Hotel Service Unit 14 Q3 Quiz

Hotel Service Unit 14 Fresh water Q3

1 / 8

What causes copper staining in a fresh water system?

B) Low pH or acidic water causing copper to dissolve from pipes

A) High iron content in water

C) High levels of chlorine

D) Presence of organic matter

2 / 8

How long should the water system be left with superchlorination levels to ensure disinfection?

B) 2–4 hours

D) 48 hours

C) 12–24 hours

A) 30 minutes

3 / 8

What should be done after completing the superchlorination process?

D) Boil the water

C) Reduce the water pressure

A) Flush the system with fresh water until chlorine levels are below 0.5 mg/L

B) Add more chlorine to maintain high levels

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What additional method can help reduce copper staining if adjusting pH is insufficient

D) Increasing the salinity of the water

C) Lowering water pressure

B) Reducing water temperature

A) Using water filters with copper-absorbing materials

5 / 8

Which pH range helps prevent copper staining in fresh water systems?

A) 2–4

B) 5–6

D) 9–10

C) 7–8

6 / 8

What is the primary purpose of superchlorinating a fresh water system?

B) To eliminate bacteria, pathogens, and biofilm buildup

C) To improve the taste of water

D) To increase water acidity

A) To reduce the hardness of water

7 / 8

During the superchlorination process, what is the typical chlorine concentration required?

C) 100 mg/L

D) 500 mg/L

B) 20–50 mg/L

A) 1 mg/L

8 / 8

What is a common method to prevent copper staining in a water system?

B) Using alkaline additives to raise pH and reduce water acidity

C) Boiling the water

D) Increasing water pressure

A) Adding salt to the water

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