Water Sources and Purification
- Previous year questions on Water Sources and Purification for NEET PG (National Eligibility cum Entrance Test - Postgraduate), from the Community Medicine section of the exam.
- Most questions here come from previous-year papers of Indian postgraduate medical entrance and licensing exams; where a paper and year are recorded the question carries them. The image-based questions are original vignettes written around an openly licensed figure, and were never asked in any exam.
- 20 live questions in Water Sources and Purification.
- Community Medicine is worth about 25 of 300 questions on the exam. See every subject’s weightage.
- Question set last updated 3 Sept 2026.
Q1.Problem village if water is in depth more than?
- A5 mts
- B10 mts
- C15 mts✓ Correct answer
- D20 mts
Q2.Minimum depth for the lining of a sanitary well is
- A5 meters
- B6 meters✓ Correct answer
- C7 meters
- D8 meters
Q3.Quantity of water available per capita considered adequate to meet the needs of all urban domestic purposes?
- A100-150 L
- B150-200 L✓ Correct answer
- C200-250 L
- D250-300 L
Q4.Safe yield of a water supply source is the yield that is adequate for?
- A80% of the year
- B90% of the year
- C95% of the year✓ Correct answer
- DThe whole of the year
Q5.`NALGONDA technique' is used in -
- AEndemic-fluorosis✓ Correct answer
- BEpidemic-dropsy
- CEndemic-ascites
- DNcurolathyrisin
Q6.Swajaldhara yojana is to provide -
- ANutrition
- BWater✓ Correct answer
- CPension
- DSickness Benefits
Q7.Temporary and permanent removed by –
- ABoiling
- BAddition of lime
- CPermutit method✓ Correct answer
- DAll
Q8.Nalgonda technique is related to?
- AFluorine✓ Correct answer
- BChrlorine
- CNitrate
- DNitrites
Q9.Vital layer in slow sand filter is seen:
- AOn top of the water
- BOn the sand bed✓ Correct answer
- CJust below the supernatant water
- DNone of the above
Q10.All are “Water-Washed Diseases” except
- AScabies
- BTrachoma
- CConjunctivitis
- DTyphoid✓ Correct answer
Answer key
Q1: C. 15 mts; Q2: B. 6 meters; Q3: B. 150-200 L; Q4: C. 95% of the year; Q5: A. Endemic-fluorosis; Q6: B. Water; Q7: C. Permutit method; Q8: A. Fluorine; Q9: B. On the sand bed; Q10: D. Typhoid.
Other topics in Community Medicine
- Evolution of Medicine
- Determinants and Indicators of Health
- Disease Concepts and Levels of Prevention
- Epidemiological Principles
- Descriptive Study Designs
- Analytical Study Designs: Case-Control and Cohort
- Experimental and Trial Designs
- Core Terminology in Infectious Disease Epidemiology
- Disease Transmission Dynamics
- Immunization and Vaccination Principles
- Vaccine Manufacture and Cold Chain Storage
- Disinfection and Sterilization Methods
- Screening
- Respiratory Infections of Viral Origin
- Respiratory Infections of Bacterial Origin
- Enteric and Intestinal Infections
- Arthropod-Transmitted Infections
- Viral Zoonoses
- Bacterial and Parasitic Zoonoses
- Sexually Transmitted and Surface Infections
- Cardiovascular Disease and Diabetes
- Cancer, Obesity and Blindness
- National Health Programmes: NVBDCP
- National Health Programmes: NLEP, NTEP and NACO
- National Health Programmes: NIS, JSY, RBSK and Others
- Demographic Cycle, Growth Rate and Age Pyramid
- Demographic Indicators
- Family Planning
- Preventive Care in Pregnancy, Childhood and Old Age
- Macronutrients and Energy Requirements
- Vitamins, Minerals and Water
- Food Processing, Safety and Quality
- Sociological and Psychological Concepts
- Social Structure and Health Economics
- Water Disinfection
- Water Quality Standards
- Climate and Environmental Meteorology
- Housing Standards and Ventilation
- Lighting, Noise and Radiation
- Refuse and Sewage Disposal
- Mosquitoes and Flies as Disease Vectors
- Ticks, Fleas and Mites as Disease Vectors
- Pest and Vector Control Measures
- Handling and Disposal of Biomedical Waste
- Disaster Preparedness and Response
- Occupational Diseases and Hazards
- ESI Scheme and the Factories Act
- Health Education and Communication Methods
- Planning and Management of Health Services
- Health Service Delivery in India
- Global Health and International Agencies
- Probability and Types of Data
- Measures of Central Tendency
- Measures of Variability and Dispersion
- Measures of Position: Percentiles and Z-Scores
- Principles of Inferential Statistics
- Hypothesis Testing Concepts
- Significance Testing Methods
- Correlation and Regression Techniques
- Clinical Research Design and Applied Biostatistics
- Community Mental Health
- Genetics in Public Health