What is the full weight per 50-foot section of 1¾ inch hose?

• A. 74 pounds
• B. 60 pounds
• C. 82 pounds
• D. 70 pounds

Answer: (A)

When a hose section is considered full, its weight comes from two parts: the hose itself (dry weight) and the water inside. For a 50-foot length of 1¾-inch hose, the inner diameter is 1.75 inches, so the radius is 0.875 inches. Convert to feet (0.875 ÷ 12 ≈ 0.073 ft). The cross-sectional area is πr^2 ≈ π × (0.073)^2 ≈ 0.0167 ft^2. The volume of water in 50 feet is area × length ≈ 0.0167 × 50 ≈ 0.835 ft³. Water weighs about 62.4 lb/ft³, so the water inside weighs about 0.835 × 62.4 ≈ 52 lb.

The dry weight of a 50-foot length of this hose is typically around 22 lb. Adding dry weight and water weight gives 52 + 22 ≈ 74 lb for a full 50-foot section.

So the full weight is about 74 pounds. The other numbers would come from either not including the water or using a different assumption for the dry weight or volume.