Онлайн-тестирование: Test about Separators, ALCAP Fuel Oil System
A screw pump is a good solution to the feed pump required for the separator, because:
It costs less than a reciprocating pump.
It is more energy efficient.
It does not separate the particles in the oil before reaching the separator.
Loss of Water Pressure to the Valve block will:
Make system malfunction.
Will not affect the system.
Water pressure loss can be accommodated for some time.
One of the main functions of the three-way recirculation valve is:
To provide different paths for the oil to travel.
To increase the complexity of the system.
To recirculate oil away from the separator in the event of an abnormal situation.
The back pressure setting is:
Midway between delivery height pressure and pressure required to overflow bowl.
Midway between feed pressure and pressure required to overflow bowl.
Not governed by delivery pressure or by overflow pressure.
The oil entering the separator should be preheated and of lower viscosity, because:
It ensures better separation.
It reduces the speed of separation.
It is necessary to run the preheater.
The oil paring discs for conventional and ALCAP separators are different in the following ways:
ALCAP paring discs are larger to cope with more viscous oils.
ALCAP oil paring discs have regulating holes.
The edge of the ALCAP oil paring disc has 2 lips to make a seal and prevent air getting drawn in.
There is no difference, they are inter-changeable.
What is the purpose of these holes?
To prevent build-up of pressure when the drain valve is closed.
To allow movement to minimise over-heating.
So there is always a flow through the small hole in the flow control disc to stop it getting blocked.
To allow air to be vented from the oil paring chamber.
When might you adjust parameter 20?
Parameter 20 relates to a separator type and should not be changed.
When commissioning a new installation or fitting a new EPC card.
When using a fuel oil separator to clean lube oil.
Which group of parameters may have to be adjusted for a different oil type?
All of them.
Which of the following is most accurate?
The ALCAP Separator has to have a back-pressure of 1,5-2,0 bar to run on auto.
The back pressure regulating valve is automatic and part of the ALCAP principle.
The transducer monitors changes in the condition of the oil leaving the bowl.
The recirculation valve always changes position for an abnormal situation.
Which of the following statements best describe the purpose of parameters?
To adjust the EPC 400 to the correct variables for each installation to ensure optimal performance.
To adjust the EPC 400 for different separator types and installations, to ensure optimum performance.
It makes adjustments very easy.
Part of the fashion in moving to more sophisticated electronics.
Which statement best describes why a flow control disc can replace a set of gravity discs?
Normally the ALCAP separator runs as a clarifier, and when draining water, it is a purifier with a restricted broken water seal.
By keeping interface outside the disc stack, the water seal is less important, only one flow control disc required.
With the ALCAP the chance of having the interface into the disc stack is reduced, because of the small hole in the flow control disc.
With the ALCAP we are not so concerned with the position of the interface, it can be outside the edge of the top disc. It is not necessary to change gravity discs to ensure correct interface position.
Why is water added to the ALCAP fuel separator bowl after each discharge?
By keeping the sludge moist hard sludge is prevented, and a good discharge results.
To displace the oil and minimise on oil losses.
To check that the transducer is still working the reference has to change.
This puts a precise quantity of water into the oil, which can be measured by the transducer.
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