Describe sick building syndrome and how it can come about with modern construction methods
What will be an ideal response?
In order to conserve energy and costs, construction techniques and materials have been developed that
keep heat energy inside during the winter and keep cool air within buildings during the summer. Wellsealed
buildings are energy-efficient and do not allow for much air exchange with the outdoors. What
makes the lack of air exchange a problem is that concentrations of potentially harmful airborne
chemical are constantly introduced into indoor air. These chemicals are called volatile organic
compounds (VOCs) and are emitted from numerous products including those used to furnish interiors
and those found in office products.
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Which of the following is the distance from the center of the circle to its outer edge or half the diameter?
a. circumference b. radius c. volume d. area of a circle
Which of the following statements is false?
A. The fugacity coefficient of component i in one liquid phase must be equal to the fugacity coefficient of component i in the other liquid phase at equilibrium. B. The LLE curve, especially at low pressures, varies little with pressure. C. Some systems can possess both a UCST and an LCST. D. The region where a liquid mixture exhibits LLE is called the miscibility gap. E. None of the above are false.
The thread pitch of a bolt is measured in what units?
A) Threads per inch B) Millimeters C) Fractions of an inch D) Both A and B can be correct
The work center in the footstock:
A) May be live or dead, depending on the work type B) Drives the workpiece C) Is always a dead center D) Is always live