Waste MCQ Quiz in मल्याळम - Objective Question with Answer for Waste - സൗജന്യ PDF ഡൗൺലോഡ് ചെയ്യുക

Last updated on Mar 11, 2025

നേടുക Waste ഉത്തരങ്ങളും വിശദമായ പരിഹാരങ്ങളുമുള്ള മൾട്ടിപ്പിൾ ചോയ്സ് ചോദ്യങ്ങൾ (MCQ ക്വിസ്). ഇവ സൗജന്യമായി ഡൗൺലോഡ് ചെയ്യുക Waste MCQ ക്വിസ് പിഡിഎഫ്, ബാങ്കിംഗ്, എസ്എസ്‌സി, റെയിൽവേ, യുപിഎസ്‌സി, സ്റ്റേറ്റ് പിഎസ്‌സി തുടങ്ങിയ നിങ്ങളുടെ വരാനിരിക്കുന്ന പരീക്ഷകൾക്കായി തയ്യാറെടുക്കുക

Latest Waste MCQ Objective Questions

Top Waste MCQ Objective Questions

Waste Question 1:

Match the following.

List– I

(Colour codes)

List – II

(Methods for Disposals)

1) Yellow plastic bags i) Disposal in secured landfills
2) Black plastic bags ii) Incineration and deep burials
3) Blue/white plastic bags iii) Autoclaving and chemical treatment
4) Red plastic bags iv) Microwave treatments and destruction

Choose the correct code from the option below:

  1. 4 - i, 3 - ii,  2 - iii, 1 - iv
  2. 1 - i, 4 - ii, 3 - iii,  2 - iv
  3. 2 - i, 1 - ii, 4 - iii, 3 - iv
  4. 3 - i, 2 - ii, 1 - iii, 4 - iv

Answer (Detailed Solution Below)

Option 3 : 2 - i, 1 - ii, 4 - iii, 3 - iv

Waste Question 1 Detailed Solution

All human activities produce waste. We all know that such waste may be dangerous and needs safe disposal. 

Bio-medical waste means “any solid and/or liquid waste including its container and any intermediate product, which is generated during the diagnosis, treatment or immunization of human beings or animals or research activities pertaining thereto or in the production or testing of biological or in health camps.

The bio-Medical waste consists of-

  • Human anatomical waste like tissues, organs and body parts
  • Animal wastes generated during research from veterinary hospitals
  • Microbiology and biotechnology wastes
  • Waste sharps like hypodermic needles, syringes, scalpels and broken glass
  • Discarded medicines and cytotoxic drugs
  • Soiled waste such as dressing, bandages, plaster casts, material contaminated with blood, tubes and catheters
  • Liquid waste from any of the infected areas
  • Incineration ash and other chemical wastes

The biomedical waste (BMW) management requires its categorization as a first step. The BMW Rules classify the BMW into the following categories.

CATEGORY TYPE OF WASTE TREATMENT AND DISPOSAL OPTION
Yellow It consists of human tissues, body part Incineration or Plasma Pyrolysis or deep burial 
Red

Contaminated Waste (Recyclable)                   

Wastes generated from disposable items such as tubing, bottles, intravenous tubes and sets, syringes (without needles and fixed needle syringes ), and gloves.

Red coloured non-chlorinated plastic bags or containers. Autoclaving or micro warming is a suitable option for its disposal.
Blue/white Blue plastic bag consist of contaminated glass. White Bag consist of sharp waste including metals.

Disinfection or hydroclaving is a suitable method for blue bag disposal.

Dry heat sterilization or sanitary landfill is a viable option of disposal of white plastic bag.

Black Mostly consist of household/general waste or garbage.  It can be securely left for underground disposal in a secured landfill.

 

Therefore option 3 is the correct answer.

Waste Question 2:

During the physical treatment process of wastewater, what is the correct order of following operations to be followed?

