POWER ENGINEERING 4B BOOK 2 PUMPS AND COMPRESSORS

c - Answer-centrifugal pumps convert rotating mechanical energy into kinetic energy then a) discharge the kinetic energy b) back to mechanical energy c) into potential energy in the form of pressure d) into centrifugal force b - Answer-a volute type pump a) is a positive displacement pump b) has spiral casing with an increasing cross sectional area c) reduces velocity in the discharge nozzle d) is a regenerative type pump a - Answer-pump wear rings are installed on an impeller by threading, or a) shrinking b) welding c) brazing d) forging b - Answer-A speed-increasing gear is commonly used on a) rotary lobe compressors b) screw compressors c) sliding vane compressors d) lobe compressors c - Answer-Rotary pumps should be started with the discharge valve open because they are _________________ pumps a) reciprocating b) double-acting c) Positive displacement d) regenerative a - Answer-The capacity of a centrifugal pump a) varies with discharge pressure b) is fixed and can only be altered by changing the impeller c)