Which pozzolanic material was used by the Romans to produce hydraulic cement for aqueducts?made of natural stone and mortar consisting of lime-sand mortar?
What will be an ideal response?
Volcanic ash.
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Unless otherwise noted, the calculations in AC circuits use _____.
a. peak values b. median values c. phase values d. rms values
A recently hired CEO (chief executive officer)wants to reduce future production costs to improve the company’s earnings, thereby increasing the value of the company’s stock. The plan is to invest $70,000 now and $50,000 in each of the next 2 years to improve productivity. By how much must annual costs decrease in years 3 through 10 to recover the investment plus a return of 15% per year?
What will be an ideal response?
What is the purpose of low ambient controls for air-cooled condensers?
A) To control the ambient temperature B) To maintain a maximum head pressure, even at lower-than-normal operating conditions C) To increase the fan speed to compensate for low barometric pressure D) To maintain a minimum head pressure, even at lower-than-normal operating conditions
Which of the following is not one of the options that define the imaginary mirror plane in the 3DMIRROR command?
a. Xaxis b. XY c. Zaxis d. 3points