CHAPTER 5: DOSAGE CALCULATIONS QUESTIONS WITH COMPLETE SOLUTIONS

CHAPTER 5: DOSAGE CALCULATIONS QUESTIONS WITH
COMPLETE SOLUTIONS



True or False: One tablespoon is equivalent to 30 milliliters. - ANSWER-False


(Rationale: One tablespoon is equivalent to 15 milliliters.)


Six fluid ounces are equivalent to how many milliliters?
a. 120 mL
b. 180 mL
c. 240 mL
d. 60 mL - ANSWER-b. 180 mL


(Rationale: One fluid ounce is equivalent to 30 mL. Using this conversion, the
nurse would set up the following ratio and proportion: 1 f oz/30 mL = 6 f oz/X
mL. Cross multiplying and solving for X: X = 180 mL.)


A patient is to receive 150 mL of intravenous solution over the next hour using a
microdrip delivery system. How much fluid would the patient receive in 1
minute?
a. 2.5 mL
b. 1.5 mL
c. 4.5 mL

, d. 3.0 mL - ANSWER-a. 2.5 mL


(Rationale: The nurse would divide 150 mL by 60 minutes, which would result in
2.5 mL per minute.)


A child is to receive 500 mg of an antibiotic suspension. The label on the bottle
reads 250 mg/5 mL. The nurse would administer how much of the suspension in
one dose?
a. 2.5 mL
b. 7.5 mL
c. 5 mL
d. 10 mL - ANSWER-d. 10 mL


(Rationale: To determine the amount to give, the nurse would set up the
following ratio and proportion: 250 mg/5 mL = 500 mg/X mL. Cross multiplying
and solving for X: 250X = 5 x 500; X = 10 mL.)


A drug label reads "1 tablet equals 50 milligrams". How many grains would this
be?
a. 0.5 grain
b. 1.5 grains
c. 2 grains
d. 1 grain - ANSWER-d. 1 grain


(Rationale: Sixty milligrams is equivalent to 1 grain.)