Environmental Health Practice Questions

Q: Liquid chemical waste is discarded in:

Yellow bag. ***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.

Q: Indicators of air pollution are:

Sulphur dioxide, smoke, particulate matter. **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

Q: Which type of waste is classified under 'Yellow' in biomedical waste management?

Human anatomical waste. ***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.

Q: Which method is used to test for chlorine content in drinking water?

Orthotolidine test. ***Orthotolidine test*** - The **orthotolidine test** specifically reacts with chlorine (both free and combined forms) in water to produce a distinct yellow color, the intensity of which can be measured to determine chlorine concentration. - This method is a standard, **colorimetric procedure** widely used for routine monitoring of chlorine residuals in drinking water. *Turbidity test* - A **turbidity test** measures the cloudiness or haziness of a fluid caused by suspended particles, indicating water clarity. - It does not directly measure the presence or concentration of **chlorine**. *Jar test* - The **jar test** is a laboratory procedure used to simulate and optimize coagulation-flocculation processes in water treatment. - It helps determine optimal chemical dosages for removing suspended solids but does not directly test for **chlorine content**. *Coliform test* - The **coliform test** is used to detect the presence of coliform bacteria, which are indicators of potential fecal contamination in water. - This test is a measure of **microbiological quality** and is unrelated to chlorine concentration.

Q: Which of the following is NOT a synthetic pyrethroid compound?

DDT. ***DDT*** - **DDT** (dichlorodiphenyltrichloroethane) is a **chlorinated hydrocarbon insecticide**, not a synthetic pyrethroid. - It was widely used in the past but is now banned in many countries due to its **environmental persistence** and toxicity. *Permethrin* - **Permethrin** is a common **synthetic pyrethroid** used as an insecticide and acaricide, often found in mosquito nets and topical treatments for lice. - It works by disrupting the nervous system of insects, leading to **paralysis and death**. *Prallethrin* - **Prallethrin** is a **synthetic pyrethroid** commonly used in indoor insecticide products, such as mosquito coils and mats. - It is effective against various flying insects and has a **rapid knockdown effect**. *Cypermethrin* - **Cypermethrin** is a **synthetic pyrethroid** widely used in agriculture, public health, and pest control. - It is known for its effectiveness against a broad spectrum of insect pests and its **photostability**.

Q: Which of the following is a standard feature of biomedical waste management?

Yellow bag for human anatomical waste. ***Yellow bag for human anatomical waste*** - **Yellow bags** are designated for **infectious and anatomical waste** as per Biomedical Waste Management Rules 2016 (India). - This includes **human anatomical waste** (tissues, organs, body parts), **animal anatomical waste**, **soiled waste** (items contaminated with blood/body fluids), and **microbiological waste** (laboratory cultures, stocks, specimens). - Yellow bag waste requires treatment by **incineration** or **plasma pyrolysis** followed by disposal to prevent disease transmission. - This is a clearly defined **standard feature** of BMW management. *Red bag for recyclable contaminated waste* - **Red bags** are indeed used for **contaminated recyclable waste** including tubing, bottles, IV sets, and catheters (**non-PVC plastics**). - This is also a standard feature, but the option is less specific as it doesn't mention the non-PVC requirement. - Red bag waste undergoes **disinfection** or **autoclaving** before recycling. *White container for sharp waste* - **White (translucent) puncture-proof containers** are correctly used for **sharps waste** including needles, syringes, scalpel blades, and broken glass. - This is also a standard feature of BMW management. - However, the color coding can vary; some facilities use yellow containers for sharps, making this less universally standardized. *Blue bag for liquid waste* - **Blue bags** are designated for **glassware** (vials, ampoules) and **metallic body implants**, not liquid waste. - **Liquid waste** (blood, body fluids, laboratory chemicals) is collected in leak-proof containers and treated separately through **chemical disinfection** or **effluent treatment plants**. - This option is incorrect.

Q: In the context of water contamination, which chloride level is considered acceptable by WHO standards for drinking water?

