TERMINAL OBJECTIVE - h1018v1

Mechanical Science Volume 1 of 2
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Pumps DOE-HDBK-1018/1-93 OBJECTIVES TERMINAL OBJECTIVE 1.0 Without references, DESCRIBE the purpose, construction, and principles of operation for centrifugal pumps. ENABLING OBJECTIVES 1.1 STATE the purposes of the following centrifugal pump components: a. Impeller b. Volute c. Diffuser d. Packing e. Lantern Ring f. Wearing ring 1.2 Given a drawing of a centrifugal pump, IDENTIFY the following major components: a. Pump casing b. Pump shaft c. Impeller d. Volute e. Stuffing box f. Stuffing box gland g. Packing h. Lantern Ring i. Impeller wearing ring j. Pump casing wearing ring 1.3 DEFINE the following terms: a. Net Positive Suction Head Available b. Cavitation c. Gas binding d. Shutoff head e. Pump runout 1.4 STATE the relationship between net positive suction head available and net positive suction head required that is necessary to avoid cavitation. 1.5 LIST three indications that a centrifugal pump may be cavitating. 1.6 LIST five changes that can be made in a pump or its surrounding system that can reduce cavitation. 1.7 LIST three effects of cavitation. 1.8 DESCRIBE the shape of the characteristic curve for a centrifugal pump. 1.9 DESCRIBE how centrifugal pumps are protected from the conditions of dead heading and pump runout. Rev. 0 ME-03 Page v

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