Comprehensive Oxygen and Medical Gas Therapy, Respiratory Care Exam Review questions and correct answers year 2025/2026. PRETEST QUESTIONS Answer the pretest questions before studying the chapter. This will help you determine your strong and weak areas in the material covered. 1. The respiratory therapist is performing bag-mask ventilation on a severe COPD patient during CPR. Which of the following describes the best method for ventilating this patient? A. The bag should be connected to an air wall outlet. B. The flow to the bag should be 10 L/min with no reservoir attachment. C. The bag should be connected to an O2 blender set at 30%. D. The bag should have a reservoir attachment and a flow of 15 L/min. 2. While manually ventilating an intubated apneic patient with a manual resuscitator, there is very little resistance when the bag is compressed, and the patients chest rises only minimally. Which of the following may be the cause of this problem? A. Excessive endotracheal (ET) tube cuff pressure. B. Exhalation valve jammed in the closed position. C. The patients lungs are noncompliant. D. Inadequate ET tube cuff pressure. 3. A patient has been intubated, and CPR is being performed. The patients ECG