forty-foot wooden hull fishing vessel sprang an unexpected leak a few days after leaving port. As more water entered the vessel, the engine was flooded, and the vessel eventually sank. Inspection of the vessel during the leak showed that the water was coming from underneath a refrigerated space in the front part of the vessel. In view of its construction style, the bilge underneath the vessel was inaccessible. The underwriter refused to indemnify the insured for the loss of the vessel by claiming that the latter had not exercised diligence to make the vessel seaworthy prior to the developing of the leak. The owner/master of the ship had no knowledge of the leak before the ship started its voyage. Do you think the loss is covered under the policy?

A CMAS treatment system must be designed for a municipal wastewater and the following operating conditions: • Effluent flow of 0.39 m³/s leaving the primary clarifier Effluent soluble BOD; of 310 mg/L leaving the primary clarifier 20 mg/L of soluble BOD5 allowed in the effluent from the secondary clarifier Negligible suspended solids in the effluent from the secondary clarifier • Volatile suspended solids concentration of 4300 mg/L in the aeration tank • In the laboratory under log-growth conditions, the microorganisms used in the aeration tank can convert 100 g soluble BODS into 55 g VSS • Microorganisms in the CMAS system have a death rate constant of 0.05 d'. Sludge age in the CMAS treatment system will be 4 days (a) Determine the % treatment efficiency for soluble BOD; required in the CMAS system. (b) Determine the required volume of the aeration tank (in m²) and HRT (in h). (c) Determine the food-to-microorganism ratio (in d') and the specific substrate utilization ratio (in d').…

The three statements below all refer to standard single-barrel reverse flow cyclones used to remove particulate matter from air. For each statement, indicate whether it is True or False and explain your reasoning. a) If a cyclone has a collection efficiency of 25% for a specific-sized particle, then it can be expected always to have a collection efficiency of 50% if the particle size doubles, assuming all else remains constant. b) If a cyclone has a collection efficiency of 25% for a particle having a specified density, then it can be expected always to have a collection efficiency of 50% if the particle density doubles, assuming all else remains constant. c) To a single decimal place, the effective number of turns made in traversing a standard cyclone is always 37.7, independent of the cyclone size and air flow rate into the cyclone.

Propose a commercially available pump which may be used in the case of extremely abrasive and corrosive slurries. Its performance curve must be shown.