(A) Flocculation

(B) Filtration

(C) Screening

(D) Sedimentation

Choose the correct answer from the options given below :

  1. (A), (D), (B), (A)
  2. (C), (D), (A), (B)
  3. (B), (D), (A), (C)
  4. (B), (C), (D), (A)

Answer (Detailed Solution Below)

Option 2 : (C), (D), (A), (B)

Waste Question 2 Detailed Solution

Wastewater treatment

  • Wastewater treatment is a process used to remove contaminants from wastewater or sewage and convert it into effluent that can be returned to the water cycle with acceptable impact on the environment, or reused for various purposes.
  • Processes like screening, sedimentation, and skimming are used to remove the solids. No chemicals are involved in this process.
  • One of the main techniques of physical wastewater treatment includes sedimentation, which is a process of suspending the insoluble/heavy particles from the wastewater.
  • Water treatment is any process that improves the quality of water to make it appropriate for a specific end-use. The end use may be drinking, industrial water supply, irrigation, river flow maintenance, water recreation, or many other uses, including being safely returned to the environment.
  • The primary treatment works on sedimentation, where solids separate from the water through several different tanks. In contrast, the secondary treatment uses aeration, biofiltration, and the interaction of waste throughout its process.

Key Points

  • Primary or Physical Treatment: It is the process of removal of small and large, floating and suspended solids from sewage through two processes of filtration and sedimentation. The first floating and suspended matter are removed through sequential filtration with progressively smaller pore filters.
  • These include: (1) Collection; (2) Screening and Straining; (3) Chemical Addition; (4) Coagulation and Flocculation; (5) Sedimentation and Clarification; (6) Filtration; (7) Disinfection; (8) Storage; (9) and finally Distribution.

Let's examine these steps in more detail                                                    F1 Pratiksha Shetty Anil 02.03.21 D1

 

 

 

 

 

 

 

 

 

 

Therefore Option 2 is the correct answer.

Waste Question 3:

Which one of the following is a component of a Sewage Treatment Plant (STP)?

  1. UV source
  2. Ion exchanger
  3. Grit chamber
  4. Cyclone

Answer (Detailed Solution Below)

Option 3 : Grit chamber

Waste Question 3 Detailed Solution

wastewater treatment is the removal of contaminants from wastewater, or sewage before it reaches aquifers or natural bodies of water such as rivers, lakes, estuaries, and seas. 

Key Points

  • The components of a sewage treatment plant vary depending on the kind of sewage.
  • Sewage treatment plant components eliminate hazardous elements from wastewater and household sewage before they are released into the environment.
  • STP (Sewage Treatment Plant) components are perfect for removing toxins from wastewater generated by various commercial, industries.
  • Major components of a sewage treatment facility are Bar screens, Grit chambers, comminutors, pre-aeration tanks, main settling tanks, aeration tanks, secondary settling tanks, biological filters, and sludge handlers. 

Therefore, the Grit chamber is a component of a Sewage Treatment Plant (STP).

Additional Information

  • Around 80% of India's water is severely polluted because people dump raw sewage, silt, and garbage into the country's rivers and lakes.
  •  It's estimated that around 70% of surface water in India is unfit for consumption.

Waste Question 4:

Which industrial waste is commonly used in construction industry?

  1. Fly ash
  2. Slag
  3. Sludge
  4. Red oxide

Answer (Detailed Solution Below)

Option 1 : Fly ash

Waste Question 4 Detailed Solution

Industrial waste is a by-product waste produced by industry which includes any material that is rendered useless during a manufacturing process from plants, mills, and mines.

Some examples of industrial waste are silica fume, slag, sludge, fly ash, sandpaper, metals, glass.

Fly ash:

  • It is an industrial waste generated from thermal power plants.
  • It is commonly used in the construction industry.
  • The fly ash has a wider application in the production of the cement.
  • Nowadays all the industries are adding the fly ash 25% in the production of the cement.

Copper slag

Copper slag has high toughness so it can be used to partially replacing the fine aggregate to obtain the durability and the strength. The standard mix ratio has been used for the mortars.

Sludge:

  • It refers to the residual material left from industrial wastewater or sewage treatment processes.
  • The paper industry that uses recycled paper as raw materials has as by-product paper sludge, which has a high content of calcium carbonate, organic materials, and other minerals.
  • Because of its pozzolanic activity, paper sludge can be used as cementitious materials in building industry.

Waste Question 5:

Leachates are 

  1. Persistent Organic Pollutants 
  2. Algae found on eutrophic lakes 
  3. Ozone depleting substances 
  4. Contaminated liquid draining from landfills. 

Answer (Detailed Solution Below)

Option 4 : Contaminated liquid draining from landfills. 

