× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
1
1
New Topic  
Geazy Geazy
wrote...
Posts: 534
Rep: 0 0
6 years ago
A stationary liquid oxygen system contains 80 lb of oxygen when full. A home care patient is using it 8 hours each day, during sleep, at a rate of 3 L/min. At this usage, how many days will the liquid oxygen last?
 
  a. 6 c. 19
  b. 8 d. 27



Q. 2  Storage of a portable liquid oxygen system adjacent to a heat source will _____ the _____ of the oxygen.
 
  a. Increase; pressure c. Decrease; pressure
  b. Increase; venting d. Decrease; venting



Q. 3  According to the NFPA, the minimum distance for a place of public assembly from a bulk oxy-gen storage system is how many feet?
 
  a. 10 c. 25
  b. 15 d. 50



Q. 4  Which of the following G size oxygen cylinders will run out of oxygen first? Pressure Flow (psig) (L/min)
 
  a. 700 1.5 c. 1100 2.5
  b. 900 1.0 d. 1600 3.0



Q. 5  An H size oxygen cylinder with 1600 psig has a set flow rate of 3 L/min. It will take _____ hours and _____ minutes to reach 300 psig.
 
  a. 17; 24 c. 22; 40
  b. 21; 25 d. 27; 54



Q. 6  Which of the following E size oxygen cylinders will last the longest? Pressure Flow (psig) (L/min)
 
  a. 1600 3 c. 800 2
  b. 1400 2.5 d. 400 1
Read 38 times
3 Replies

Related Topics

Replies
wrote...
6 years ago
(Answer to Q. 1)  ANS: C
Use the liquid oxygen duration formula as given previously.
A liter of liquid oxygen weighs 2.5 lb, so: 80 lb/2.5 = 32 L.
Gaseous oxygen occupies a volume that is 860 times the volume of liquid oxygen, so: liters of liquid  860 = liters of gas.
Duration of supply (minutes) = gas supply remaining (in liters)  flow (liters/minute).
Once you get the answer in minutes, you divide by 60 to obtain the number of hours. Then di-vide the number of hours by the usage, which is 8 hr/day; that gives you 19 days.

(Answer to Q. 2)  ANS: B
Liquid oxygen units should not be located adjacent to heat sources, which can accelerate the venting of oxygen.

(Answer to Q. 3)  ANS: D

(Answer to Q. 4)  ANS: C
This answer was derived from the following formula:

(Answer to Q. 5)  ANS: C
The same formula as described in the previous question is used here; however, you first have to subtract 300 psig from 1600 psig to get the exact duration for 1300 psig. (1300  3.14)/3 = 1360.7 minutes/60 = approximately 22 hours 40 minutes.

(Answer to Q. 6)  ANS: B
This answer was derived from the following formula:
Geazy Author
wrote...
6 years ago
Passed my quiz with this!
wrote...
6 years ago
Tell your classmates
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  953 People Browsing
Related Images
  
 989
  
 294
  
 1022
Your Opinion
Do you believe in global warming?
Votes: 422