A series of tests was conducted on a centrifugal pump to verify some iso-efficiency test results. The pump itself has a 12-nominal schedule 40 inlet line and a 10-nominal schedule 40 outlet line. What was the purpose of conducting these tests?
1) To determine the efficiency of the pump
2) To measure the flow rate of the pump
3) To test the durability of the pump
4) To compare the pump with other models