Waste Question 5 Detailed Solution

Key Points 
  • Leachates are indeed contaminated liquids that drain from landfills. As rainwater or other liquids percolate through the waste in landfills, they dissolve various harmful substances, including heavy metals, organic compounds, and nutrients. This contaminated liquid collects at the bottom of the landfill and is referred to as leachate.
  • Persistent Organic Pollutants (POPs) are a specific group of organic chemicals that are resistant to degradation, bioaccumulate in living organisms, and have harmful effects on health and the environment. While leachate can contain some POPs, it's not synonymous with all POPs.
  • Algae found on eutrophic lakes are a consequence of excessive nutrient pollution in the water. While leachate might contribute to nutrient pollution in nearby bodies of water, it's not the same as the algae itself.
  • Ozone depleting substances (ODS) are chemicals that contribute to the depletion of the ozone layer in the stratosphere. Leachate is not known to contain these types of chemicals.

Therefore, based on the definition and description, the most accurate answer for leachates is contaminated liquid draining from landfills.

Waste Question 6:

Which is not bio-waste?

  1. Paper
  2. Vegetable peels
  3. Cow-dung
  4. Slag

Answer (Detailed Solution Below)

Option 4 : Slag

Waste Question 6 Detailed Solution

Concept:

Biodegradable wastes:

  • The wastes that can be degraded or decomposed in nature by the action of different microbes and other living things using processes like composting, aerobic digestion, anaerobic digestion, etc are called Biodegradable wastes.
  • Examples include wood, fruits, vegetables, dead animal and plants, etc.
  • These wastes majorly include organic matter which can be broken down into simpler organic molecules like carbon dioxide, methane, water.
  • However, some Inorganic matters are also included which can be degraded by microbial action like gypsum.

​Non-biodegradable wastes:

  • The wastes that cannot be degraded or decomposed in nature by the action of different microbes and other living things using processes like composting, aerobic digestion, anaerobic digestion, etc are called Non-Biodegradable wastes.
  • These wastes act as a source of environmental pollution.
  • Examples include plastic, glass, metallic wastes, etc.​

​​​​​​​Explanation:

  • Paper, Cow-dung and vegetable peels all come under the category of organic matter which can be easily degraded by microbial action.
  • These things act as natural manure after decomposition and can be used to increase soil fertility.
  • Whereas, 

Slag:

  • Slag is a product of Flux and impurity.
  • Slag is a waste matter separated from metal during smelting and other metallurgical and combustion processes from impurities in the metals.
  • It is not a bio-waste.

Waste Question 7:

Which of the following materials can be commercially recovered during recycling of e-waste?

  1.  Gold
  2.  Copper
  3.  Glass
  4.  Plastic

Select the correct answer using the code given below.

  1. 1, 2 and 3 only
  2. 2, 3 and 4 only
  3. 1 and 4 only
  4. 1, 2, 3 and 4

Answer (Detailed Solution Below)

Option 4 : 1, 2, 3 and 4

Waste Question 7 Detailed Solution

The correct answer is 1, 2, 3, and 4.

Key Points

  • Electronics are full of valuable materials, including copper, tin, iron, aluminum, fossil fuels, titanium, gold, and silver.
  • Many of the materials used in making these electronic devices can be recovered, reused, and recycled—including plastics, metals, and glass.
  • Recycling e-waste enables us to recover various valuable metals and other materials from electronics, saving natural resources (energy), reducing pollution, conserving landfill space, and creating jobs.
  • Recycling one million cell phones can also recover 75 pounds of gold, 772 pounds of silver, 35,274 pounds of copper, and 33 pounds of palladium.

Hence option 4 is correct.

Waste Question 8:

During waste water treatment, large objects like plastic bottles, plastics, and cans are removed by:

  1. Bar screen
  2. Filtration
  3. Aeration
  4. Chlorination

Answer (Detailed Solution Below)

Option 1 : Bar screen

Waste Question 8 Detailed Solution

The correct answer is bar screen.

  • The wastewater entering the sewage plant first passes through the bar screen.
  • The bar screen removes big rubbish like plastic bottles, sanitary napkins, cans, plastic bags, Sticks, etc.

Important Points

  • Wastewater management
    • Wastewater treatment is a process used to remove contaminants and make the water usable.
      • Wastewater Collection
      • Screening
      • Primary Treatment
      • Secondary Treatment
      • Final Treatment
      • Screening
  • Screening is one of the first stages in the process of treating wastewater.
    • In this process, the larger objects are removed from wastewater and then moved into the grit and sand removal tank.
  • Primary treatment
    • Wastewater after the screening is taken for primary treatment where all the organic waste is removed.
    • Primary treatment is done by pouring the wastewater into big tanks for the solid matter to settle at the surface of the tanks.
  • Secondary treatment
    • Water after primary treatment is passed through a tank called ‘aeration lane’’ where the air is tapped into the water to increase the growth of aerobic bacteria.
    • Bacteria break down small particles of sludge that escaped after primary treatment.
  • Final treatment
    • The activated sludge is passed through a bed of sand drying machine where the sludge is dried up and water is filtered out.
    • The water is directed to flow over a wall wherein it gets filtered through the sand bed to eliminate additional particles if any.
    • This water that is filtered is then released into the river.

