Environmental Health — MCQs
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Human anatomical waste, animal waste, soiled waste and discarded medicines are disposed in which color bag?
Day light factor in living room should be?
Which category of hospital waste accounts for 30% of the total waste?
Body fluids are classified under which category of waste
Blood bag is discarded in:
For the population of 10,000, how much area is required per year for a trench method sanitary landfill pit of 2m depth?
Liquid chemical waste is discarded in:
Indicators of air pollution are:
Which of the following is the MOST commonly encountered type of waste classified under 'Yellow' category in biomedical waste management?
Which type of waste is classified under 'Yellow' in biomedical waste management?
Environmental Health Indian Medical PG Practice Questions and MCQs
Question 681: Human anatomical waste, animal waste, soiled waste and discarded medicines are disposed in which color bag?
- A. Yellow (Correct Answer)
- B. Green
- C. Blue
- D. Black
Explanation: ***Yellow*** - **Yellow bags** are designated for the disposal of **infectious non-biodegradable biomedical waste** that requires **incineration or plasma pyrolysis**. - This includes **human anatomical waste** (tissues, organs), **animal anatomical waste**, **soiled waste** (items contaminated with blood/body fluids), and **expired or discarded medicines**. - This color coding as per Bio-Medical Waste Management Rules 2016 ensures proper segregation and treatment, preventing environmental contamination and infection spread. *Green* - **Green bags** are used for **biodegradable waste** that can be treated through **composting or biological treatment**. - This includes general food waste, kitchen waste, and non-infectious biodegradable materials from healthcare facilities. - Green bag waste does not require incineration. *Blue* - **Blue bags** or containers are used for **glassware** and **metallic body implants**. - They contain waste that can be recycled after proper disinfection through autoclaving or microwaving. - Not meant for soiled or anatomical waste. *Black* - **Black bags** are designated for **general non-hazardous solid waste** including discarded medicines with low heavy metal content. - This typically includes office waste, food wrappers, and other non-infectious general refuse from administrative areas. - Does not include anatomical or soiled waste.
Question 682: Day light factor in living room should be?
- A. 15%
- B. 10%
- C. 2% (Correct Answer)
- D. 8%
Explanation: ***2%*** - A Day Light Factor (DLF) of **2%** is the **standard recommended value** for living rooms as per Bureau of Indian Standards and public health guidelines - This value ensures **adequate natural illumination** for general household activities while maintaining visual comfort - Provides sufficient daylight for most daily activities without excessive glare or heat gain - Meets the minimum lighting standards for residential spaces as taught in **Community Medicine** for Indian Medical PG exams *15%* - A DLF of **15%** is excessively high for living rooms and would cause severe **glare** and **visual discomfort** - Such high values are reserved for **operating theaters** or specialized medical facilities requiring very intense illumination - Would result in excessive heat gain and poor energy efficiency in residential settings *10%* - A DLF of **10%** is far too high for living rooms and more appropriate for **workshops** or **laboratories** - Would cause significant glare, discomfort, and increased cooling requirements - This value exceeds residential comfort standards and energy efficiency guidelines *8%* - A DLF of **8%** is also excessively high for living rooms - While lower than 10-15%, it still exceeds recommended residential standards by **4 times** - More suitable for specialized task areas requiring high illumination levels, not general living spaces
Question 683: Which category of hospital waste accounts for 30% of the total waste?
- A. General waste
- B. Paper waste
- C. Infectious waste (Correct Answer)
- D. Plastic waste
Explanation: ***Infectious waste*** - **Infectious waste** includes items contaminated with blood, body fluids, or other potentially infectious materials, such as microbiology laboratory waste, anatomical waste, and sharps. - According to WHO guidelines, infectious waste typically accounts for approximately **10-15%** of total healthcare waste. - **Note:** Some older references cite higher percentages (20-30%), but current international data consistently shows infectious waste comprises 10-15% of hospital waste streams. - This is the closest standard category to the 30% figure mentioned in the question, though the actual percentage is lower. *General waste* - **General waste** comprises items similar to domestic waste that have not been in contact with patients or infectious materials, such as office paper, packaging, and food waste. - General waste makes up the largest proportion of hospital waste, typically accounting for **75-85%** of the total. *Paper waste* - **Paper waste** is a sub-category of general waste and includes documentation, cardboard, and packaging materials. - As a subset of general waste, it does not independently represent a distinct waste management category for percentage calculations. *Plastic waste* - **Plastic waste** includes disposable items like gowns, syringes, IV sets, and packaging materials. - Plastic is distributed across both general and infectious waste categories and is not classified as a separate percentage category in standard hospital waste management systems.
