A physician requests that you provide a patient with exactly 40 ...

[futuristic]

A physician requests that you provide a patient with exactly 40 O2 at a flow of 60 L/min. Lacking a blender, you must manually mix air and O2 to achieve the desired mixture at the pre-scribed flow.
 
  Which of the following air and O2 flows would you select?
  Air (L/min) O2 (L/min)
  a. 45 15
  b. 15 45
  c. 40 20
  d. 20 40

Question 2

Which of the following are components of a typical O2 blender? 1. Precision metering device or mixture control 2. Audible dual low-pressure alarm system 3. Pressure regulating and equalizing valves 4. Variable-size air-entrainment port
 
  a. 2 and 4 only
  b. 1, 2, and 3 only
  c. 3 and 4 only
  d. 1, 3, and 4 only

[firehawk60]

Answer to Question 1

ANS: A
Manually mixing air and oxygen to achieve specified concentration at a given flow.
Use Equation 40-3 to compute the O2 flow.

Answer to Question 2

ANS: B

[futuristic]

Thanks for the timely response, appreciate it

[aliotak]

Great answer, keep it coming