Boiler Water/ Feedwater

Question 1

What does the term distillate refer to?

Answer 1

Evaporated water that is discharged from the ships distilling plant

Question 2

Where is distillate stored?

Answer 2

In the reserve feed tanks

Question 3

In ships equipped with demineralizers, the water entering the demineralizer from any tank is called reserve feedwater, while the water flowing out of the demineralizer to the condensate system is called?

Answer 3

Makeup feedwater

Question 4

After steam has done its work, it is returned to the liquid state by cooling in a condenser, what is this liquid termed?

Answer 4

Condensate

Question 5

What are the principle sources of condensate?

Answer 5

Main and auxiliary condensers

Question 6

A properly operating deaerating feed tank (DFT) will maintain the dissolved oxygen content at or below what level?

Answer 6

15 parts per billion (PPB)

Question 7

Boiler water is defined as?

Answer 7

The feedwater as it enters the boiler steam drum

Question 8

If a boiler is producing steam at about 50 percent of its capacity, the dissolved and suspended materials brought into the boiler with the feedwater will concentrate in the boiler at what rate per hour?

Answer 8

10 fold per hour

Question 9

What effect will an excess of hydrogen ions have on boiler water?

Answer 9

Increase in acidity

Question 10

A PH of seven is defined as?

Answer 10

Neutral

Question 11

What effect will an excessive amount of hydroxyl ions have on boiler water?

Answer 11

Alkalinity will increase

Question 12

A hydroxyl ion is represented by what?

Answer 12

OH-