Chapter 37: Storage and Delivery of Medical Gases

Chapter 37: Storage and Delivery of Medical Gases

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

1. Which of the following is/are considered therapeutic gases?
2. O₂
3. O₂–NO mixture
4. O₂–He mixture
5. N₂O

ANS:  D

Although there are many commercially produced gases, only a few are used medically (Table 37-1).

DIF:    Recall             REF:   p. 888            OBJ:   1

2. What is the fire-risk classification of N and CO₂?

ANS:  D

See Table 37-1.

DIF:    Recall             REF:   p. 888            OBJ:   1

3. Which of the following medical gases support combustion?
4. O₂
5. N₂O
6. compressed air
7. CO₂

ANS:  D

See Table 37-1.

DIF:    Recall             REF:   p. 888            OBJ:   1

4. Which of the following statements regarding O₂ is false?

ANS:  C

Oxygen is a colorless, odorless, transparent, and tasteless gas. It exists naturally as free molecular oxygen and as a component of a host of chemical compounds. Oxygen constitutes almost 50% by weight of the earth’s crust and occurs in all living matter in combination with hydrogen as water. At standard temperature, pressure, and dry (STPD), oxygen has a density of 1.429 g/L, being slightly heavier than air (1.29 g/L). Oxygen is not very soluble in water.

DIF:    Recall             REF:   p. 888            OBJ:   1

5. What factors affect the combustion-supporting properties of O₂?
6. concentration
7. partial pressure
8. humidity

ANS:  C

Oxygen is nonflammable, but it greatly accelerates combustion. Burning speed increases with either (1) an increase in oxygen percentage at a fixed total pressure or (2) an increase in total pressure of oxygen at a constant gas concentration. Thus, both oxygen concentration and partial pressure influence the rate of burning.

DIF:    Recall             REF:   p. 888            OBJ:   1