1. What is the primary goal of environmental health?
(A) Increase industrial production
(B) Build more roads
(C) Protect human health by controlling environmental factors
(D) Promote tourism
2. Environmental health mainly deals with:
(A) Sports management
(B) Banking services
(C) Stock markets
(D) Physical, biological, and chemical factors affecting health
3. Which organization plays a leading role in global environmental health?
(A) UNESCO
(B) FIFA
(C) IMF
(D) WHO
4. Which of the following is an environmental health hazard?
(A) Playing games
(B) Reading books
(C) Air pollution
(D) Watching television
5. The main source of indoor air pollution in rural areas is:
(A) Computers
(B) Biomass fuel burning
(C) Mobile phones
(D) Refrigerators
6. Which gas is primarily responsible for the greenhouse effect?
(A) Oxygen (O₂)
(B) Carbon dioxide (CO₂)
(C) Nitrogen (N₂)
(D) Helium (He)
7. Acid rain is mainly caused by:
(A) Hydrogen and helium
(B) Oxygen and nitrogen
(C) Sulfur dioxide and nitrogen oxides
(D) Carbon monoxide only
8. Safe drinking water should be:
(A) Warm only
(B) Salty
(C) Colored
(D) Free from harmful microorganisms
9. Chlorination of water is mainly done to:
(A) Increase minerals
(B) Improve taste only
(C) Kill disease-causing microorganisms
(D) Reduce temperature
10. Which disease is commonly spread through contaminated water?
(A) Arthritis
(B) Diabetes
(C) Hypertension
(D) Cholera
11. Which is a waterborne disease?
(A) Epilepsy
(B) Asthma
(C) Migraine
(D) Typhoid fever
12. Improper disposal of solid waste can lead to:
(A) Better sanitation
(B) Spread of diseases
(C) Improved air quality
(D) Increased crop production
13. The most preferred method of waste management is:
(A) Open burning
(B) Open dumping
(C) Reduce, Reuse, Recycle
(D) Throwing waste into rivers
14. Biomedical waste should be:
(A) Mixed with household waste
(B) Properly segregated and treated
(C) Burned openly
(D) Dumped in rivers
15. Which color bag is commonly used for infectious biomedical waste?
(A) Black
(B) Blue
(C) Yellow
(D) Green
16. Noise pollution mainly affects:
(A) Hearing
(B) Vision only
(C) Digestion only
(D) Hair growth
17. Prolonged exposure to loud noise may cause:
(A) Improved memory
(B) Hearing loss
(C) Better eyesight
(D) Weight gain
18. Which vector spreads malaria?
(A) Housefly
(B) Female Anopheles mosquito
(C) Cockroach
(D) Flea
19. Dengue fever is transmitted by:
(A) Housefly
(B) Sandfly
(C) Aedes mosquito
(D) Tick
20. Which insect is commonly associated with the spread of typhoid and diarrhea?
(A) Housefly
(B) Butterfly
(C) Honeybee
(D) Grasshopper
21. The process of destroying disease-causing microorganisms is called:
(A) Filtration
(B) Disinfection
(C) Sedimentation
(D) Composting
22. Which is an example of chemical water disinfection?
(A) Boiling
(B) Chlorination
(C) Filtration
(D) Sedimentation
23. Boiling water makes it safer by:
(A) Killing most microorganisms
(B) Increasing pollution
(C) Adding chemicals
(D) Changing its color
24. Sanitary landfill is a method of:
(A) Food preservation
(B) Water purification
(C) Solid waste disposal
(D) Air pollution control
25. Which of the following is biodegradable?
(A) Plastic bottle
(B) Vegetable peels
(C) Glass
(D) Aluminum can
26. Which is a non-biodegradable waste?
(A) Plastic bag
(B) Fruit peel
(C) Leaves
(D) Paper towel
27. Environmental sanitation helps to:
(A) Reduce food production
(B) Increase pollution
(C) Prevent disease transmission
(D) Increase noise pollution
28. Proper sewage disposal prevents:
(A) Soil formation
(B) Rainfall
(C) Earthquakes
(D) Water pollution
29. Which pollutant is mainly responsible for smog?
(A) Hydrogen
(B) Oxygen
(C) Nitrogen oxides and particulate matter
(D) Helium
30. The ozone layer protects humans from:
(A) Infrared radiation
(B) Ultraviolet (UV) radiation
(C) Sound waves
(D) Radio waves
31. Deforestation contributes to:
(A) Reduced soil erosion
(B) Better air quality
(C) Increased biodiversity
(D) Climate change
32. Which gas is commonly known as a poisonous gas from incomplete combustion?
(A) Nitrogen
(B) Oxygen
(C) Carbon monoxide
(D) Hydrogen
33. Which environmental factor is essential for healthy housing?
(A) Damp rooms
(B) No windows
(C) Proper ventilation
(D) Poor lighting
34. Overcrowding in houses increases the risk of:
(A) Higher income
(B) Better health
(C) Communicable diseases
(D) Better ventilation
35. Which is a renewable source of energy?
(A) Petroleum
(B) Coal
(C) Solar energy
(D) Natural gas
36. Which disease is commonly linked with poor sanitation?
(A) Migraine
(B) Asthma
(C) Cancer
(D) Diarrhea
37. The main purpose of food hygiene is to:
(A) Increase food prices
(B) Improve food color only
(C) Prevent foodborne diseases
(D) Reduce food quantity
38. Which microorganism commonly causes food poisoning?
(A) Yeast only
(B) Lactobacillus
(C) Salmonella
(D) Algae
39. Environmental health is a branch of:
(A) Astronomy
(B) Public Health
(C) Economics
(D) Architecture
40. Which of the following is a biological pollutant?
(A) Lead
(B) Carbon dioxide
(C) Dust
(D) Bacteria
41. Lead exposure mainly affects the:
(A) Hair only
(B) Nervous system
(C) Nails only
(D) Teeth only
42. Which international day promotes environmental awareness?
(A) World Environment Day (June 5)
(B) World Health Day (April 7)
(C) World AIDS Day (December 1)
(D) International Nurses Day (May 12)
43. Composting is used for:
(A) Plastic recycling
(B) Organic waste management
(C) Glass production
(D) Metal extraction
44. Which environmental issue results from excessive nutrient runoff into water bodies?
(A) Earthquake
(B) Desertification
(C) Eutrophication
(D) Volcanic eruption
45. Which gas is mainly responsible for ozone layer depletion?
(A) Chlorofluorocarbons (CFCs)
(B) Oxygen
(C) Nitrogen
(D) Hydrogen
46. The best way to control mosquito breeding is to:
(A) Eliminate stagnant water
(B) Increase garbage piles
(C) Store water uncovered
(D) Keep drains blocked
47. Which environmental hazard is associated with excessive heat exposure?
(A) Ear infection
(B) Cataract
(C) Tooth decay
(D) Heat stroke
48. Which environmental factor is measured in decibels (dB)?
(A) Water quality
(B) Noise
(C) Air pressure
(D) Humidity
49. Environmental Impact Assessment (EIA) is conducted before:
(A) Vaccination campaigns
(B) School examinations
(C) Hospital admissions
(D) Major development projects
50. The ultimate aim of environmental health is to:
(A) Create a safe and healthy environment for all
(B) Increase industrial waste
(C) Promote pollution
(D) Encourage deforestation