How many DC Buses are named with 'DC' in their title?

• A. 7
• B. 8
• C. 9
• D. 10

Answer: (C)

The main idea here is to count every item whose title includes the DC designation. In the electrical diagram or list provided, the DC buses are labeled in a simple, numbered sequence: DC BUS 1, DC BUS 2, DC BUS 3, DC BUS 4, DC BUS 5, DC BUS 6, DC BUS 7, DC BUS 8, and DC BUS 9. Each one contains the term “DC,” so you tally all of them. That gives you nine such entries in total, which is why the correct choice reflects the number nine. This kind of question tests your ability to read and count labeled components in a schematic, not your keenness about electrical theory. If you only found eight or ten, you’d be missing one of the labeled DC buses or counting an item that isn’t a DC bus, respectively.