NEET-PG 2015 - Community Medicine Practice Questions

Q: Which of the following statements about pathogenic mosquitoes is correct?

Anopheles mosquitoes are known for transmitting malaria.. ***Correct: Anopheles mosquitoes are known for transmitting malaria.*** - **Anopheles mosquitoes** are the **primary and only vectors** for **malaria**, a parasitic disease caused by Plasmodium parasites. - They transmit the parasite through their **saliva** when they bite humans, typically during **dusk and dawn**. - This is the most significant pathogenic association among the options. *Incorrect: Mansonia mosquitoes lay their eggs in rafts.* - **Mansonia mosquitoes** lay their eggs in **clusters attached to underwater parts of aquatic plants**, not in rafts. - **Culex mosquitoes** are the ones that lay their eggs in **raft-like formations** on water surfaces. *Incorrect: Culex mosquitoes are primarily vectors for West Nile virus.* - While **Culex mosquitoes** can transmit West Nile virus, in the **Indian context** they are primarily known as vectors for **lymphatic filariasis** (Wuchereria bancrofti) and **Japanese encephalitis**. - West Nile virus is more relevant in Western countries and is not the primary disease association for Culex in India. *Incorrect: Aedes mosquitoes are known for their distinctive black and white striped markings.* - While **Aedes aegypti** and **Aedes albopictus** do have **black and white striped markings**, this is a **morphological characteristic** rather than a primary **pathogenic association**. - The question asks about pathogenic mosquitoes, and Aedes is better characterized by its **disease transmission** (dengue, Zika, chikungunya, yellow fever) rather than its appearance. - As a pathogenic mosquito, its **daytime biting behavior** and **urban breeding habits** are more relevant than its markings.

Q: Which of the following statements about Culex larvae is correct?

Siphon tube present. ***Siphon tube present*** - **Culex larvae** possess a prominent **siphon tube** at their posterior end, which is used for breathing by extending to the water surface. - This **siphon tube** is a key morphological feature that helps distinguish them from *Anopheles* larvae. *Rest parallel to surface water* - **Anopheles larvae** typically rest parallel to the water surface because they lack a long siphon and obtain oxygen directly through spiracles on their dorsal surface. - **Culex larvae**, due to their siphon tube, hang head-down at an angle from the water surface. *Long Palmate hair* - **Palmate hairs** are characteristic structures found on the abdomen of **Anopheles larvae** that help them float horizontally at the water surface. - **Culex larvae** do not possess well-developed palmate hairs. *All are false* - This statement is incorrect because the presence of a **siphon tube** is a defining characteristic of **Culex larvae**.

Q: Horrock's apparatus is used to measure?

Chlorine demand. ***Chlorine demand*** - Horrock's apparatus is specifically designed for determining the **chlorine demand** of water, which is the amount of **chlorine** consumed by impurities before a **free chlorine residual** is established. - This apparatus is crucial in **water treatment processes** to ensure effective **disinfection** by adjusting chlorine dosages. *Wind velocity* - **Wind velocity** is typically measured using an **anemometer**, a device with rotating cups or a propeller that spins in response to wind. - Horrock's apparatus has no components or mechanisms for detecting or quantifying wind movement. *Humidity* - **Humidity** is measured by instruments such as **hygrometers** or **psychrometers**, which assess the amount of water vapor in the air. - These devices utilize properties like **condensation** or changes in **electrical resistance**, which are unrelated to the function of Horrock's apparatus. *Cooling power* - **Cooling power** refers to the rate at which heat can be removed from a system and is measured using devices like **catathermometers** or specialized **calorimeters**. - Horrock's apparatus is a **chemical testing device** and does not have the capability to measure thermal properties or cooling rates.

Q: Which indicator is used in Horroch's apparatus?

Starch iodine. ***Starch iodine*** - Horroch's apparatus is specifically designed for testing the **sterilizing efficiency of hypochlorite solutions** in dairies. - **Starch iodine** (starch-iodide paper) is used as an indicator because it reacts with residual free chlorine to produce a **blue-black color**, which confirms that adequate free chlorine is present for effective sterilization. - The principle: Free chlorine oxidizes iodide to iodine, which then reacts with starch to give the characteristic blue color. *Bleaching powder* - **Bleaching powder** (calcium hypochlorite) is the active ingredient in hypochlorite sterilizing solutions being tested, not an indicator itself. - It's the substance whose sterilizing efficacy is being evaluated using the apparatus. *Soda-lime* - **Soda-lime** is primarily used as an absorbent for **carbon dioxide (CO2)** and other acidic gases in various laboratory and anesthetic applications. - It has no role as an indicator in Horroch's apparatus for testing hypochlorite solutions. *Potassium permanganate* - **Potassium permanganate** is a strong oxidizing agent often used as an indicator in redox titrations, as its deep purple color disappears when reduced. - It is not suitable for indicating residual chlorine in Horroch's test, which specifically relies on the starch-iodine reaction.

