Explain the concept of safety margin in the design of structures.
What will be an ideal response?
Safety margin implies that the actual structure is stronger than that required to support the maximum loads to which the structure will be subjected. The greater the difference between (i) the strength of the "actual" structure, A, and (ii) that "required" to support the maximum expected loads, R, is the safety margin, expressed as the ratio of A and R.
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List four elements of the air-conditioning system that the total system control module must supervise.
What will be an ideal response?
The objectionable feature of iron and manganese in drinking water is
a. health hazard b. staining of plumbing fixtures c. mottled teeth d. scale deposits on plumbing fixtures e. none of the above
Examine a variety of trees. Look at different species and both young and old
trees. Do you see a pattern in which trees were eaten by the insects? Why do you think that this is so?
What will be an ideal response?When using a fire extinguisher, what word can be used to remember what to do?
A) FIRE B) RED C) PASS D) LEVER