Waste Question 9:

Which process improves efficiency of solid waste management? 

  1. Processing
  2. Collection
  3. Composting
  4. More than one of the above.
  5. None of the Above

Answer (Detailed Solution Below)

Option 1 : Processing

Waste Question 9 Detailed Solution

  • Waste is unusable material. Waste comes in many forms.
  • Waste can be categorized as:
    • solid waste (vegetable peels, trash cans and other such municipal waste),
    • liquid waste (water discharge from industries, harmful runoff from fields etc),
    • and gaseous waste (harmful gases released from industries).
  • Waste management is a burning problem in urban, industrial and rural areas.
  • Wastes management involves the following steps:
    • Collection of wastes
    • Segregation of wastes
    • Transportation of waste
    • Processing of wastes
    • Disposal of waste

Key Points

Processing of waste:

  • Waste processing and treatment includes a lot of different processes.
  • Processing, by definition, falls under the heading of physical treatment.
  • It uses physical techniques for changing the composition and character of the waste.
  • It includes recycling and sorting.
  • Every recycling process represents a conversion of the material.
  • So the process of recycling is also a process of production of new materials.
  • It describes the process of producing secondary raw material.
  • All these activities conduce to reduce the amount of waste which has to landfill.
  • Of significance in this recycling process is that waste processing starts with separation.
  • Separation of waste at the beginning of the process supports the treatment of the waste and helps to raise the efficiency of the facilities which deals with the waste. 

​Thus, the processing process improves the efficiency of solid waste management.

Waste Question 10:

Rani separated her waste into two groups. 

Group 1: spoiled food, garden trimmings, paper, wood

Group 2: plastic bags, toys, bottles, glass

This segregation is on the basis of:

  1. Group 1: Wet waste, Group 2: Dry waste
  2. Group 1: Dry waste, Group 2: Wet waste
  3. Group 1: Bio Degradable waste, Group 2: Non-Bio Degradable waste
  4. Group 1: Non-Bio Degradable waste, Group 2: Bio Degradable waste

Answer (Detailed Solution Below)

Option 3 : Group 1: Bio Degradable waste, Group 2: Non-Bio Degradable waste

Waste Question 10 Detailed Solution

Key Points

Bio-Degradable:

  • Substances that are broken down by biological processes (bacteria) are said to be biodegradable. 
  • For example all living plants and animals, vegetables and fruits.

Non-Bio- Degradable:

  • Substances that are not broken down by biological processes(bacteria) are said to be non-biodegradable.
  • These substances may be inert and simply persist in the environment for a long time.
  • They may harm the various members of the ecosystem.
  • For example plastics, metals concrete, nylon etc. 

Important Points 

Waste Degradability  Type
Spoiled food Biodegradeable Wet waste
Garden trimmings Biodegradeable Dry waste
Paper Biodegradeable Dry waste
Wood Biodegradeable Dry waste
Plastic bags Non-Biodegradeable  Dry waste
Toys Non-Biodegradeable  Dry waste
Bottles Non-Biodegradeable  Dry waste
Glass Non-Biodegradeable  Dry waste

Thus, 

  • Group 1: spoiled food, garden trimmings, paper, wood - Biodegradeable waste
  • Group 2: plastic bags, toys, bottles, glass - Non-Bio Degradable waste

Additional Information 

Type of Waste Approximate Time is taken to Degenerate Nature of Material
Peels of vegetables and fruits, leftover foodstuff, etc. 1 to 2 weeks Biodegradable
Paper 10 to 30 days Biodegradable
Cotton cloth 2 to 5 months Biodegradable
Wood 10 to15 years Biodegradable
Woollen clothes About a year Biodegradable
Tin, aluminium, and other metal cans 100 to 500 years Non-biodegradable
Plastic bags Several years Non-biodegradable
Synthetic fibre Several years Non-biodegradable
Get Free Access Now
Hot Links: teen patti master plus teen patti diya teen patti apk download