Materials that are made from atoms containing seven or eight valence electrons are known as ____.
a. insulators
b. conductors
c. semiconductors
d. attractors
b. conductors
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_____ are crosspieces of heavy timber or steel beam, one end of which rests in a hole left in the wall, with the other end resting on solid ground or on a suitable base.
A. Braces B. Putlogs C. Plankings D. Brackets
What is the name for the period of time that an object will be in use and retain its effectiveness?
A. sustainable period B. lifespan C. final age D. life cycle
Which of the following is a government agency that may conduct on-site investigations to determine the toxicity of materials used in workplaces?
a. NAVFAC b. FHWA c. CDC d. NIOSH
A remote keyless control stops working. Technician A says that the battery in the remote could be dead. Technician B says the key fob may have to be resynchronized. Who is right?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician