All Free Community Health Nursing MCQs with Answers

• A. It stores drinking water for later household use
• B. It settles solids and partly decomposes sewage
• C. It disinfects sewage completely before discharge
• D. It removes all chemical pollutants from sewage

Explanation: A septic tank allows solids to settle and undergo anaerobic decomposition before the liquid effluent leaves the tank.

• A. Direct the wastewater onto the nearest road
• B. Construct a properly designed soakage pit
• C. Store the wastewater in an open bucket
• D. Mix the wastewater with household drinking water

Explanation: A soakage pit allows suitable household wastewater to infiltrate into the soil while reducing stagnant surface water.

• A. Noise from traffic near a school
• B. Drinking water contaminated with human feces
• C. Poor lighting inside a crowded house
• D. Exposure to cotton dust at work

Explanation: Cholera spreads mainly through ingestion of water or food contaminated with feces containing Vibrio cholerae.

• A. Open one window after smoking
• B. Smoke only in a separate outdoor area
• C. Use an air freshener in the room
• D. Allow smoking near the kitchen exhaust fan

Explanation: A completely smoke-free home is the most effective household protection for children.

• A. Wet-mop dust and remove the lead paint hazard safely
• B. Dry-sweep the walls every morning
• C. Give iron tablets without assessing the home
• D. Paint over the peeling surface without preparation

Explanation: Older peeling paint may contain lead, and wet cleaning helps prevent contaminated dust from becoming airborne.

• A. Provide perfume to mask the chemical smell
• B. Improve local exhaust ventilation and keep containers closed
• C. Ask the worker to hold the container farther away
• D. Replace protective gloves with cotton gloves

Explanation: Local exhaust ventilation and closed containers reduce exposure at the source, which is higher in the control hierarchy than relying only…

• A. Flush them down the household toilet
• B. Burn them with ordinary kitchen refuse
• C. Return them to an authorised medicine collection point
• D. Leave them uncovered beside the community refuse bin

Explanation: Expired medicines should be returned to an authorised collection or health facility disposal system so they can be handled as…

• A. It removes oils and fats before wastewater enters drains
• B. It sterilises sewage before it reaches a drain
• C. It converts drinking water into wastewater
• D. It increases the flow of solid refuse through pipes

Explanation: A grease trap collects fats, oils and grease before they enter drainage pipes, helping prevent blockage and foul odours.

• A. Wash the cut once and leave it uncovered
• B. Cover it with a waterproof dressing and wear a glove
• C. Dip the finger in disinfectant before each task
• D. Continue working if the cut is not painful

Explanation: A waterproof dressing followed by a clean glove helps prevent organisms from the wound entering food.

• A. Provide sweetened drinks during the shift
• B. Install local exhaust ventilation near dusty machinery
• C. Ask workers to work faster to shorten exposure
• D. Place a fan behind each worker to blow dust away

Explanation: Local exhaust ventilation captures cotton dust near the machinery before it spreads through the workplace.

• A. Point prevalence
• B. Incidence
• C. Case-fatality rate
• D. Proportional mortality

Explanation: Incidence measures new cases that develop in a population at risk during a defined time.

• A. Point prevalence
• B. Cumulative incidence
• C. Attack rate
• D. Case-fatality rate

Explanation: Point prevalence is the proportion of a population with a condition at one specific point in time.

• A. Crude mortality rate
• B. Incidence rate
• C. Case-fatality rate
• D. Proportional morbidity rate

Explanation: The case-fatality rate is the percentage of diagnosed patients who die from the disease.

• A. Convenience sampling
• B. Systematic sampling
• C. Purposive sampling
• D. Cluster sampling

Explanation: Systematic sampling selects units at a fixed interval after a random start.

• A. 110 mmHg
• B. 120 mmHg
• C. 130 mmHg
• D. 150 mmHg

Explanation: The median is the middle value when observations are arranged in order. The third value in this ordered set is 120 mmHg.

• A. Mean
• B. Median
• C. Arithmetic average
• D. Weighted mean

Explanation: The median is based on the middle position and is less influenced by extreme observations.

• A. The study has a large sample size
• B. The association remains after controlling for age and household crowding
• C. The participants come from one hospital
• D. The infection diagnosis is based on symptoms alone

Explanation: Controlling for potential confounding variables, such as age and household crowding, helps determine whether the observed association…

• A. High sensitivity
• B. High specificity
• C. High positive predictive value
• D. Low negative predictive value

Explanation: High sensitivity detects a large proportion of people who truly have the disease and produces few false-negative results.

• A. To describe disease distribution by person, place and time
• B. To prove that one treatment caused recovery
• C. To calculate the average height of the population
• D. To replace laboratory confirmation of every case

Explanation: Describing cases by person, place and time helps identify patterns, clusters and possible sources of infection.

• A. Umbrella use causes wet clothing
• B. Wet clothing prevents umbrella use
• C. The finding shows an association, not necessarily causation
• D. The finding proves that rain has no effect

Explanation: The two factors are associated because both may be related to rainfall, which is a possible confounding factor.