Auxiliary Machinery. Test 39 – Online Maritime Tests

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

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

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

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

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

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

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

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.
To ensure that the proper residuals of treatment chemicals, as specified, are maintained all time.
It is not necessary.

Review Answers