CALIFORNIA RESPIRATORY CARE
PRACTITIONER (RCP) EXAMINATION:
COMPLETE PRACTICE EXAM WITH ANSWERS
AND RATIONALES (QUESTIONS 1-100)
1. Which component of patient assessment involves listening to breath sounds and detecting abnormal
sounds such as crackles or wheezes?
A) Inspection
B) Palpation
C) Auscultation
D) Percussion
Answer: C
Rationale: Auscultation involves listening to the chest with a stethoscope to assess breath sounds and
identify abnormalities like crackles, wheezes, or absence of sounds .
2. In interpreting arterial blood gas (ABG) results, a pH of 7.25 with a PaCO2 of 50 mm Hg and HCO3- of
24 mEq/L indicates which acid-base disorder?
A) Respiratory acidosis
B) Metabolic acidosis
C) Respiratory alkalosis
D) Metabolic alkalosis
Answer: A
Rationale: A low pH (below 7.35) with elevated PaCO2 (above 45 mm Hg) indicates respiratory acidosis,
as CO2 retention causes acid buildup .
3. Which spirometry measurement reflects the maximum amount of air forcibly exhaled after a full
inspiration?
A) FEV1
B) FVC
,C) PEFR
D) TLC
Answer: B
Rationale: Forced Vital Capacity (FVC) measures the total volume of air exhaled forcefully after maximal
inhalation .
4. What is the normal range for arterial PaO2 in adults at sea level?
A) 80–100 mm Hg
B) 60–80 mm Hg
C) 100–120 mm Hg
D) 40–60 mm Hg
Answer: A
Rationale: Normal oxygen partial pressure in arterial blood is 80–100 mm Hg at sea level .
5. Which condition is characterized by alveolar collapse?
A) Atelectasis
B) Pneumothorax
C) Pulmonary embolism
D) Emphysema
Answer: A
Rationale: Atelectasis occurs when alveoli deflate, reducing gas exchange and leading to impaired
oxygenation .
6. What is the normal respiratory rate for an adult?
A) 8–12 breaths/min
B) 12–20 breaths/min
C) 20–28 breaths/min
D) 28–36 breaths/min
Answer: B
,Rationale: The normal resting respiratory rate for a healthy adult is 12 to 20 breaths per minute. Below
12 is bradypnea; above 20 is tachypnea .
7. Which ECG rhythm is characterized by irregularly irregular atrial activity with no identifiable P waves?
A) Normal sinus rhythm
B) Atrial fibrillation
C) Ventricular tachycardia
D) Sinus bradycardia
Answer: B
Rationale: Atrial fibrillation presents with an irregularly irregular rhythm and absence of distinct P
waves, resulting from chaotic atrial electrical activity .
8. Which laboratory value indicates an increased risk of bleeding and needs to be monitored before
invasive procedures?
A) Hemoglobin
B) Platelet count
C) INR (International Normalized Ratio)
D) White blood cell count
Answer: C
Rationale: INR reflects blood clotting ability; an elevated INR indicates increased bleeding risk and must
be monitored before invasive procedures .
9. Capnography primarily measures which parameter?
A) SpO2
B) End-tidal CO2 (EtCO2)
C) PaO2
D) Hemoglobin saturation
Answer: B
Rationale: Capnography measures end-tidal CO2 (EtCO2), reflecting ventilation status and CO2
elimination. It does not measure oxygenation .
, 10. Which arterial blood gas value indicates respiratory acidosis?
A) pH < 7.35 and PaCO2 > 45 mm Hg
B) pH > 7.45 and PaCO2 < 35 mm Hg
C) pH < 7.35 and HCO3- < 22 mEq/L
D) pH > 7.45 and HCO3- > 26 mEq/L
Answer: A
Rationale: Low pH with elevated PaCO2 indicates hypoventilation causing respiratory acidosis .
11. Which lung volume is tidal volume plus inspiratory reserve volume?
A) Inspiratory capacity
B) Functional residual capacity
C) Vital capacity
D) Total lung capacity
Answer: A
Rationale: Inspiratory capacity represents the maximum amount of air inspired after normal expiration
(tidal volume plus inspiratory reserve volume) .
12. Which ABG represents metabolic acidosis?
A) pH < 7.35 and HCO3- < 22 mEq/L
B) pH > 7.45 and HCO3- > 26 mEq/L
C) pH < 7.35 and PaCO2 > 45 mm Hg
D) pH > 7.45 and PaCO2 < 35 mm Hg
Answer: A
Rationale: Low pH with low bicarbonate indicates metabolic acidosis, typically resulting from increased
acid production or bicarbonate loss .
