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Safe disposal of waste - class-VIII

Description: safe disposal of waste
Number of Questions: 25
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Tags: soil pollution biology not for breathing not for drinking waste generation and management conservation of environment
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How many methods of collection are there in solid waste management?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Three

  2. Two

  3. Five

  4. Six

Show answer
Correct Option: B

What does soild waste management include?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Dumping process

  2. Disposal process

  3. Throwing process

  4. Removing process

Show answer
Correct Option: B

Which ethod has a relatively high initial cost?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Landfillings

  2. Compositing

  3. Incineration

  4. Pulverization

Show answer
Correct Option: C

Combustable garbage, rubbish and dead animals are:

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Dumped

  2. Burnt

  3. Landfill

  4. All of above

Show answer
Correct Option: B

Which solid waste disposal method is suitable to indian conditions?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Landfillings

  2. Incineration

  3. Pulverization

  4. Composition

Show answer
Correct Option: D

Select the incorrect statement regarding polyblend.

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Recycled and modified form of plastic

  2. Used to lay road when mixed with bitumen

  3. Enhances the water absorbing capacity of bitumen

  4. Both A and B

Show answer
Correct Option: C
Explanation:

Polyblend is a fine powder of recycled modified plastic. The binding property of plastic makes the road last longer besides giving strength to withstand more loads when mixed with bitumen. Polyblend lowers moisture absorption capacity due to the coating of plastics at the surface.

So, the incorrect statement regarding polyblend is 'Enhances the water absorbing capacity of bitumen'.

Which is the best method to dispose off biological wastes from hospitals ?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Incineration

  2. Landfill

  3. Recycling

  4. Composting

Show answer
Correct Option: A
Explanation:

The burning of a substance at high temperature to form ash is called incineration. It is used to destroy biological waste. All the organic matter present in the waste is removed as carbon dioxide and water vapour.

Which method of solid waste disposal is known as hygienic method?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Incineration

  2. Landfilling

  3. Pulverization

  4. Composition

Show answer
Correct Option: D

Biological processes for the treatment of industrial wastes for the safe disposal, can be categorized into aerobic as well anaerobic process.

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. True

  2. False

Show answer
Correct Option: A
Explanation:
Microorganisms already present in wastewater treatment feed on the complex substances in the wastewater, converting them into simpler substances, improving treatment. Biological wastewater treatment is the use of bacteria to degrade and decompose organic materials during treatment. The microbial community is the heart of any wastewater treatment facility. If the treatment system is having a problem, it’s critical to target and fix the root cause: A microbial community that isn’t performing well.
Due to their growth, adaptability, and resilience, wastewater treatment systems rely on microorganisms to degrade organic material and produce clear effluent water. By harnessing the ability of microorganisms to tackle the source of larger issues—degrading odor-causing compounds, for example—biological wastewater treatment offers major advantages over alternative treatment strategies:
Lower operating costs compared to alternatives. Efficient degradation and removal of organic and inorganic compounds. Improved flexibility to handle a wide range of wastewater characteristics and flows.
However, the key to any biological treatment system is ensuring that the existing microbial community has the right conditions to grow.

The total solid matter washed into the sea is approximately

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. 300 million tonnes

  2. 1300 million tonnes

  3. 2300 million tonnes

  4. 3300 million tonnes

Show answer
Correct Option: A

Scrubbers were used 

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. To make air free from microorganisms.

  2. To make air free from dust and gases.

  3. To make air free from solid particles.

  4. None of the above.

Show answer
Correct Option: B

What measures should be taken for waste disposal?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Segregation of biodegradable and non-biodegradable wastes.

  2. Safe disposal of plastic bags.

  3. A compost pit for kitchen wastes.

  4. All of the above.

Show answer
Correct Option: D
Explanation:
Measures for disposal of wastes:
(a) Segregation of biodegradable and non-biodegradable wastes.
(b) Safe disposal of plastic bags.
(c) Vegetable/fruit peels can be placed near trees/plants, which on decomposition will enrich the soil with nutrients.
(d) Give paper wastes for recycling.
(e) Prepare a compost pit for kitchen wastes.

