Will support combustion.

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