How long is a flexible discharge hose?

• A. One meter
• B. Half an inch
• C. Three inches
• D. Two feet

Answer: (B)

In hose sizing, the important thing is diameter, not length. Flexible discharge hoses are specified by their inner diameter because that determines fit and flow with pumps and fittings. A measurement of half an inch tells you the hose’s bore, not how long the hose is. The length can vary with the setup, so it isn’t a fixed or standard value. That’s why, in this context, a half-inch hose is the dimension you’re expected to identify, even though the question phrasing asks about length. The other options list lengths (meters or feet) rather than the actual hose size, which is why they’re not the correct cue here.