Use of sewage, domestic waste, farm yard manure, etc. will decrease the fertility of the degraded lands.

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. True

  2. False

  3. Nither

  4. Either

Show answer
Correct Option: B

Why is improper disposal of waste a curse to environment?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Wastes pollute our environment

  2. Waste has very harmful effect on the living organisms

  3. Waste decreases the fertility of the soil

  4. All of the above

Show answer
Correct Option: C
Explanation:
Improper disposal of waste pollutes our environment (air, water and soil). Improper waste storage or disposal frequently contaminates surface ground water supplies. The radioactive waste causes harmful effect on the living organism. The non-biodegradable waste decreases the microbial flora of the soil.
So, the correct answer is option D.

Which solid waste disposal mehod is cheaper and simpler?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Pulverization

  2. Compositing

  3. Sanitary Landfilling

  4. Incineration

Show answer
Correct Option: C

Which of the following are environmental friendly practices?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Carrying cloth bags for shopping

  2. Switching off light and fans when not in use

  3. Using public transport

  4. All the above

Show answer
Correct Option: D

Which of the following statements is correct?   

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. There are working 'EcoSan' toilets in many areas of Kerala and Sri-Lanka

  2. Municipal solid wastes are wastes from homes, offices, stores, schools, hospitals, etc. that are collected and disposed by the municipality

  3. In a sanitary landfill, wastes are dumped in a depression or trench after compaction and covered with dirt everyday

  4. All of these

Show answer
Correct Option: D
Explanation:
EcoSan toilet has emerged as a sustainable concept and is prevalent in Delhi, Kerala, and Mumbai for footpath and slum dwellers. These are solid wastes from home, offices, stores, schools, hospitals, hotels etc. These domestic solid wastes one usually, thrown in municipal garbage collecting cans. a depression or trench is made in the ground and wastes are dumped into it after compaction and covered with dirt every day. the above statements are correct.

So, the correct answer is 'All of these'.

Which method is used if suitable dumping areas are not available?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Incineration

  2. Compositing

  3. Pulverization

  4. Disposal into the Sea

Show answer
Correct Option: A

The process of heating the waste at high temperature is called as ________.

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Land-filling

  2. Pyrolysis

  3. Decomposing

  4. Incineration

Show answer
Correct Option: B
Explanation:

The scientific method of solid waste management where the waste is heated to high temperature. This process is beneficial for obtaining gas and electricity. The method is suitable for municipal solid waste management.

Solid matter from land washed annually into oceans is

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. 330 million tonnes

  2. 3300 million tonnes

  3. 3.3 million tonnes

  4. 33 million tones

Show answer
Correct Option: B
Explanation:

Approximately 3300 million tonnes of solid matter from land is washed annually into oceans. Apart from the soil, glasses, metals and plastics are also washed into oceans. This matter spreads over the sea floor.

Thus, the correct answer is '3300 million tonnes.'

Steel, tin and copper are being substituted in many industries by

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Plastics

  2. Ceramics

  3. High strength glass fibres

  4. All the above

Show answer
Correct Option: D

Which method of solid waste disposal is not being successful in India?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Landfillings

  2. Compositing

  3. Sea Disposal

  4. Pulverization

Show answer
Correct Option: A

Which solid waste disposal method is simple and economical?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Landfilling method

  2. Incineration method

  3. Compositing method

  4. Pyrolysis method

Show answer
Correct Option: A

Which solid waste method cannot be used commonly?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Compositing

  2. Landfilling

  3. Pulverization

  4. Sea Disposal

Show answer
Correct Option: C

With passage of time, filled up solid wastes will get stabilized by

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Decomposition

  2. Eutrophication

  3. Hydrolysis

  4. Urbanization

Show answer
Correct Option: A
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