Cavitation erosion in the cooling water system of a diesel engine usually occurs at the pump impeller, and on the waterside of the （）
Most pump manufacturers recommended that the discharge piping for centrifugal pumps be （）.
A common rail engine has only one or two high pressure pumps in operation at the same（）time, and the injection into each cylinder.
Exhaust temperature increases in all cylinders, the possible cause may be（） (1) increased scavenging air temperature (2) air in fuel pumps and fuel valves (3) fouling of air and gas passages
In the variable delivery pump, moving the spindle more from the central point will cause （） fluid to be pumped and consequently （）pressure is generated to drive the rams.
A double suction centrifugal pump impeller has been installed in the reverse direction, and will （）.
What is a function of the wearing rings used in most centrifugal pumps?（）
Maintaining the close tolerances in diesel fuel pumps and injectors requires the use of（）.
To absorb the wear resulting from impeller rotation and abrasives in the liquid, a centrifugal pump is usually fitted with （）.
Prior to running the hydraulic pump, examine the system carefully and ensure that the lever of control valves is in （） position.
In a radial piston pump, reversal and control of fluid flow are accomplished by moving the （）.
When in operation, it is unavoidable that a small amount of oil （） through leakage, and in order to compensate for these leaks the system is connected to a feed pump.
Which of the following pumps will most affect oily water separator performance and give the worst result?（）
Hydraulic pumps most commonly used in steering systems are of the （）.
Two main lubricating oil pumps are usual and are obligatory in （）.
Most pump manufacturers recommend that the suction piping dimension for centrifugal pumps be （）.
If you heard a ‘crackling’ noise in centrifugal pump, the most probable cause of the problem would be（）
The SOLAS convention prescribes that in the fire fighting drill the duty engineer should start the pump and supply deck water in（） minute(s).
The plunger in the fuel injector pump, usually operated by a （）, is driven up and down when working.
In which situations does the Oracle Data Pump use external tables and not the direct path load whileexporting a table（）
Your vessel is taking on fuel oil when a small leak develops in the hose and you have ordered the pumping stoppedBefore resuming pumping，you should（）.
In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.
What’s the most obvious difference among animal-driven chain pump, water-driven chain pump and wind-driven chain pump?
Biology teachers often__ the heart and a pump in order to help students understand how the heart works（）