13. Which ABG indicates partially compensated respiratory acidosis?
A) Low pH, high PaCO2, elevated HCO3-
PRACTITIONER (RCP) EXAMINATION:
COMPLETE PRACTICE EXAM WITH ANSWERS
AND RATIONALES (QUESTIONS 1-100)
1. Which component of patient assessment involves listening to breath sounds and detecting abnormal
sounds such as crackles or wheezes?
A) Inspection
B) Palpation
C) Auscultation
D) Percussion
Answer: C
Rationale: Auscultation involves listening to the chest with a stethoscope to assess breath sounds and
identify abnormalities like crackles, wheezes, or absence of sounds .
2. In interpreting arterial blood gas (ABG) results, a pH of 7.25 with a PaCO2 of 50 mm Hg and HCO3- of
24 mEq/L indicates which acid-base disorder?
A) Respiratory acidosis
B) Metabolic acidosis
C) Respiratory alkalosis
D) Metabolic alkalosis
Answer: A
Rationale: A low pH (below 7.35) with elevated PaCO2 (above 45 mm Hg) indicates respiratory acidosis,
as CO2 retention causes acid buildup .
3. Which spirometry measurement reflects the maximum amount of air forcibly exhaled after a full
inspiration?
A) FEV1
B) FVC
,C) PEFR
D) TLC
Answer: B
Rationale: Forced Vital Capacity (FVC) measures the total volume of air exhaled forcefully after maximal
inhalation .
4. What is the normal range for arterial PaO2 in adults at sea level?
A) 80–100 mm Hg
B) 60–80 mm Hg
C) 100–120 mm Hg
D) 40–60 mm Hg
Answer: A
Rationale: Normal oxygen partial pressure in arterial blood is 80–100 mm Hg at sea level .
5. Which condition is characterized by alveolar collapse?
A) Atelectasis
B) Pneumothorax
C) Pulmonary embolism
D) Emphysema
Answer: A
Rationale: Atelectasis occurs when alveoli deflate, reducing gas exchange and leading to impaired
oxygenation .
6. What is the normal respiratory rate for an adult?
A) 8–12 breaths/min
B) 12–20 breaths/min
C) 20–28 breaths/min
D) 28–36 breaths/min
Answer: B
,Rationale: The normal resting respiratory rate for a healthy adult is 12 to 20 breaths per minute. Below
12 is bradypnea; above 20 is tachypnea .
7. Which ECG rhythm is characterized by irregularly irregular atrial activity with no identifiable P waves?
A) Normal sinus rhythm
B) Atrial fibrillation
C) Ventricular tachycardia
D) Sinus bradycardia
Answer: B
Rationale: Atrial fibrillation presents with an irregularly irregular rhythm and absence of distinct P
waves, resulting from chaotic atrial electrical activity .
8. Which laboratory value indicates an increased risk of bleeding and needs to be monitored before
invasive procedures?
A) Hemoglobin
B) Platelet count
C) INR (International Normalized Ratio)
D) White blood cell count
Answer: C
Rationale: INR reflects blood clotting ability; an elevated INR indicates increased bleeding risk and must
be monitored before invasive procedures .
9. Capnography primarily measures which parameter?
A) SpO2
B) End-tidal CO2 (EtCO2)
C) PaO2
D) Hemoglobin saturation
Answer: B
Rationale: Capnography measures end-tidal CO2 (EtCO2), reflecting ventilation status and CO2
elimination. It does not measure oxygenation .
, 10. Which arterial blood gas value indicates respiratory acidosis?
A) pH < 7.35 and PaCO2 > 45 mm Hg
B) pH > 7.45 and PaCO2 < 35 mm Hg
C) pH < 7.35 and HCO3- < 22 mEq/L
D) pH > 7.45 and HCO3- > 26 mEq/L
Answer: A
Rationale: Low pH with elevated PaCO2 indicates hypoventilation causing respiratory acidosis .
11. Which lung volume is tidal volume plus inspiratory reserve volume?
A) Inspiratory capacity
B) Functional residual capacity
C) Vital capacity
D) Total lung capacity
Answer: A
Rationale: Inspiratory capacity represents the maximum amount of air inspired after normal expiration
(tidal volume plus inspiratory reserve volume) .
12. Which ABG represents metabolic acidosis?
A) pH < 7.35 and HCO3- < 22 mEq/L
B) pH > 7.45 and HCO3- > 26 mEq/L
C) pH < 7.35 and PaCO2 > 45 mm Hg
D) pH > 7.45 and PaCO2 < 35 mm Hg
Answer: A
Rationale: Low pH with low bicarbonate indicates metabolic acidosis, typically resulting from increased
acid production or bicarbonate loss .
13. Which ABG indicates partially compensated respiratory acidosis?
A) Low pH, high PaCO2, elevated HCO3-
