Hotel Service Unit 14 Q1 Quiz

Hotel Service Unit 14 Fresh water Q1

1 / 8

What is one method commonly used on board ships to kill bacteria in potable water?

C) Using deionization

A) Adding sodium chloride

D) Adding carbon dioxide

B) Adding chlorine or chlorine-based compounds

2 / 8

Why is hydrated lime added to fresh water produced on board an ocean-going vessel?

B) To adjust the pH level, making the water slightly alkaline and reducing corrosion

A) To soften the water by removing salts

D) To increase the water temperature

C) To remove organic compounds

3 / 8

What other benefit does adding hydrated lime to water provide?

C) Softens the water by reducing hardness

B) Improves the taste by adding minerals

A) Decreases the taste of salt in water

D) Increases the oxygen content

4 / 8

Which other method is commonly used to produce fresh water on vessels?

D) Ion exchange

C) Solar heating

B) Reverse osmosis filtration

A) Chlorination

5 / 8

What is the first step before bringing a fresh water tank back into service?

C) Fill it with treated water immediately

A) Check for fuel contamination

D) Increase the air pressure in the tank

B) Clean and disinfect the tank

6 / 8

Why is it important to inspect a tank before reintroducing it to service?

D) To confirm it is large enough

C) To check if it is airtight

B) To verify it is structurally sound and free from any signs of corrosion or damage

A) To ensure the tank is well-ventilated

7 / 8

Which alternative method can be used to sterilize water on board without adding chemicals?

C) Boiling the water

D) Adding mineral supplements

A) Adding sand filters

B) Using ultraviolet (UV) light

8 / 8

After cleaning the tank, what should be done next before putting it back into service?

D) Add chlorine directly to the tank

C) Immediately fill it with seawater

B) Leave it open to air for 24 hours

A) Rinse the tank with treated water to remove residual disinfectants

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