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FREE ABG PRACTICE QUIZ

August 22, 2026 No Comments

Arterial Blood Gas (ABG) Interpretation Practice Questions

 

Arterial Blood Gas (ABG) Interpretation Quiz for Nursing Students

Decode the numbers. Guide the care.

This ABG Interpretation Quiz is designed to help nursing students confidently analyze arterial blood gas results and connect them to clinical decision-making. From pH and CO₂ to HCO₃⁻ and compensation, these NCLEX-style questions reinforce your ability to interpret values, identify acid-base imbalances, and respond appropriately in real-life scenarios.

This quiz is perfect for:

  • Practicing ABG analysis and interpretation
  • Reinforcing acid-base balance and compensation concepts
  • Preparing for NCLEX and nursing school exams
  • Building clinical confidence in respiratory and metabolic conditions

Master ABG interpretation and turn lab results into life-saving insight.

1 / 15

pH: 7.30, PCO2: 57, HCO3: 25

pH 45 (Acidotic), PCO2 57 (Acidotic), HCO3 22-26 (Normal)

pH 45 (Acidotic), PCO2 57 (Acidotic), HCO3 22-26 (Normal)

2 / 15

pH: 7.49, PCO2: 33, HCO3: 24

pH > 7.45 (Alkalotic), PCO2 < 35 (Alkalotic), HCO3 22-26 (Normal)

pH > 7.45 (Alkalotic), PCO2 < 35 (Alkalotic), HCO3 22-26 (Normal)

3 / 15

pH: 7.31, PCO2: 37, HCO3: 19

pH < 7.35, PCO2 35-45 (Normal), HCO3 < 22 (Acidotic)

pH < 7.35, PCO2 35-45 (Normal), HCO3 < 22 (Acidotic)

4 / 15

pH: 7.45, PCO2: 33, HCO3: 20

pH 7.35-7.45 (Normal, but high end of normal), PCO2 < 35 (Alkalotic), HCO3 < 22 (Acidotic

pH 7.35-7.45 (Normal, but high end of normal), PCO2 < 35 (Alkalotic), HCO3 < 22 (Acidotic

5 / 15

pH: 7.27, PCO2: 28, HCO3: 15

pH < 7.35 (Acidotic), PCO2 < 35 (Alkalotic), HCO3 < 22 (Acidotic)

pH < 7.35 (Acidotic), PCO2 < 35 (Alkalotic), HCO3 < 22 (Acidotic)

6 / 15

pH: 7.32, PCO2: 36, HCO3: 16

pH < 7.35, PCO2 35-45 (Normal), HCO3 < 22 (Acidotic)

pH < 7.35, PCO2 35-45 (Normal), HCO3 < 22 (Acidotic)

7 / 15

pH: 7.47, PCO2: 43, HCO3: 27

pH > 7.45 (Alkalotic), PCO2 35-45 (Normal), HCO3 > 26 (Alkalotic)

pH > 7.45 (Alkalotic), PCO2 35-45 (Normal), HCO3 > 26 (Alkalotic)

8 / 15

pH: 7.33, PCO2: 58, HCO3: 25

pH 45 (Acidotic), HCO3 22-26 (Normal)

pH 45 (Acidotic), HCO3 22-26 (Normal)

9 / 15

pH: 7.32, PCO2: 55, HCO3: 24

pH 45 (Acidotic), HCO3 22-26 (Normal)

pH 45 (Acidotic), HCO3 22-26 (Normal)

10 / 15

pH: 7.48, PCO2: 43, HCO3: 29

pH > 7.45 (Alkalotic), PCO2 35-45, HCO3 > 26 (Alkalotic)

pH > 7.45 (Alkalotic), PCO2 35-45, HCO3 > 26 (Alkalotic)

11 / 15

pH: 7.30, PCO2: 35, HCO3: 18

pH < 7.35 (Acidotic), CO2 35-45 (Normal), HCO3 < 22 (Acidotic)

pH < 7.35 (Acidotic), CO2 35-45 (Normal), HCO3 < 22 (Acidotic)

12 / 15

pH: 7.12, PCO2: 15, HCO3: 4

pH < 7.35 (Acidotic), CO2 < 35 (Alkalotic), HCO3 < 22 (Acidotic)

pH < 7.35 (Acidotic), CO2 < 35 (Alkalotic), HCO3 < 22 (Acidotic)

13 / 15

pH: 7.5, PCO2: 15, HCO3: 26

pH > 7.45 (Alkalotic), CO2 < 35 (Alkalotic), HCO3 26 (normal)

pH > 7.45 (Alkalotic), CO2 < 35 (Alkalotic), HCO3 26 (normal)

14 / 15

pH: 7.37, PCO2: 27, HCO3: 20

Notice how even though the pH is in normal range, it is on the acidotic side (< 7.4) meaning the likely disturbance was acidotic. Our CO2 of 27 is alkalotic, which doesn’t correspond with our pH, so we know this must be compensation. Our HCO3 of 20 is acidotic which tells us this was the primary condition because it explains our pH.

Notice how even though the pH is in normal range, it is on the acidotic side (< 7.4) meaning the likely disturbance was acidotic. Our CO2 of 27 is alkalotic, which doesn’t correspond with our pH, so we know this must be compensation. Our HCO3 of 20 is acidotic which tells us this was the primary condition because it explains our pH.

15 / 15

pH: 7.21, PCO2: 50, HCO3: 24

Your score is

The average score is 26%

0%

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