250 mg/L. ***250 mg/L*** - The World Health Organization (WHO) guideline for chloride in drinking water states that a concentration of **250 mg/L** is generally considered acceptable. - This level is primarily set for aesthetic reasons, as higher concentrations can impart a detectable **salty taste** to the water, although it is not directly associated with health risks. *100 mg/L* - While a **chloride level of 100 mg/L** is well within safe limits, it is lower than the WHO's typically cited aesthetic guideline. - Water with this concentration would likely have no discernible taste impact from chloride. *150 mg/L* - A chloride level of **150 mg/L** is safe and generally acceptable for drinking water. - However, the WHO guideline for aesthetic acceptability often refers to a slightly higher threshold before taste concerns arise. *200 mg/L* - A chloride concentration of **200 mg/L** is considered safe and generally acceptable according to WHO guidelines before significant taste issues occur. - This value is close to, but not the primary aesthetic guideline limit often cited by WHO.

Q: Which initiative was launched to provide clean cooking fuel to reduce health hazards from smoke exposure?

Ujjwala Yojana. ***Ujjwala Yojana*** - **Pradhan Mantri Ujjwala Yojana (PMUY)** was launched in 2016 to provide **LPG connections** to women from Below Poverty Line (BPL) households - This initiative aims to replace traditional cooking fuels (wood, cow dung, crop residue) that produce harmful smoke, thereby **reducing indoor air pollution** and associated respiratory and other health hazards - Addresses a critical public health issue as indoor air pollution from biomass fuel is a major risk factor for respiratory diseases, cardiovascular disease, and premature mortality *Swachh Bharat Mission* - Primarily focused on **improving sanitation** and waste management across India - Main objective is to eliminate open defecation and improve solid waste management, not directly targeting cooking fuel provision *Smart Cities Mission* - An urban renewal and retrofitting program aimed at making cities sustainable and citizen-friendly - Focuses on infrastructure development, technological integration, and improving quality of urban life, rather than clean cooking fuel *Make in India* - A national program designed to facilitate investment, foster innovation, enhance skill development, and build manufacturing infrastructure - Primary goal is to promote manufacturing within India, not to provide clean cooking fuel

Question 1

Liquid chemical waste is discarded in:

Accepted Answer

Yellow bag

Answer

Red bag

Answer

White bag

Answer

Blue bag

Question 2

Indicators of air pollution are:

Accepted Answer

Sulphur dioxide, smoke, particulate matter

Answer

Sulphur dioxide, lead, particulate matter

Answer

Sulphur dioxide, hydrogen sulphide, carbon monoxide

Answer

Carbon dioxide, hydrogen sulphide, lead

Question 3

Which of the following is the MOST commonly encountered type of waste classified under 'Yellow' category in biomedical waste management?

Accepted Answer

Soiled waste (items contaminated with body fluids like dressings, cotton swabs)

Answer

Anatomical waste, human tissues, organs and body parts

Answer

Chemical liquid waste

Answer

Discarded medicines and cytotoxic drugs

Question 4

Which type of waste is classified under 'Yellow' in biomedical waste management?

Accepted Answer

Human anatomical waste

Answer

Sharp waste

Answer

Plastic waste

Answer

Radioactive waste

Question 5

Which method is used to test for chlorine content in drinking water?

Accepted Answer

Orthotolidine test

Answer

Turbidity test

Answer

Jar test

Answer

Coliform test

Question 6

Which of the following is NOT a synthetic pyrethroid compound?

Accepted Answer

DDT

Answer

Permethrin

Answer

Cypermethrin

Answer

Prallethrin

Question 7

Which of the following is a standard feature of biomedical waste management?

Accepted Answer

Yellow bag for human anatomical waste

Answer

Red bag for recyclable contaminated waste

Answer

White container for sharp waste

Answer

Blue bag for liquid waste

Question 8

In the context of water contamination, which chloride level is considered acceptable by WHO standards for drinking water?

Accepted Answer

250 mg/L

Answer

100 mg/L

Answer

150 mg/L

Answer

200 mg/L

Question 9

What is the minimum chlorine residual commonly recommended to ensure safe drinking water in practical water treatment applications?

Accepted Answer

0.5 mg/L

Answer

2.0 mg/L

Answer

0.2 mg/L

Answer

1.0 mg/L

Question 10

Which initiative was launched to provide clean cooking fuel to reduce health hazards from smoke exposure?

Accepted Answer

Ujjwala Yojana

Answer

Swachh Bharat Mission

Answer

Smart Cities Mission

Answer

Make in India

Environmental Health — MCQs

Environmental Health — MCQs

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