Correct Answer: B

Rationale: Thiazide diuretics are known to cause hypokalemia by increasing potassium excretion in the urine. Therefore, the nurse should monitor the client for low potassium levels. Hyperkalemia (Choice A) is not typically associated with thiazide diuretics. Hyponatremia (Choice C) is more commonly linked with thiazide diuretics due to increased sodium excretion. Hypoglycemia (Choice D) is not a usual concern when a client is receiving thiazide diuretics.

Correct Answer: A

Rationale: A potassium level of 3.0 mEq/L indicates hypokalemia, which increases the risk of digoxin toxicity. In this case, the nurse should administer the digoxin without any modifications. Lowering the dose (Choice B) may not be necessary if the potassium level is not critically low. Monitoring serum potassium levels (Choice C) is important but should not delay the administration of digoxin. Discontinuing the medication (Choice D) is not the initial action to take unless the potassium levels become severely low and life-threatening.

Correct Answer: C

Rationale: In a fire emergency, the priority for the nurse is to ensure safety. The correct first action is to evacuate the room, following the RACE protocol, which stands for Rescue, Alarm, Contain, and Extinguish/Evacuate. Activating the fire alarm alerts others, extinguishing the fire can escalate the situation if not done correctly, and calling the client's family is not a priority in this emergency scenario.

Correct Answer: B

Rationale: The correct answer is B: 'Dizziness.' Amlodipine, a calcium channel blocker used for hypertension, can cause dizziness due to its blood pressure-lowering effects. It is crucial for clients to report dizziness to their healthcare provider as it may indicate hypotension. Dry cough (choice A) is more commonly associated with ACE inhibitors, rash (choice C) may be seen in allergic reactions, and headache (choice D) is a less common side effect of amlodipine.

Correct Answer: B

Rationale: In situations where the type of hazard is unknown, the healthcare provider should choose the highest level of protection equipment available. This helps ensure adequate protection against any potential hazards that may be present. Using only basic gloves and a mask (Choice A) may not provide sufficient protection if the hazard is more severe. Opting for respiratory protection only (Choice C) may leave other areas of the body vulnerable to exposure. While asking a colleague for advice (Choice D) is good practice in general, in urgent situations like mass-casualty incidents with unknown hazards, it is crucial to prioritize immediate protection by selecting the highest level of PPE.