Power Engineering 3B1 Chapter 11 Exam Questions And Answers 100% Pass

Power Engineering 3B1 Chapter 11 Exam Questions And Answers 100% Pass Subsidence is accomplished by passing water through a basin or tank of such design that the velocity of the water is reduced to a point, to permit ___________. a. subsidence b. coagulation c. flocculation d. filtering - answerb __________ are chemicals, which cause the fine particles to gather together into a larger mass, which will settle out much more readily. a. Caustic b. Coagulants c. Acids d. Zeolite - answerb ___________ is the further increase in size and volume of the precipitating particles and is done by gentle agitation of the water. a. Subsidence b. Coagulation c. Flocculation d. Filtering - answerc The coagulant, when added to the water, will produce a spongy substance known as _____. a. mud ©THEBRIGHT EXAM SOLUTIONS 10/30/2024 11:32 PM b. floc c. sand d. waste - answerb A water _______ allows the coagulation and settling of suspended solids contained in water, to take place. a. softener b. exchanger c. clarifier d. filter - answerc The clarified water is drawn off through a submerged collector pipe at the ______ of the upflow zone. a. bottom b. top c. side d. middle - answerb External water treatment using continuous methods of subsidence allows: 1. Clarified water to be drawn continuously from the tank 2. Continuous removal of solids from the tank 3. Complete removal of turbidity 4. Removal of colloidal particles without coagulation a. 1,2,3 b. 1,3,4 c. 1,2,4 d. 2,3,4 e. 1,2,3,4 - answerc ©THEBRIGHT EXAM SOLUTIONS 10/30/2024 11:32 PM A ______ consists of a bed of porous material through which the water is passed, either by gravity or under pressure. a. softener b. exchanger c. clarifier d. filter - answerd When filtering water, which will be used for boiler feedwater, __________ is preferred as the use of sand may result in the water picking up silica, which could deposit as scale, in the boiler. a. resin b. gravel c. anthracite d. Zeolite - answerc Pressure gauges, are installed on the inlet and outlet lines and when the pressure difference between them reaches a certain value, usually from ___ to ___ kPa, it means that backwashing is required. a. 5,10 b. 35,55 c. 100 , 200 d. 1,10000 - answerb If filters are used alone, the