Mosby’s Chapter 4: Administering Medical
Gases (Regulators, Flowmeters, and
Controlling Devices) – Assessment Questions –
EXAM STUDY GUIDE 2026/2027 COMPLETE
QUESTIONS WITH VERIFIED CORRECT
ANSWERS || 100% GUARANTEED PASS
Describe an easy method of determining the number of stages in a multistage regulator -
ANSWER The easiest way to determine the number of stages in a regulator is to count the
number of pressure-relief valves. Each chamber should have its own pressure-relief valve.
Which of the following devices is/are considered fixed-performance oxygen delivery system(s)?
- ANSWER 1. Simple oxygen mask
2. Nasal Catheter
3. Air entrainment mask
4. Partial rebreathing mask
A. 1 and 2 only
B. 1, 2, and 3, only
C. 3 only
D. 1, 2, 3, and 4
C - 3 only
, Which of the following statements is true regarding back pressure-compensated flowmeters? -
ANSWER A. The needle is positioned before the indicator tube
B. High-resistance devices attached to these flowmeters cause erroneously high flow readings
C. Faulty valve seats do not affect flow readings
D. Gas flow from these flowmeters stops if resistance creates a back pressure that exceeds the
source gas pressure.
D - Gas flow from these flowmeters stops if resistance creates a back pressure that exceeds the
source gas pressure.
Which of the following are advantages of using transtracheal oxygen (TTO) Therapy catheters? -
ANSWER 1. They do not require periodic replacement
2. The incidence of infection is considerably lower than with other low-flow oxygen devices
3. They require lower oxygen flows to achieve a given FIO2 than do standard nasal cannulas
4. They are less obstructive (i.e., more cosmetically pleasing) than nasal cannulas
A. 1 and 3 only
B. 2 and 3 only
C. 3 and 4 only
D. 2, 3, and 4 only
C - 3 and 4 only
What is the air-to-oxygen entrainment ratio for delivering 40% oxygen through an air
entrainment mask? - ANSWER A. 2 : 1
B. 1 : 2
C. 1 : 3
Gases (Regulators, Flowmeters, and
Controlling Devices) – Assessment Questions –
EXAM STUDY GUIDE 2026/2027 COMPLETE
QUESTIONS WITH VERIFIED CORRECT
ANSWERS || 100% GUARANTEED PASS
Describe an easy method of determining the number of stages in a multistage regulator -
ANSWER The easiest way to determine the number of stages in a regulator is to count the
number of pressure-relief valves. Each chamber should have its own pressure-relief valve.
Which of the following devices is/are considered fixed-performance oxygen delivery system(s)?
- ANSWER 1. Simple oxygen mask
2. Nasal Catheter
3. Air entrainment mask
4. Partial rebreathing mask
A. 1 and 2 only
B. 1, 2, and 3, only
C. 3 only
D. 1, 2, 3, and 4
C - 3 only
, Which of the following statements is true regarding back pressure-compensated flowmeters? -
ANSWER A. The needle is positioned before the indicator tube
B. High-resistance devices attached to these flowmeters cause erroneously high flow readings
C. Faulty valve seats do not affect flow readings
D. Gas flow from these flowmeters stops if resistance creates a back pressure that exceeds the
source gas pressure.
D - Gas flow from these flowmeters stops if resistance creates a back pressure that exceeds the
source gas pressure.
Which of the following are advantages of using transtracheal oxygen (TTO) Therapy catheters? -
ANSWER 1. They do not require periodic replacement
2. The incidence of infection is considerably lower than with other low-flow oxygen devices
3. They require lower oxygen flows to achieve a given FIO2 than do standard nasal cannulas
4. They are less obstructive (i.e., more cosmetically pleasing) than nasal cannulas
A. 1 and 3 only
B. 2 and 3 only
C. 3 and 4 only
D. 2, 3, and 4 only
C - 3 and 4 only
What is the air-to-oxygen entrainment ratio for delivering 40% oxygen through an air
entrainment mask? - ANSWER A. 2 : 1
B. 1 : 2
C. 1 : 3
