CentrifugalPumps..docVIP

Centrifugal Pumps Name: Date: Score(%): Circle the letter corresponding to the most correct answer for each question. Four points each. INSERT PICTURE HERE. (1) What number indicates the discharge line on this pump? 1 4 6 7 (2) The suction eye is located at number: 1 3 4 6 (3) What kind of impeller does this pump have? open closed partially open none of the above (4) Where is the mechanical seal located on this pump? 3 5 6 7 (5) The impeller in a centrifugal pump is the device that adds: pressure energy to the liquid velocity energy to the liquid velocity and pressure at the same time NPSH required (6) The device which prevents flow from the impeller back into the suction is the: mechanical seal. wear ring. lantern ring. collar. (7) Which of the following is the most effective for controlling leakage? a pump with a packing box a pump that uses mechanical seals seal-less pump compression ring pump (8) The function of the pump bearings is to: allow the shaft to rotate freely control the radial movement control axial movement all of the above (9) What is the total head produced by this pump? INSERT PICTURE HERE 10 feet 20 feet 30 feet 40 feet (10) Which of the following does not affect the pressure that a liquid exerts at the bottom of the tank? specific gravity tank diameter the height of the liquid atmospheric pressure (11) What is the total head produced by the pump? INSERT PICTURE HERE 10 feet 20 feet 30 feet 40 feet (12) The liquid being pumped will vaporize if the absolute suction pressure is: lower than the vapor pressure of the liquid being pumped higher than the vapor pressure of the liquid being pumped above 14.7 psi equal to the absolute discharge pressure (13) The net positive suction head (NPSH) is the absolute suction head: minus the vapor pressure head plus the vapor pressure head divided by the friction loss times the absolute discharge head (14) Which of the following will resu