Correct Answer: B

Rationale: The most effective way for the nurse to assess the parents' understanding of the dressing change procedure is by observing them as they change the dressing using the correct technique. This direct observation ensures that the parents are able to perform the task correctly and confidently before discharge. Merely verbalizing or explaining the procedure may not accurately reflect the parents' competency in performing the actual task. Choice A involves the parents explaining to the nurse, which does not directly assess their practical skills. Choice C suggests the parents observing the nurse, which does not evaluate the parents' ability to perform the task independently. Choice D focuses on boosting the parents' confidence but does not directly assess their understanding and competency in performing the dressing change.

Correct Answer: C

Rationale: Typhoid fever is primarily spread through contaminated food and water, usually due to poor sanitation practices. The bacteria responsible for typhoid fever, Salmonella Typhi, is typically found in food or water contaminated by the feces of an infected person. Contaminated air is not a significant mode of transmission for typhoid fever, making choice A incorrect. While waterborne transmission can occur, it is through contaminated water rather than specifically mineral water, making choice B incorrect. Therefore, the correct answer is C, as contaminated food and water are the main sources of transmission for typhoid fever.

Correct Answer: B

Rationale: In situations where a sibling is upset about a family member being hospitalized, suggesting that the sister come to the hospital for a visit can help alleviate her concerns. This allows the sister to see her brother, ask questions, and receive reassurance from seeing him in stable condition. Direct contact and interaction can often provide more comfort and understanding than phone calls or staying at home. Encouraging phone calls (Choice A) might not provide the same level of comfort as a physical visit. While spending extra time with the daughter at home (Choice C) is important, in this scenario, facilitating a visit to the hospital can address the daughter's immediate concerns better. Reminding the parents that it is normal for children to be upset (Choice D) is not as proactive as arranging for the sister to visit her brother.

Correct Answer: A

Rationale: Weighing the diapers is the most appropriate method to assess urine output in infants. Diapers will absorb and retain urine, providing a measurable indicator of urine output without invasive procedures. This method is non-invasive, simple, and convenient for monitoring urine output, especially in infants who may not be able to use other urine output measurement techniques. Inserting a Foley catheter is invasive and not indicated for routine urine output monitoring in infants. Comparing intake with output does not directly measure urine output. Measuring the amount of water added to formula does not provide an accurate assessment of urine output.

Correct Answer: B

Rationale: In pediatric clinical assessment, a child at two years of age with fast breathing but without chest indrawing or stridor when calm is classified as having pneumonia. Fast breathing in this context is a key symptom used in the Integrated Management of Childhood Illness (IMCI) guidelines to diagnose pneumonia in children under five years old. The absence of chest indrawing or stridor when the child is calm helps differentiate this case from other respiratory conditions, making pneumonia the likely classification. Choices A, C, and D are incorrect. 'Very severe disease' is too broad and not specific to the symptoms described. 'No pneumonia' is also incorrect as the symptoms match the presentation of pneumonia. 'Local infection' is too vague and does not specifically address the respiratory symptoms observed.