单项选择题
Under centrifugal pumps are the volute, diffuser, mixed-flow, axial flow and （） or regenerative types.
A.reciprocating
B.hydraulic
C.turbine
D.vane
点击查看答案&解析
相关考题
-
单项选择题
Domestic water pump is started automatically by （） which operates as the water level falls to a predetermined level.
A.a level controller
B.a temperature switch
C.a pressure switch
D.a floating ball -
单项选择题
In cargo crane, （） for lifting the load.
A.a hoisting motor
B.a luffing motor
C.a mooring motor
D.a slewing motor -
单项选择题
Manually operated band brakes may be fitted and （） will have a brake arranged to fail-safe.
A.the drive pump
B.the drive motor
C.the warp end
D.the purchase
