Nokea
Describe the 1986 incident in Chernobyl.
- A. A nuclear reactor explosion released radioactive materials.
- B. A controlled experiment involving radiation exposure.
- C. A routine maintenance operation at a power plant.
- D. A natural disaster caused by seismic activity.
Correct Answer: A
Rationale: The Chernobyl disaster involved a nuclear reactor explosion that dispersed radioactive materials across Europe.
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John Snow located source of
- A. cholera
- B. typhoid
- C. plague
- D. All
Correct Answer: A
Rationale: John Snow is famous for identifying the source of a cholera outbreak in London.
Aflatoxin causes,
- A. neurolathyrism
- B. hepatoma
- C. cholengio carcinoma
- D. botulism
Correct Answer: B
Rationale: Aflatoxins are carcinogenic compounds that primarily cause liver cancer (hepatoma).
A case definition during an outbreak investigation should specify:
- A. Clinical features
- B. Time
- C. Place
- D. Person
Correct Answer: A
Rationale: A good case definition includes clinical criteria and details on time, place, and person to ensure consistent identification of cases.
Is public health surveillance only conducted by public health agencies?
- A. True.
- B. FALSE
Correct Answer: B
Rationale: Public health surveillance is not only conducted by public health agencies. Other entities such as hospitals and private institutions also contribute to surveillance efforts.
Which of the following is unrelated to the chi square test of significance?
- A. Degree of freedom
- B. Life table
- C. Significance level
- D. Qualitative data
Correct Answer: B
Rationale: Life tables are not directly related to chi-square tests, which assess qualitative data associations.