单项选择题
A gear pump belongs to （） according to its working principle.
A.reciprocating pumps
B.positive displacement pumps
C.centrifugal pumps
D.centripetal pumps
点击查看答案&解析
相关考题
-
单项选择题
Gear pumps are of positive displacement type pumps because they discharge a near constant amount of liquid （） pressure.
A.depending on
B.in relative to
C.regardless of
D.because of -
单项选择题
The gear and screw pumps are classified as （）.
A.variable stroke pumps
B.multistage pumps
C.positive displacement pumps
D.triple-ported pumps -
单项选择题
Through a （） pump, the liquid is transferred from the suction to the discharge by the mechanical variation of the volume of a chamber or chambers.
A.positive displacement
B.ejector
C.centrifugal
D.air compressor
