Correct Answer: B

Rationale: The correct answer is the use of careful handwashing technique. Proper handwashing is the most effective way to prevent the transmission of infectious organisms. Option A, administration of plasma expanders, addresses hypovolemia in burn patients but does not directly decrease the risk of infection. Option C, application of a topical antibacterial cream, is beneficial but not as effective as proper handwashing in preventing infection. Option D, limiting visitors, may help reduce the risk of exposure to pathogens but is not as critical as ensuring healthcare providers maintain strict hand hygiene, which is the cornerstone of infection control in any healthcare setting.

Correct Answer: B

Rationale: During the evacuation of a unit due to a fire, ambulatory clients should be evacuated via the stairway if possible and reminded to walk carefully to ensure their safety. They do not necessarily require assistance via a wheelchair. Elevators should not be used during a fire evacuation as they can pose a risk, and fire doors should be kept closed to contain the fire and smoke, preventing its spread to other areas of the building. Therefore, reminding the client to walk carefully down the stairs is the most appropriate action in this situation. Assigning an unlicensed assistive person to transport the client via a wheelchair may delay the evacuation process and put both individuals at risk. Asking the client to help by assisting a wheelchair-bound client to an elevator is not safe during a fire evacuation. Opening fire doors indiscriminately can lead to the spread of fire and smoke, endangering the clients and staff further.

Correct Answer: C

Rationale: Water should be instilled into the feeding tube between administering the two medications to maintain the patency of the feeding tube and ensure that the total dose of medication enters the stomach and does not remain in the tube. These liquid medications do not need to be diluted when administered via a feeding tube. Mixing the medications in one syringe can lead to interactions or alterations in the medications' properties. Withdrawing any fluid from the tube before instilling each medication can cause inaccurate dosing and incomplete administration. Therefore, the correct action is to administer water between the doses of the two liquid medications to ensure proper delivery and avoid any complications.

Correct Answer: A

Rationale: When the nurse rolls contaminated gloves inside-out, they are manipulating the mode of transmission in the chain of infection. The gloves, which are contaminated, act as a vehicle for transferring pathogens from the reservoir's portal of exit to a potential portal of entry. Choices B, C, and D are incorrect because the action of rolling contaminated gloves does not directly relate to the portal of entry, reservoir, or portal of exit in the chain of infection.

Correct Answer: A

Rationale: The most critical nursing action when assisting an older adult client in preparing for a tub bath is to check the bath water temperature. This step is essential to prevent burns or excessive chilling, prioritizing the client's safety. While ensuring privacy by shutting the bathroom door (option B), confirming that the client has voided (option C), and providing extra towels (option D) are all important for comfort and dignity, they are secondary to ensuring the client's safety during bathing. Therefore, checking the bath water temperature is the priority to safeguard the client's well-being and prevent potential injuries.