What is the one of the most popular and commonly used conductor?
a. plastic
b. copper
c. mercury
d. glass
b. copper
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A(n) __________ receives the heat energy radiated from an object and converts the heat to an electrical potential.
A. infra-red sensor B. thermo-sensor C. pyrotechnical sensor D. photovoltaic sensor
On a stud wall, the stucco is applied in three coats: scratch coat, brown coat and finish coat. In the scratch coat, the coated surface is scratched with a scratching tool. What is the purpose of scratches, and are the scratch lines horizontal, vertical, diagonal, or some other orientation?
What will be an ideal response?
The National Fuel Gas Code category of vent system used with a natural draft furnace is _____.
a. Category I b. Category II c. Category III d. Category IV
Installing nail-on device boxes, panelboards, and lighting fixtures in new houses are tasks performed by _____.
a. commercial electricians b. electrical maintenance technicians c. industrial electricians d. residential electricians