Answer the following statement(s) true (T) or false (F)
1.Overhead service conductors are permitted to be attached to trees for support.
2.Outdoor light fixtures are permitted to be attached to trees.
3.A metal underground water pipe in contact with the earth for 10 feet or more is permitted to be the only grounding electrode needed to meet NEC® requirements.
4.The enclosure housing a temporary service entrance disconnecting means must be dust-tight.
5.If a single grounding electrode that is a rod, pipe, or plate does not have resistance to earth of 25 ohms or less, an additional electrode must be installed.
1.false
2.true
3.false
4.false
5.true
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Light-emitting diodes (LEDs) are among the most common devices found in the electrical/electronics field.
Answer the following statement true (T) or false (F)
Excessive draft through the flue vent may cause _____.
a. higher combustion efficiency b. soot formation c. lower combustion efficiency d. furnace short cycling
An engineering student has only 45 minutes before the final exam in her Engineering Economy class. She needs help in understanding cost-effectiveness analysis because she knows from the instructor’s review session that a CEA problem will be on the exam. There is time for using only one method of assistance before the exam; she must select well. In a rapid process of estimation, she determines how many minutes it would take for each method of assistance and how many points it might gain for her on the final. The method and estimates follow. Where should she seek help to be most effective?
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List three general construction hazards not associated with electricity.____________________________________________________________________________________________________________
What will be an ideal response?