BOOST LEVEL 40 - PART 1 - WATER- LISTENING

Singapore's national water agency aimed to supply over half of the country's water by recycling _________.

• rainwater
• clean water
• wastewater
• black water
• gray water

The program was initiated to ensure Singapore never faced a shortage of _________ water.

• wastewater
• black
• clean
• yellow
• gray

Wastewater is divided into three main types: gray, yellow, and _________ water.

• black
• clean
• rainwater
• potable
• UV-treated

Every day, the amount of wastewater produced globally can fill approximately _________ Olympic-sized swimming pools.

• 40000
• 4000
• 400
• 400000
• 4 million

In an average 4,000 liters of sewage, there is only one liter of _________ fecal material.

• liquid
• solid
• diluted
• concentrated
• treated

Wastewater treatment plants use biological, chemical, and _________ methods to clean the water.

• UV
• physical
• osmotic
• reverse
• microfiltration

For the water to be potable, it undergoes a process called _________, which uses membranes to filter out particles.

• UV disinfection
• chemical disinfection
• microfiltration
• reverse osmosis
• osmosis

UV lamps are used to damage the _________ of any remaining organisms in the water.

• cell walls
• genetic material
• outer layer
• membrane
• nucleus

The direct system of adding treated wastewater to the drinking supply is known as direct _________ reuse.

• UV
• potable
• osmotic
• chemical
• physical

In indirect potable reuse, treated wastewater is first released into an environmental _________ before being used as drinking water.

• filter
• buffer
• reservoir
• tank
• system