Nokea
What types of challenges impact the availability of a safe water supply?
- A. Pollution, aging infrastructure, climate change.
- B. Excessive rainfall, low temperatures.
- C. Unlimited freshwater sources, advanced filtration.
- D. High public investment, minimal regulation.
Correct Answer: A
Rationale: Challenges include pollution, deteriorating infrastructure, and climate change affecting water resources.
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Confidence limit can be calculated by using
- A. Mean and range
- B. Mean standard deviation
- C. Median and range deviation
- D. Median and standard
Correct Answer: B
Rationale: Confidence limits are calculated using the mean and standard deviation.
The impact of an exposure on a population does not depend upon:
- A. the strength of the association between exposure and disease.
- B. the prevalence of the exposure.
- C. the case fatality rate.
- D. the overall incidence rate of disease in the population.
Correct Answer: C
Rationale: The case fatality rate refers to the proportion of individuals with a disease who die from it. While important, it does not directly determine the impact of an exposure on a population. The impact depends more on prevalence, incidence, and strength of association.
The "Gauli Bridge disaster" is related to
- A. RTA
- B. Silicosis
- C. Nuclear Accident
- D. Asbestosis
Correct Answer: A
Rationale: The Gauli Bridge disaster refers to a road traffic accident (RTA) that occurred in Nepal.
The measure of spread most affected by one extreme value is the:
- A. Interquartile range
- B. Range
- C. Standard deviation
- D. Mean
Correct Answer: B
Rationale: The range depends only on the largest and smallest values, making it sensitive to outliers.
The main of antituberculosis is
- A. bacteriological care
- B. radiological care
- C. prevent complication
- D. contact tracing
Correct Answer: A
Rationale: Bacteriological care is the cornerstone of tuberculosis control as it confirms diagnosis and monitors treatment effectiveness.