Q: Waste Sharps should be disposed in ?

Yellow bag. ***Yellow bag (Historical answer per BMW Rules 1998)*** - Under the **Biomedical Waste Management Rules 1998** (applicable at the time of NEET-PG 2015), **sharps waste** including needles, syringes, and scalpels were disposed in **yellow puncture-proof containers**. - This was the correct answer when this question was asked in the 2015 examination. - **Current Guidelines (BMW Rules 2016):** Sharps are now disposed in **white/translucent puncture-proof containers**, NOT yellow bags. Yellow bags are currently used for soiled infectious waste like dressings and body fluid-contaminated materials. *Black bag* - **Black bags** are used for **general non-hazardous waste** that poses no biological risk. - Disposing of sharps in black bags creates serious **risk of needlestick injuries** and potential transmission of bloodborne pathogens. *None of the options* - This is incorrect because there is a specific, regulated method for disposing of sharps in healthcare settings. - Proper waste segregation is **mandatory** for safety and regulatory compliance. *Blue bag* - **Blue bags** (per BMW Rules 2016) are used for disposal of **glassware** (broken or discarded) and **metallic body implants**. - Under older guidelines, blue bags were for certain pharmaceutical waste. - They are not designated for sharps disposal.

Q: Which category waste is disposed in red bags?

Contaminated recyclable waste (Category 3). ***Contaminated recyclable waste (Category 3)*** - **Red bags** are specifically designated for the disposal of **contaminated recyclable waste**, which includes items like tubing, catheters, intravenous sets, and soiled plastic bottles. - This waste is often contaminated with blood or body fluids but can be sterilized and recycled after proper treatment. *Human anatomical waste (Category 1)* - **Human anatomical waste**, such as tissues, organs, body parts, and fetuses, is typically disposed of in **yellow bags**. - This category usually requires incineration or deep burial due to its biological hazard. *Glassware and metallic implants (Category 2)* - **Glassware** (e.g., broken glass, used vials) and **metallic implants** (e.g., orthopedic implants) are typically disposed of in puncture-proof containers, often **blue** or transparent bins, for safe handling and potential recycling. - These items are separated to prevent injuries and facilitate specific recycling or treatment methods. *Pharmaceutical waste (Category 4)* - **Pharmaceutical waste** includes discarded medicines, expired drugs, and cytotoxic drugs, and it is usually collected in **yellow bags** or designated labeled containers. - Its disposal requires specific chemical treatment, incineration, or secure landfilling to prevent environmental contamination.

Q: Which of the following is not typically incinerated?

Broken thermometers. ***Broken thermometers*** - **Broken thermometers** often contain **mercury**, which, when incinerated, releases **toxic mercury vapor** into the atmosphere. - This poses a severe environmental and health hazard, requiring them to be handled as **hazardous waste** and recycled or disposed of in specialized facilities to prevent mercury release. *Human anatomical waste* - **Human anatomical waste**, including body parts, tissues, and recognizable organs, is highly infectious and poses significant biohazard risks. - **Incineration** is the preferred method for its disposal to ensure complete destruction of pathogens and reduce environmental contamination. *Animal waste* - **Animal waste** from research or healthcare settings (e.g., infected animal carcasses, bedding with animal excreta) is considered **biohazardous**. - **Incineration** effectively neutralizes pathogens and reduces the volume of such waste, preventing disease transmission. *Infected solid waste* - **Infected solid waste**, such as bandages, swabs, and disposable medical devices contaminated with blood or bodily fluids, carries a high risk of spreading infectious diseases. - **Incineration** at high temperatures ensures sterilization and safe disposal of these materials, destroying pathogenic microorganisms.

Q: In immediate disaster response management (first 24-48 hours), which of the following is not typically practiced?

Mass vaccination. ***Mass vaccination*** - **Mass vaccination** is typically a strategy for **preparedness/prevention phase** or **post-disaster disease prevention**, not an immediate disaster response activity. - Immediate disaster response focuses on **saving lives, providing emergency medical care, establishing shelter, and restoring critical infrastructure**, rather than large-scale preventative health campaigns. - Mass vaccination requires **planning, logistics, cold chain management**, which are incompatible with chaotic immediate response scenarios. *Triage* - **Triage** is a **critical and immediate** component of disaster response, involving the **prioritization of injured patients** for treatment based on severity and survival likelihood. - It ensures limited resources are allocated effectively to **maximize lives saved** during the acute phase. - Typically uses **color-coded tags** (red-immediate, yellow-delayed, green-minor, black-deceased). *Rehabilitation* - While **rehabilitation** is part of the **recovery phase** (weeks to months post-disaster), **early rehabilitation activities** may begin during the immediate response period. - Basic rehabilitation services like **mobility aids, psychological first aid**, can be initiated alongside acute care. - This makes it partially practiced even in immediate response, unlike mass vaccination which is never immediate. *Search and rescue* - **Search and rescue** is the **primary immediate response activity**, focusing on locating and extracting survivors from disaster-affected areas. - Time-critical operation following the **"golden period"** principle where survival rates decrease rapidly after 72 hours. - Involves specialized teams with equipment for **debris removal, victim location, and emergency extraction**.

