Hotel Service Unit 14 Q3 Quiz

Hotel Service Unit 14 Fresh water Q3

1 / 8

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

C) 100 mg/L

B) 20–50 mg/L

D) 500 mg/L

A) 1 mg/L

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

D) Increasing the salinity of the water

A) Using water filters with copper-absorbing materials

C) Lowering water pressure

B) Reducing water temperature

3 / 8

What causes copper staining in a fresh water system?

A) High iron content in water

D) Presence of organic matter

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

C) High levels of chlorine

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

D) Increasing water pressure

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

C) Boiling the water

A) Adding salt to the water

5 / 8

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

B) 5–6

A) 2–4

C) 7–8

D) 9–10

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What should be done after completing the superchlorination process?

B) Add more chlorine to maintain high levels

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

D) Boil the water

C) Reduce the water pressure

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

C) 12–24 hours

B) 2–4 hours

A) 30 minutes

D) 48 hours

8 / 8

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

A) To reduce the hardness of water

B) To eliminate bacteria, pathogens, and biofilm buildup

D) To increase water acidity

C) To improve the taste of water

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