Chapter 37 Storage and Delivery of Medical Gases

Chapter 37  Storage and Delivery of Medical Gases

Complete Chapter Questions And Answers
 

Sample Questions

MULTIPLE CHOICE

1. Which of the following is/are considered therapeutic gases?
1. O2
2. O2–NO mixture
3. O2–He mixture
4. N2O
a.
1 and 2
b.
2 and 4
c.
3 and 4
d.
1, 2, and 3

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?
a.
flammable
b.
supports combustion
c.
inflammable
d.
nonflammable

ANS: D
See Table 37-1.

DIF: Recall REF: p. 888 OBJ: 1

3. Which of the following medical gases support combustion?
1. O2
2. N2O
3. compressed air
4. CO2
a.
1 and 4
b.
2 and 3
c.
1, 2, and 3
d.
1, 3, and 4

ANS: D
See Table 37-1.

DIF: Recall REF: p. 888 OBJ: 1

4. Which of the following statements regarding O2 is false?
a.
It is only slightly soluble in water.
b.
It is odorless and transparent.
c.
It is flammable.
d.
It is heavier than air.

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?
1. concentration
2. partial pressure
3. humidity
a.
1
b.
2
c.
1 and 2
d.
1, 2, and 3

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