Which letter corresponds to Water/Sewage?

• A. Compartment V
• B. Compartment W
• C. Compartment L
• D. Compartment M

Answer: (B)

Think in how the labeling is used: each compartment is tagged with a letter that signals which system it serves. Water and Sewage is designated by the letter that matches Water’s initial, so the compartment labeled with W is the one for Water/Sewage. The other letters correspond to different systems, so they don’t fit Water/Sewage. That’s why the compartment with W is the correct match.