Auxiliary Machinery. Test 39

Why is it necessary to have routine testing of the cooling water?

To trace leakage in the cooling water system.
To detect the presence of contaminants in the water that may be injurious to the cooling system.
It is not necessary.
To ensure that the proper residuals of treatment chemicals, as specified, are maintained all time.

Which of the below listed effects can be caused by the presence of Calcium in the boiler water?

No negative effects.
Loss of alkalinity, corrosion of boiler metal surfaces, and loss of phosphate reserve in the boiler.
Pacifying of boiler metal surfaces.
Increase of alkalinity and PH-value.

Is it necessary to cool the water samples from the cooling system, before testing?

What initial simple recommendation can we give to reduce oxygen in the boiler water?

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

It increase the boiler tube metal deposition.
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.
It has no effects.

What will You do if the PH-value in the boiler water is under 7?

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