Maintenance Procedures. Test 6

Why must we never use grinding paste on the seating or on the gliding surface of a needle?

The grinding paste is too expencive
The grinding paste is too rough
The grinding paste will cause a too smooth movement the needle and then damage the seating
Any remaining grinding paste will corrode on the metal surface and after some time the needle will be damaged

What do you consider as the most important task after a piston job ?

Starting the auxiliary blower to ventilate the scavenging belt, and the cylinder liners, to ensure that the engine has sufficient fresh air for starting.
Starting the engine to see that it rotates.
A search inside the crankcase for tools and rags.
Patch up destroyed paint work on the crankcase doors.

Is it recommended to adjust the spring tension on the fuel valves during operation to achieve:

When testing a overhauled fuel valve, the test pump is to be operated as follows:

Pushed gradually so the opening point can easily be detected
Of no importance.
Pushed by sufficient force to accurately check the correct opening pressure
Pushed slowly and use the finger tip to detect the accurately correct opening pressure

When fitting a mechanical seal consisting of carbon/porcelain rings care should be taken that:

What will You do if the plate exchanger leaks after cleaning and is back in service. (The measurement A is tightened to minimum measurement.)

The plate heat exchanger is separated for cleaning. What will You do if the plates is thick with scale or other organic material?

Use high-pressure cleaner with abrasives.
Put the plates in water with qualified cleaning chemicals, and use soft brush, or high pressure cleaner with care.
Change the plates.
Use wire- brush, metal scrapers etc. for cleaning of plates.

Why do we have to make sure that the plate pack is compressed to the right measurement A, after insertion of plates?

Why do we have to make sure that the plate pack is compressed to the right measurement A, after insertion of plates?

After cleaning and back in service, You observe that the heat transfer is bad. What is the first thing to do?

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