Hotel Service Unit 14 Q3 Quiz

Hotel Service Unit 14 Fresh water Q3

1 / 8

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

C) 12–24 hours

D) 48 hours

A) 30 minutes

B) 2–4 hours

2 / 8

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

B) Reducing water temperature

C) Lowering water pressure

D) Increasing the salinity of the water

A) Using water filters with copper-absorbing materials

3 / 8

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

B) 5–6

C) 7–8

A) 2–4

D) 9–10

4 / 8

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

C) 100 mg/L

D) 500 mg/L

A) 1 mg/L

B) 20–50 mg/L

5 / 8

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

D) Increasing water pressure

C) Boiling the water

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

A) Adding salt to the water

6 / 8

What should be done after completing the superchlorination process?

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

D) Boil the water

7 / 8

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

A) To reduce the hardness of water

C) To improve the taste of water

D) To increase water acidity

B) To eliminate bacteria, pathogens, and biofilm buildup

8 / 8

What causes copper staining in a fresh water system?

D) Presence of organic matter

C) High levels of chlorine

A) High iron content in water

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

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