Compare the Total Copper Cross Sections in Terms of Current-Carrying

question 23

Multiple Choice

Compare the total copper cross sections in terms of current-carrying capacity for a single-phase system and a three-phase 120 V system with an effective load of 50 Ω.

• A) Single-phase 7.2 A; three-phase 4.8 A
• B) Single-phase 4.8 A; three-phase 2.4 A
• C) Single-phase 9.6 A; three-phase 14.4 A
• D) Single-phase 4.8 A; three-phase 0 A

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Definitions:

Fine-grained

Material having small, closely packed particles or crystals, often refers to sediments or rocks with such texture.

Clastic Rocks

Sedimentary rocks composed of fragments, or clasts, of pre-existing minerals and rocks that have been transported, deposited, and lithified.

Turbidity Current

A current in water or air that moves downward because it is more dense than the adjacent water or air, especially applied to a swift, bottom-flowing current of water and suspended sediment on the seafloor or the bottom of a lake.

Continental Shelf

A gently sloping, relatively shallow area of seafloor that flanks a continent and is underlain by thinned continental crust.