Question 684: Body fluids are classified under which category of waste
- A. Humanized waste
- B. Pathological waste
- C. Anatomical waste
- D. Infectious waste (Correct Answer)
Explanation: ***Infectious waste*** - Body fluids such as **blood, urine, body secretions, and other liquid waste** from patients are classified as **infectious waste** under Bio-Medical Waste Management Rules. - These materials are considered **potentially infectious** and require proper disinfection (chemical or thermal) before disposal. - Body fluids must be treated with **chemical disinfectants** (1% hypochlorite solution) before being discharged into drainage systems. *Pathological waste* - This category specifically includes **recognizable human tissues, organs, and body parts** removed during surgery, autopsy, or medical procedures. - While pathological waste may contain body fluids, **bulk body fluids themselves** are not classified under this category. - Pathological waste falls under **Yellow category** (Category 1) of BMW Rules 2016. *Anatomical waste* - Anatomical waste refers to **recognizable human or animal body parts, tissues, and organs**. - This is essentially synonymous with pathological waste in current BMW classification. - **Body fluids alone** do not constitute anatomical waste. *Humanized waste* - This is **not a recognized category** in standard Bio-Medical Waste Management classification systems. - The correct categories under BMW Rules 2016 are based on color-coded segregation (Yellow, Red, White, Blue).
Question 685: Blood bag is discarded in:
- A. Red bag
- B. White bag
- C. Yellow bag (Correct Answer)
- D. Blue bag
Explanation: ***Yellow bag*** - The **yellow bag** is designated for **infectious waste** including human anatomical waste, soiled waste, expired medicines, and **items contaminated with blood and body fluids**. - **Blood bags** are disposed in yellow bags as they contain blood and body fluids, making them **infectious/biohazardous waste**. - According to Biomedical Waste Management Rules, items contaminated with blood fall under Category 1 (Yellow bag) waste. - This ensures safe handling and disposal of potentially infectious materials to prevent pathogen transmission. *Red bag* - The red bag is used for **contaminated recyclable plastic waste** such as tubing, IV sets without fluids, catheters, and plastic bottles. - While blood bags are plastic, their **biohazardous content (blood)** classifies them as infectious waste rather than recyclable contaminated plastic. - Red bag items undergo recycling after disinfection, which is not appropriate for blood-contaminated items. *White bag* - A **white/translucent bag** is used for **sharp waste** including needles, syringes with fixed needles, scalpels, and blades. - Blood bags are not sharp objects and do not pose puncture risk, hence not disposed in white bags. *Blue bag* - The **blue bag** is used for **glassware waste** including broken/unbroken contaminated glass vials and ampoules. - Blood bags are made of plastic, not glass, and their primary hazard is infectious content, not material type.
Question 686: For the population of 10,000, how much area is required per year for a trench method sanitary landfill pit of 2m depth?
- A. 3 acres
- B. 4 acres
- C. 2 acres
- D. 1 acre (Correct Answer)
Explanation: ***1 acre*** - For a **trench method sanitary landfill** with a 2m depth, the required area per year for a population of 10,000 is approximately **1 acre**. - This estimation accounts for the typical volume of solid waste generated by this population size and the compaction achieved in well-managed landfills. *3 acres* - An area of **3 acres** would be significantly larger than typically required for a population of 10,000 for a 2m deep trench landfill. - This might be needed for a much larger population, less compaction, or a shallower landfill depth. *4 acres* - **4 acres** is an excessive amount of land for the stated population and landfill depth, suggesting inefficiency or a miscalculation in waste volume or density. - Such a large area would likely imply either very low waste compaction or a much larger population than specified. *2 acres* - While closer than 3 or 4 acres, **2 acres** is still generally more than what is needed for a 10,000 population with a 2m deep trench landfill. - This could be considered if the waste generation rate is higher than average or if compaction is less efficient.
Question 687: Liquid chemical waste is discarded in:
- A. Yellow bag (Correct Answer)
- B. Red bag
- C. White bag
- D. Blue bag
Explanation: ***Yellow bag*** - **Liquid chemical waste** including laboratory reagents, disinfectants, and expired chemicals must be segregated and collected in a **yellow bag or container** as per **Bio-Medical Waste Management Rules, 2016 (India)**. - Yellow bags are designated for **infectious and hazardous waste** including chemical waste, expired medicines, and anatomical waste. - This ensures proper handling through **incineration or chemical treatment** to prevent environmental contamination. *Red bag* - **Red bags** are used for **contaminated waste (recyclable)** including items contaminated with blood or body fluids that are not highly infectious. - This includes tubing, bottles, intravenous sets, and catheters that can be autoclaved and recycled. - Red bag waste undergoes **autoclaving/microwaving** followed by shredding before disposal. *White bag* - **White or translucent puncture-proof containers** are designated for **sharps waste** including needles, syringes, scalpels, and blades. - These containers prevent needlestick injuries and ensure safe handling of sharp objects. - Not suitable for liquid chemical waste which requires yellow bag disposal. *Blue bag* - **Blue/white puncture-proof containers** are used for **sharps including metallic body implants** and glassware that may cause injury. - In the Indian BMW system, blue and white containers serve similar purposes for sharps waste. - Not designated for liquid chemical waste, which belongs in yellow bags.
