A、moisture emulsification of the bearing grease
B、insufficient circulation and overheating of the bearing
C、proper grease circulation to cool the bearing
D、sliding friction between balls and races
更多“In most pumps and pump motors overpacking the ball bearings full of grease will result in （）”相关的问题
A、centerline of the pump and the level of the liquid in the suction well when the source of liquid is below the pump B、centerline of the pump and the suction liquid level when the source of liquid is above the pump C、centerline of the pump and the level of the discharge liquid D、liquid levels of the suction and discharge
A、booster pump coming on the line and discharging properly B、booster pump failing to start C、booster pump being lined up in the wrong direction D、ship's pump speeding up
A、A.excessive internal leakage in the pump B、B.low discharge pressure and fluid flow C、C.excessive fluid level in the hydraulic reservoir D、D.operation of the pump at 100% efficiency
A、You can detach from a data pump export job and reattach later. B、Data pump uses parallel execution server processes to implement parallel import. C、Data pump import requires the import file to be in a directory owned by the oracle owner. D、The master table is the last object to be exported by the data pump. E、You can detach from a data pump import job and reattach later.
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