Q: Which of the following statements about Anganwadi workers is incorrect?

Covers a population of 2000. ***Covers a population of 2000*** - An **Anganwadi center** typically covers a population of **1000** in rural and urban areas, and **700** in tribal areas, not 2000. - This statement is incorrect because the specified population coverage is double the standard norm for an Anganwadi center. *Mostly female* - The vast majority of **Anganwadi workers** are **women** from the local community. - This is a correct statement, reflecting the gender composition of the Anganwadi workforce. *Training for 40 days* - **Anganwadi workers** undergo an initial **training program of 40 days**. - This statement is correct, outlining the standard duration of their foundational training. *Under ICDS scheme* - **Anganwadi centers** are a crucial part of the **Integrated Child Development Services (ICDS) scheme**. - This statement is correct, as the ICDS scheme established and oversees Anganwadi centers to provide health, nutrition, and early childhood education services.

Q: According to the ICDS scheme, what is the recommended population range for establishing one Anganwadi centre in rural areas?

400-800 (Rural). ***400-800 (Rural)*** - The **Integrated Child Development Services (ICDS)** scheme recommends one Anganwadi centre for a population of **400-800** in **rural areas**. - This is the **standard population norm** as per ICDS guidelines for establishing Anganwadi centres in typical rural settings. - This ensures adequate coverage and accessibility of ICDS services (nutrition, immunization, health check-ups, and preschool education) for mothers and children. *700-1000 (Urban)* - This population range (**700-1000**) is the standard norm for **urban areas**, not rural areas. - Urban areas have higher population density, hence a slightly larger population range is used per Anganwadi centre. - The question specifically asks about **rural areas**, making this option incorrect. *300-800 (Hilly/Tribal areas)* - This range (**300-800**) is designated for **hilly, difficult terrain, or specific tribal areas** where geographical challenges and scattered populations require lower population norms. - While this includes rural characteristics, it represents **special category areas**, not standard rural areas as asked in the question. *1000-1500 (Urban high density)* - A population target of **1000-1500** would be too high even for standard urban norms and doesn't align with official ICDS guidelines. - This is not applicable to **rural areas** as specified in the question.

Question 1

Which of the following statements about pathogenic mosquitoes is correct?

Accepted Answer

Anopheles mosquitoes are known for transmitting malaria.

Answer

Mansonia mosquitoes lay their eggs in rafts.

Answer

Culex mosquitoes are primarily vectors for West Nile virus.

Answer

Aedes mosquitoes are known for their distinctive black and white striped markings.

Question 2

Which of the following statements about Culex larvae is correct?

Accepted Answer

Siphon tube present

Answer

Rest parallel to surface water

Answer

Long Palmate hair

Answer

All are false

Question 3

Horrock's apparatus is used to measure?

Accepted Answer

Chlorine demand

Answer

Wind velocity

Answer

Humidity

Answer

Cooling power

Question 4

Which indicator is used in Horroch's apparatus?

Accepted Answer

Starch iodine

Answer

Potassium permanganate

Answer

Bleaching powder

Answer

Soda-lime

Question 5

Waste Sharps should be disposed in ?

Accepted Answer

Yellow bag

Answer

Black bag

Answer

None of the options

Answer

Blue bag

Question 6

Which category waste is disposed in red bags?

Accepted Answer

Contaminated recyclable waste (Category 3)

Answer

Glassware and metallic implants (Category 2)

Answer

Human anatomical waste (Category 1)

Answer

Pharmaceutical waste (Category 4)

Question 7

Which of the following is not typically incinerated?

Accepted Answer

Broken thermometers

Answer

Animal waste

Answer

Infected solid waste

Answer

Human anatomical waste

Question 8

In immediate disaster response management (first 24-48 hours), which of the following is not typically practiced?

Accepted Answer

Mass vaccination

Answer

Rehabilitation

Answer

Triage

Answer

Search and rescue

Question 9

Which of the following statements about Anganwadi workers is incorrect?

Accepted Answer

Covers a population of 2000

Answer

Training for 40 days

Answer

Under ICDS scheme

Answer

Mostly female

Question 10

According to the ICDS scheme, what is the recommended population range for establishing one Anganwadi centre in rural areas?

Accepted Answer

400-800 (Rural)

Answer

700-1000 (Urban)

Answer

1000-1500 (Urban high density)

Answer

300-800 (Hilly/Tribal areas)

NEET-PG 2015 — Community Medicine