Auxiliary Machinery. Test 33

Which of the following effects is likely caused by oil contamination in the boiler water?

It increase the boiler tube metal deposition.
It has no effect.
It cause pittings on the boiler metal surfaces.
It adheres to the boiler tubes and reduce the heat transfer. It combines with solids to produce sticky deposits.

Why is temperature control accuracy so important when cleaning lub oil in a conventional separator

To prevent to many temperature alarms
Temperature fluctuations can affect the back pressure
Small changes in temperature can cause large movement of the interface
Continuous high temperature gives the best separation

If a shaft of a centrifugal pump shows excessive wear by way of the stuffing box, is this caused by :

Wrong direction of rotation.
Discharge pressure of the pump too high.
Incorrect material used in construction of the shaft.
Excessive heating caused by over tightening of the gland packing.

If a trunk type engine has been running for 24 hour without lub oil separator in operation; when restarting the separator what must be the time between discharges to be set

15 minutes
5 minutes
Depends on the type of oil
Automatically adjusted

What would you do if you after starting the separator discovered that the settling tank was full of water

Use full separation capacity
It depends on the installation
Stop the separator and drain the water from the tank
Increase the flow through the separator

What will happen in a purifier bowl if either; oil density, viscosity or flow increase

The interface moves outwards
It depends on the change in temperature
The interface moves inwards
Loss of water seal

Review Answers

Auxiliary Machinery. Test 33

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