Screening

Q. What are the steps involved in getting clarified water from wastewater? [2 MARKS]

Q.

Explain sewage treatment plan with the help of a flow chart ?

Q.

Describe the steps involved in getting clarified water from wastewater?

Q.

The process of removing large objects such as plastic bags, clothes, diapers etc using grills and nets in a wastewater treatment plant is called________.

1. Preening

2. Screening

3. Griming

4. Washing

Q.

Sewage wastes should be treated well to remove ______ substances, before being released into water. (green/toxic)

Q.

Question 8
Explain the function of bar screens in a wastewater treatment plant.

Q. The process of removing large objects such as plastic bags, paper, metals using grills and nets is called .

1. screening
2. sedimentation
3. purification
4. filtration

Q. Water pollution can be decreased by proper collection and disposal of domestic sewage.

1. True
2. False

Q. Complete the following conceptual picture.

Q. Which amongst the following will not be removed after screening of wastewater?

1. Grit
2. Plastic bottles
3. Oil and grease
4. Cotton buds

Q. Describe various steps of cleaning wastewater in a wastewater treatment plant.

Q.

what does pragmatic mean ?

Q. The process of removing large objects such as plastic bags, paper, metals using grills and nets is called .

1. screening
2. sedimentation
3. purification
4. filtration

Q. Three statements are provided here which define the terms - Sludge

1. The settled solids that are removed in wastewater treatment with a scraper.
2. Water from kitchen used for washing dishes.
3. Wastewater released from homes, industries, hospitals and other public buildings.
4. None of these

Q.

List the precautions you should take while disposing off waste in the sewage system.

Q. Given below is a jumbled sequence of the processes involved in a wastewater treatment plant. Arrange them in their correct sequence.
(a) Sludge is scraped out and skimmer removes the floating grease.
(b) Water is made to settle in a large tank with a slope in the middle.
(c) Large objects like plastic bags are removed by passing wastewater through bar screens.
(d) Sand, grit and pebbles are made to settle by decreasing the speed of incoming wastewater.
(e) Wastewater enters a grit and sand removal tank.

Q. In the waste water treatment plant (WWTP), air is pumped into water to

1. Support the growth of anaerobic bacteria
2. Throw human waste
3. Support the growth of aerobic bacteria
4. Disinfect water

Q.

The process of removing large objects such as plastic bags, clothes, diapers etc using grills and nets in a wastewater treatment plant is called________.

1. Washing

2. Griming

3. Screening

4. Preening