Which feature is used to drain kitchen wastes in soakage pits?

• A. Insecticides
• B. Grease trap
• C. Chlorine solution
• D. Heat treatment

Answer: (B)

The main idea is using a grease trap to separate fats, oils, and grease from kitchen wastewater before it reaches a soakage pit. In kitchens, greases float to the surface while the clearer water continues on toward the drainage system. A grease trap captures that greasy layer and allows only relatively grease-free water to flow into the soakage pit. This keeps soil pores from clogging, reduces odors, and helps the soakage pit percolate properly. The collected grease is then removed periodically for disposal.

Other options don’t fit because they don’t remove or separate grease from the wastewater. Insecticides target pests, not drainage; chlorine solution disinfects but doesn’t prevent grease buildup or protect soil porosity; heat treatment doesn’t address the drainage issue in a soakage pit.