ATI TEAS 7
Metric Conversions for Nursing
1. What is 0.075 mg in mcg?
- A. 0.075 mcg
- B. 7.5 mcg
- C. 0.75 mcg
- D. 750 mcg
Correct answer: D
Rationale: To convert milligrams to micrograms, you need to multiply by 1000 since 1 mg = 1000 mcg. Therefore, 0.075 mg equals 75 * 1000 = 750 mcg. The correct answer is 750 mcg. Choices A, B, and C are incorrect because they do not apply the correct conversion factor of 1000. It is essential to understand these conversions, especially in medical settings where accurate dosing is crucial to avoid errors and ensure patient safety.
2. What does 'mg' stand for in the metric system?
- A. microgram
- B. milligram
- C. gigabyte
- D. megagram
Correct answer: B
Rationale: 'mg' stands for milligram, which is equal to 1/1,000th of a gram. In the metric system, 'microgram' (choice A) is represented by 'mcg', 'gigabyte' (choice C) is a unit of digital information storage, and 'megagram' (choice D) is equivalent to a metric ton.
3. How many pints are in one quart?
- A. 1 pint
- B. 2 pints
- C. 3 pints
- D. 4 pints
Correct answer: B
Rationale: The correct answer is B: 2 pints. There are 2 pints in one quart. A quart is equivalent to 2 pints, so each quart contains 2 pints. Choice A, 1 pint, is incorrect because a quart consists of more than 1 pint. Choice C, 3 pints, and Choice D, 4 pints, are also incorrect as they do not accurately represent the conversion of quarts to pints.
4. How many micrograms (mcg) are equivalent to 0.5 milligrams (mg)?
- A. 500 mcg
- B. 50 mcg
- C. 5 mcg
- D. 0.5 mcg
Correct answer: A
Rationale: To convert milligrams to micrograms, you need to multiply by 1000 because there are 1000 micrograms in 1 milligram. Therefore, 0.5 mg x 1000 = 500 mcg. This conversion is crucial in medication dosage calculations to ensure precise administration. Choice B, 50 mcg, is incorrect as it represents 0.05 mg. Choice C, 5 mcg, is incorrect as it corresponds to 0.005 mg. Choice D, 0.5 mcg, is incorrect because it is the same value as the initial amount in milligrams, rather than the converted value to micrograms.
5. Convert 3.75 liters to milliliters.
- A. 3.75 ml
- B. 375 ml
- C. 3750 ml
- D. 37.5 ml
Correct answer: C
Rationale: To convert liters to milliliters, you need to multiply by 1000 since there are 1000 milliliters in 1 liter. Therefore, 3.75 liters x 1000 = 3750 milliliters. This means that option C, 3750 ml, is the correct conversion. Choices A, B, and D are incorrect because they do not reflect the correct conversion from liters to milliliters.
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