Author Question: Which of the following design components of an air injector would result in entraining the great-est ... (Read 25 times)

kwoodring · **on:** Jul 16, 2018

Which of the following design components of an air injector would result in entraining the great-est amount of air? 1. Small orifice jet 2. Large entrainment ports 3. Low-velocity gas flow

a. 1, 2, and 3
b. 1 and 2 only
c. 1 and 3 only
d. 3 only

Question 2

What is the most common application of Bernoulli's principle in respiratory care equipment?

a. Fluidic ventilator
b. Pneumotachygraph
c. Air injector
d. U-tube manometer

mcomstock09 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: B
The amount of air entrained depends on both the diameter of the jet orifice and the size of the air-entrainment ports (Figure 6-27). For a fixed jet size, the larger the entrainment ports, the greater is the volume of air entrained and the higher is the total flow (Figure 6-27, B). The en-trained volume can still be altered, with fixed entrainment ports, by changing the jet diameter (Figure 6-27, C). A large jet results in a lower gas velocity and less entrainment, whereas a small jet boosts velocity, entrained volume, and total flow.

Answer to Question 2

ANS: C
In respiratory care, the most common application of fluid entrainment is the air injector.