Question 688: Indicators of air pollution are:
- A. Sulphur dioxide, lead, particulate matter
- B. Sulphur dioxide, hydrogen sulphide, carbon monoxide
- C. Carbon dioxide, hydrogen sulphide, lead
- D. Sulphur dioxide, smoke, particulate matter (Correct Answer)
Explanation: **Correct Option: Sulphur dioxide, smoke, particulate matter** - **Sulphur dioxide (SO₂)** is a major gaseous air pollutant indicator, primarily from fossil fuel combustion and industrial processes - **Smoke** (composed of small solid and liquid particles) is a visible indicator of air pollution - **Particulate matter (PM2.5 and PM10)** represents suspended particulate matter (SPM), significant contributors to air pollution causing respiratory and cardiovascular issues - These three parameters are the **standard indicators** used for air quality monitoring as per NAAQS (National Ambient Air Quality Standards) *Incorrect: Sulphur dioxide, lead, particulate matter* - While SO₂ and particulate matter are correct indicators, **lead** is a toxic heavy metal pollutant but not a standard indicator for routine air quality monitoring - Lead pollution is typically measured separately as a specific hazardous pollutant *Incorrect: Sulphur dioxide, hydrogen sulphide, carbon monoxide* - SO₂ and CO are air pollutants, but **hydrogen sulphide (H₂S)** is more associated with specific industrial emissions and sewage decomposition - This combination misses the critical indicators of **smoke and particulate matter** which are more ubiquitous and routinely monitored *Incorrect: Carbon dioxide, hydrogen sulphide, lead* - **Carbon dioxide (CO₂)** is primarily a greenhouse gas contributing to climate change, not a conventional air pollution indicator for local air quality - H₂S and lead are pollutants but not standard routine indicators - This option lacks the key indicators: SO₂, smoke, and particulate matter
Question 689: Which of the following is the MOST commonly encountered type of waste classified under 'Yellow' category in biomedical waste management?
- A. Anatomical waste, human tissues, organs and body parts
- B. Soiled waste (items contaminated with body fluids like dressings, cotton swabs) (Correct Answer)
- C. Chemical liquid waste
- D. Discarded medicines and cytotoxic drugs
Explanation: ***Soiled waste (items contaminated with body fluids like dressings, cotton swabs)*** - **Soiled waste** represents a very common category of biomedical waste, produced in large quantities in healthcare settings from patient care activities. - Items like **dressings, cotton swabs, and bandages** frequently become contaminated with body fluids, requiring disposal in the yellow category directly after use. *Anatomical waste, human tissues, organs and body parts* - While also classified under the yellow category, **anatomical waste** (e.g., organs, tissues) is generated from surgical procedures, biopsies, and autopsies, and its volume is generally less than that of daily soiled dressings. - This type of waste often requires specific handling and disposal methods, such as **incineration or deep burial**. *Chemical liquid waste* - **Chemical liquid waste**, though yellow category, is generated less frequently and in smaller quantities compared to soiled waste, primarily from laboratory reagents, disinfectants, and cleaning agents. - It requires specific treatment based on its chemical properties, distinct from the handling of soiled or anatomical waste. *Discarded medicines and cytotoxic drugs* - **Discarded medicines and cytotoxic drugs** are yellow category waste, but their volume is significantly lower than that of soiled waste, and they require highly specialized and controlled disposal methods due to their hazardous nature. - These include expired or unused pharmaceutical preparations and drugs used in **chemotherapy**.
Question 690: Which type of waste is classified under 'Yellow' in biomedical waste management?
- A. Sharp waste
- B. Plastic waste
- C. Radioactive waste
- D. Human anatomical waste (Correct Answer)
Explanation: ***Human anatomical waste*** - **Yellow biomedical waste** includes all human anatomical waste such as body parts, tissues, organs, and placentas. - It also encompasses animal anatomical waste, soiled waste, expired or discarded medicines, chemical waste, and microbiology/biotechnology waste. *Sharp waste* - **Sharp waste**, such as needles, syringes with fixed needles, scalpels, and blades, is typically disposed of in **puncture-proof containers**, which are often colored **blue** or labeled with a universally recognized biohazard symbol. - This is to prevent injuries and the spread of infections from contaminated sharps. *Plastic waste* - **Plastic waste** from the medical setting, such as intravenous bags, tubing, catheters, and urine bags, is usually categorized under **red biomedical waste**. - Red-bagged waste is often incinerated, autoclaved, or sent for chemical disinfection depending on the regulations and specific type of plastic. *Radioactive waste* - **Radioactive waste** is a highly specialized category of waste, distinct from standard biomedical waste, and requires strict management protocols. - It is often managed under the guidelines for handling radioactive materials and typically involves specific shielding, decay in storage, or dedicated disposal facilities, not general biomedical waste classification colors.
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