单项选择题
A.Liquids should never be transferred between tanks without consulting the dock master
B.If sea valves have been disassembled, all bonnets must be checked for leakage when the ship is re-floated
C.Before re-floating, all sea chest strainers should be verified as having been replaced
D.All of the above
单项选择题 Which of the following statements about pump operations is NOT a correct statement?（）
单项选择题 Most pump manufacturers recommend that the suction piping dimension for centrifugal pumps be （）.
单项选择题 In the operation of a flash type evaporator equipped with air ejectors,the air and non- condensable gases are evacuated directly from the （）.