turbine
centrifugal
ejector
mixed flow
第1题：
Which statement is NOT true?
A.While displacement pump works, volume of the working chamber will increase and decrease alternately
B.A gear pump always has two gears
C.Any vane pump will have a rotor within a ring
D.A balanced vane pump has two outlet ports and they are positioned symmetrically
第2题：
If it becomes necessary to pump bilges while a vessel is in port, which of the following procedures should be followed?
A.Pump only if the discharge is led to a shore tank or barge
B.Pump only during the hours of darkness
C.Pump only on the outgoing tide
D.Pump only as much as is necessary
第3题：
Which of the following terms is used to identify the pressure of the liquid entering a pump?
A.Suction head
B.Pump head
C.Discharge head
D.Total head
第4题：
Single stage or multistage
High pressure or low pressure
Open or close coupled
Horizontal or vertical
第5题：
Which method should be used to warm up the pump turbines prior to discharge ________．
A.Lock the turbine rotor and slowly bleed in steam until operating temperature is reached
B.Run the pump at high speed with the discharge valves closed
C.Run the turbine at slow speed with the pump disconnected
D.Shut the discharge valve and run the pump at slow speed
第6题：
Which statement is NOT true?
A.In a simple vane pump, the rotor and cam ring are exactly concentric
B.Balanced vane pump has an elliptical cam ring
C.Liquid in both gear pump and vane pump are forced out to the outlet.
D.Balanced vane pumps can work at a higher pressure than the simple vane pump
第7题：
The amount of fuel delivered by a helical plunger fuel injection pump is controlled by ______.
A.varying the pump discharge pressure
B.varying the pump return pressure
C.rotation of the pump plunger
D.rotation of the pump barrel
第8题：
A. You can detach from a data pump export job and reattach later.
B. Data pump uses parallel execution server processes to implement parallel import.
C. Data pump import requires the import file to be in a directory owned by the oracle owner.
D. The master table is the last object to be exported by the data pump.
E. You can detach from a data pump import job and reattach later.
第9题：
Which statement is TRUE concerning deep well self-priming pumps ________．
A.When loading oil cargo，it is always loaded via the discharge line through to the pump until the tank is topped off
B.Stripping systems are generally eliminated for the purposes of cargo handling
C.In recent years deep well pumps have become increasingly unpopular in product tankers and medium size crude ships
D.There is no danger of damaging the pump from overheating
第10题：
Oil is discharged from the impeller through the outlet
Gravity causes the oil to flow toward the discharge
The self-priming feature of the centrifugal pump enables it to draw its own suction as it starts
The discharge capacity varies directly with the speed of the impeller