IES -Operation difficulties in centrifugal pumps (Common Question )
This is common question asked in UPSC ESE regarding centrifugal pump in Assertion-Reason format. Have a look... a) Pump fails to pump the fluid. Cause & Remedial Measures 1) Improper priming due to leakage of foot valve or incomplete filling. Repair or replace the foot valve, prime completely. 2) Head more than des ign head Reduce the head or change the pump 3) Clogging of impeller, suction pipe or strainer Clean the suspected part 4) Suction lift may be excessive Reduce the height of pump above the sump 5) Speed more than design speed Connect another prime mover of higher speed 6) Direction of rotation of impeller is wrong Change the direction. B) Pump does not give the required capacity a) Leakage of air through the suction pipeor through the gland packing Stop the leakage b) Damage to some parts of the pump bywear & tear Replace the damaged parts c) Clogging of impeller passages Clean the impeller C) Pump has