Question  

With reference to Boiler water tests carried out onboard:

Discuss the possible reasons for the following changes in boiler water test results, and state what actions should be taken in each case;

Reduction in total dissolved solids and chemical reserves.

Reduction in phosphate reserve, with increase in chlorides and total dissolved solids;

Reduction in alkalinity reserve only.

Increase in oxygen levels only.

State why the complete results of boiler water tests are logged or entered into a data retrieval system rather than a note being made of any particular result which may be outside set limits

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