A、backwards
B、forwards
C、upward
D、downwards
更多“A centrifugal impeller consists of a number of vanes curving （） from the direction of rotation.”相关的问题
A、A.change in impeller diameter B、B.square of the impeller diameter C、C.cube of the impeller diameter D、D.impeller efficiency for large changes in the size of the impeller
A、change in the impeller diameter B、square of the impeller radius C、cube of the impeller diameter D、impeller efficiency for large changes in its size
A、Close radial clearance between impeller hub and casing B、Low rotational speed of impeller C、Removable end plate D、Replaceable impeller and casing wearing rings
A、shaft and impeller B、motor and pump shaft C、casing and impeller wearing rings D、lantern ring and impeller
A、providing the impeller with balancing holes B、the use of symmetrical impeller C、neither A nor B D、either A or B
A、maintain radial alignment between the pump impeller and casing B、absorb all impeller shaft end thrust C、prevent water leakage to the atmosphere D、prevent wear of the pump casing and/or impeller
A、diameter of the discharge piping, with all other factors remaining the same B、diameter of the suction piping, with all other factors remaining the same C、width of the impeller only D、diameter of the impeller
A、Single stage or multistage B、High pressure or low pressure C、Open or close coupled D、Horizontal or vertical
A、Oil is discharged from the impeller through the outlet B、Gravity causes the oil to flow toward the discharge C、The self-priming feature of the centrifugal pump enables it to draw its own suction as it starts D、The discharge capacity varies directly with the speed of the impeller
客服
TOP
查看正确答案
