When setting up a dimensional analysis equation, why is it important to align units diagonally?
To increase the speed of calculation
To cancel out units and simplify the calculation
To ensure the equation is balanced
To make the equation Easier to read
The Correct Answer is B
Rationale:
A. To increase the speed of calculation: Aligning units diagonally does not inherently speed up the calculation; the main purpose is to ensure proper unit conversion and accuracy.
B. To cancel out units and simplify the calculation: Aligning units diagonally allows units that appear in both the numerator and denominator to cancel out correctly. This ensures the final answer is in the desired unit and reduces the risk of dosing errors.
C. To ensure the equation is balanced: While correct unit alignment contributes to a mathematically correct setup, “balancing” is not the primary reason; the focus is on unit cancellation.
D. To make the equation easier to read: Although diagonal alignment can improve readability, the critical purpose is accurate conversion and calculation through proper cancellation of units.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Calculation:
Ordered Dose = 1/2 cup
Conversion: 1 cup = 240 mL
Volume in mL = Number of cups × 240 mL
= 1/2 × 240
= 120 mL
Correct Answer is B
Explanation
Rationale:
A. It lists contraindications for use: Contraindications are typically listed separately in prescribing information or patient leaflets, not in the brand name itself.
B. It distinguishes the commercial product from other brands: The brand name identifies the specific marketed version of a medication, making it easier for patients and providers to recognize the product and differentiate it from other brands or generic equivalents.
C. It provides detailed pharmacokinetic data: Pharmacokinetic information, such as absorption and metabolism, is not included in the brand name; this data is found in reference materials or drug monographs.
D. It shows the drug's chemical structure: The chemical structure is part of the scientific description of the drug, not indicated by the brand name on the label.
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