RO Quiz

Reverse osmosis helps in mineralizing water

• True

• False

Answer explanation

Reverse Osmosis is commonly called RO and it is a process used to remove minerals and ions from water by pushing it under pressure through a semi-permeable RO membrane

______ is used for the RO process.

• Highly permeable membrane

• Permeable membrane

• Semi-permeable membrane

• Non-permeable membrane

Answer explanation

Reverse Osmosis is commonly called RO and it is a process used to remove minerals and ions from water by pushing it under pressure through a semi-permeable RO membrane.

In RO, pressure that is greater than the naturally occurring osmotic pressure is applied in order to ______

• Mineralize water

• Desalinate water or filtration of water

• Decompose organics

• Push bacteria across membrane

Answer explanation

In RO, the pressure that is greater than the naturally occurring osmotic pressure is applied in order to remove salts and ions from the water, allowing pure water through while holding back a majority of contaminants.

A reverse osmosis membrane is a semi-permeable membrane that allows the passage of _________

• Water

• Dissolved salts

• Organics

• Bacteria

Answer explanation

Reverse Osmosis is commonly called RO and the process uses a semi-permeable membrane that allows the passage of water alone and holds back the contaminants.

Osmosis is a process where a stronger saline solution will tend to migrate to a weaker saline solution.

• True

• False

Answer explanation

Osmosis is a naturally occurring phenomenon and one of the most important processes in nature. It is a process where a weaker saline solution will tend to migrate to a strong saline solution.

What is the average pressure at which the reverse osmosis operates for hard water purification

• 100-800 psi

• 50-100 psi

• 1000-2000 psi

• 30-50 psi

Answer explanation

The reverse osmosis is operated usually in the range 100-800 psi for hard water. This however depends on the TDS present in the raw water. This also depends on the surface area of the membrane used.

What is the other name for reject stream?

• Permeate

• Non-concentrated stream

• Brine stream

• Polluted water stream

Answer explanation

The other name for the reject stream is the brine stream where the concentration of the pollutants is more.

Should RO water used to water plants???

• Yes!! Definitely

• May be not!!

• No!!!!

Answer explanation

Reverse osmosis water may not be the best choice for watering some houseplants. Plants are used to absorb minerals and other nutrients in them. On the other hand, certain acid-loving plants can work well with RO water thanks to its low pH level

RO along with UV radiation combination will be a good for treating water.

• True

• False

Answer explanation

RO along with UV radiation combination will be a good for treating water.

Yes because RO filters most of the bacteria and impurities while UV treatment would ensure that most of the bacteria and viruses are taken care of.

Select the incorrect statement from the following option.

• Osmosis is the phenomenon by virtue of which flow of solvent takes place from low concentration to high concentration through a semi-permeable membrane

• The flow continues till the concentration is equal on both the sides

• The driving force of osmosis is osmotic pressure

• Osmosis is used for the treatment of waste water

Answer explanation

Reverse osmosis is used for the treatment of waste water. All the other options are correct. Osmosis is the phenomenon by virtue of which flow of solvent takes place from low concentration to high concentration through a semi-permeable membrane.