【单选题】
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
查看正确答案
A、The high discharge pressure of the rotary pumps permits a larger volume of fluid per unit time than the reciprocating pump B、Rotary pumps are capable of pumping more fluid than reciprocating pumps of the same weight C、Rotary pumps occupy only one-half the space of reciprocating pumps D、Rotary pumps eliminate discharge slippage of the pumped liquid, while this does not hold true for a reciprocating pump
