Correct Answer: A

Rationale: To test visual acuity with the use of a Snellen chart, the nurse places the chart in a well-lit spot at the client's eye level, with the client positioned exactly 20 feet from the chart. The client shields one eye at a time with an opaque card during the test. After testing each eye separately, both eyes are assessed together. The client is asked to read the smallest line of letters visible and encouraged to read the next smallest line as well. Therefore, option A is correct as it describes the correct technique of testing one eye at a time before assessing both eyes together. Option B is incorrect as it assesses both eyes together first, which is not the standard procedure. Options C and D are incorrect as they suggest standing 40 feet from the chart, which contradicts the standard distance of 20 feet for a Snellen chart test.

Correct Answer: B

Rationale: The correct answer is Osteoarthritis. Osteoarthritis is characterized by hard, nontender nodules of 2 to 3 mm or larger. These osteophytes (bony overgrowths) of the distal interphalangeal joints are called Heberden nodes. In this disorder, when these nodes occur on the proximal interphalangeal joints, they are called Bouchard nodes. Heberden nodes are not associated with scoliosis, rotator cuff lesions, or carpal tunnel syndrome. Therefore, choices A, C, and D are incorrect.

Correct Answer: B

Rationale: To calculate the correct dosage, first convert the client's weight from pounds to kilograms. As 1 kg = 2.2 pounds, 176 pounds ÷ 2.2 = 80 kg. The client should receive 0.2 units for every kilogram, which equals 16 units. Therefore, the total amount to prepare is 16 units x 100 units/mL = 1600 units. Considering the medication concentration of 100 units/mL, 1600 units ÷ 100 units/mL = 16 mL. However, since the question asks for the number of units, the final answer is 16 units x 2 injections = 32 units. Therefore, the LPN should prepare 32 units for administration.

Correct Answer: A

Rationale: The correct answer is 'Immunizations may be started at any age.' While there is a recommended immunization schedule, immunizations can be initiated at any age. It is essential to emphasize the flexibility in starting immunizations. The statement 'The recommended immunization schedule should be followed' is too rigid; while recommended, there is flexibility in initiation. Choice C is correct as an interrupted series can be continued without restarting. The statement 'Delaying the start of vaccines does not increase the risk of reaction' is correct. Delaying does not increase the risk of reaction; in fact, it is important to start immunizations to protect the child and the community.

Correct Answer: C

Rationale: The correct answer is 'certain diet and foods.' Risk factors that increase the chances of getting skin cancer include having a light or fair complexion, a history of bad sunburns, personal or family history of skin cancer, outdoor activities with sun exposure, exposure to X-rays or radiation, exposure to certain chemicals, repeated trauma or injury resulting in scars, age over 50, male gender, and living in specific geographic locations. These factors can contribute to the development of skin cancer. Avoiding exposure to the sun, using protective clothing and sunscreen, and regular skin inspections are key preventive measures. Choice C, 'certain diet and foods,' is incorrect as diet is not a primary risk factor for skin cancer. Options A, B, and D are all valid risk factors associated with an increased risk of developing skin cancer.