Practice Exams Grade II Treatment - Division of Water Quality

217. Prior to repairing a pump's electrical circuit, which of the. following actions should you take?A. Disconnect the circuit breaker, place a red tag stating "donot activate," and lock out.B. Notify your supervisor.C.D.Tell all of the operators not to activate the circuit.Turn pump off.218. Pump maintenance includesA.B.Checking operating temperature of bearings.Checking packing gland.C. Operating two or more pumps of the same size alternately toequalize wear.D. All of the above.219. When carrying out a routine inspection on a centrifugal pump, itis noted by the operator that the bearings are excessively hot.This could be caused byA. Over lubrication.B. Speed too slow.C.D.Worn impeller.Worn packing.220. In a centrifugal pump, internal leakage is prevented byA.B.Impellers.Sleeves.C. Volutes.D. Wear rings.221. A valve which allows water to flow in one direction only is avalve.-:---=:---;-­A. Check.B. Gate.C. Globe.D. Petcock.222. Pipe material that is the least susceptible to corrosion byacids formed from hydrogen sulfide gas isA. ACP.B. CIP.C. RCP.D. VCP.223. Centrifugal pump parts includeA. Diaphragm.B.C.Impeller.Piston.D. Rotor.224. Which indicates a good quality domestic activated sludge?A. Black color and septic odor.B. Brown color and musty odor.C.D.Brown color and lots of dark brown foam.Settleability of 900 mls in a 1 liter cylinder over a3D-minute period.