Most telecommunications systems operate on DC circuitry. Why?
A) DC is safer than AC.
B) DC devices are more sensitive than AC.
C) DC devices are much less expensive.
B) DC devices are more sensitive than AC.
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PROBLEM 2.13
Rod BD is made of steel and is used to brace the axially compressed member ABC. The maximum force that can be developed in member BD is 0.02P. If the stress must not exceed 18 ksi and the maximum change in length of BD must not exceed 0.001 times the length of ABC, determine the smallest-diameter rod that can be used for member BD.
Which statement below regarding airborne asbestos is correct?
A) Large and small asbestos particles must all be disposed of as hazardous waste. B) HEPA filter vacuums are not sufficient to prevent airborne asbestos contamination. C) It is easy to tell which friction materials will produce asbestos dust. D) The EPA requires that asbestos materials be "wetted" to prevent airborne particles.
Once an interview has been granted, the employer will want to see ____.
A. your notebook with engineer's sketches B. one example of an engineering drawing you produced C. one example of a section drawings you created D. your portfolio of drawings
Alternative energy sources include _____
A) coal B) petroleum C) nuclear energy D) natural gas