Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

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

Combustable garbage, rubbish and dead animals are:

  1. Dumped

  2. Burnt

  3. Landfill

  4. All of above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Combustible materials, including rubbish and animal remains, are typically incinerated (burnt) to reduce volume and eliminate pathogens. While they can be landfilled, burning is the standard management practice for combustible waste.

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

Which solid waste disposal method is suitable to indian conditions?

  1. Landfillings

  2. Incineration

  3. Pulverization

  4. Composition
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Composting is most suitable for Indian conditions because it's low-cost, environmentally friendly, and produces useful fertilizer. India's climate supports rapid aerobic composting, and it handles the high organic content in Indian waste.

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

Select the incorrect statement regarding polyblend.

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

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

  1. Incineration

  2. Landfill

  3. Recycling

  4. Composting
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  1. Incineration

  2. Landfilling

  3. Pulverization

  4. Composition
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Composting is considered the most hygienic solid waste disposal method because it converts organic waste into stable, pathogen-free compost through controlled microbial decomposition. It's environmentally friendly and produces useful fertilizer.

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

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

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

The total solid matter washed into the sea is approximately

  1. 300 million tonnes

  2. 1300 million tonnes

  3. 2300 million tonnes

  4. 3300 million tonnes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Scientific estimates of the total solid matter transported by rivers into the oceans are generally cited around 300 million tonnes annually. This is a specific factual figure often found in environmental science textbooks.

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

Scrubbers were used 

  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.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Scrubbers are air pollution control devices used to remove harmful gases and particulate matter (dust) from industrial exhaust streams. They work by spraying a liquid to capture the pollutants.

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

What measures should be taken for waste disposal?

  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.
Reveal answer Fill a bubble to check yourself
D Correct answer
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.
Multiple choice biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

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

  1. True

  2. False

  3. Nither

  4. Either
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Organic waste, sewage, and manure are rich in nutrients and organic matter, which improve soil structure and fertility. Therefore, their application increases, rather than decreases, the fertility of degraded lands.