單項選擇題

Which of the following statements is correct with regards to the operation of a centrifugal cargo pump?（）

A.Oil is discharged from the impeller through the outlet
B.Gravity causes the oil to flow toward the discharge
C.The self-priming feature of the centrifugal pump enables it to draw its own suction as it starts
D.The discharge capacity varies directly with the speed of the impeller

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單項選擇題

The static suction head of is the （）

A.distance of the suction liquid level above the line of the pump
B.distance the suction liquid level is below the center line of the pump
C.force necessary to overcome frictional losses in the pump and piping
D.amount in inches of mercury the total suction head is below atmospheric pressure

單項選擇題

A pump is defined as device that（）

A.produces pressure
B.imparts energy to a fluid to move it from level ‘A’ to level ‘B’
C.creates a vacuum to move a liquid in all installation
D.is to develop a pressure differential

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Which of the following statements is correct with regards to the operation of a centrifugal cargo pump?（）

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The static suction head of is the （）

A pump is defined as device that（）

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