单项选择题
The （）pump is usually used as the lubricating oil pump.
A.turbine
B.screw
C.vaneejector
D.centrifugal
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相关考题
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单项选择题
The reciprocating pump can’t draw water from a tank may be caused by （）.
A.leaky pipe
B.opened inlet valve
C.too much water in tank
D.None of the above -
单项选择题
（）sometimes called filter, is a device designed to prevent the passage of unwanted solids into the system.
A.Steam trap
B.Check valve
C.Separator
D.Strainer -
单项选择题
Hydraulic pumps most commonly used in steering systems are of the （）.
A.lobe type
B.screw type
C.axial piston type
D.volute type
