Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

CFC Type 3

EPA 608 Type 3 Flash Cards

QuestionAnswer
What CFC refrigerant is most commonly used in Type III low-pressure chillers? R-11
Why do Type III CFC systems operate below atmospheric pressure? Because refrigerants like R-11 have very low boiling points at low pressure.
What major problem occurs when a leak develops in a low-pressure CFC system? Air and moisture are drawn into the system due to the vacuum.
What device removes air and non-condensables from a Type III CFC chiller? A purge unit.
What evacuation level must be reached when servicing a low-pressure CFC appliance? 25 mm Hg absolute.
Why must moisture be kept out of CFC low-pressure systems? It reacts with refrigerant and oil to form acids that damage the system.
What is the first step when recovering refrigerant from a low-pressure CFC system? Raise the system pressure by warming the refrigerant.
Where should refrigerant be removed from in a Type III system? The liquid phase.
What happens if non-condensable gases remain in a low-pressure CFC system? They increase system pressure and reduce efficiency.
Why were CFC refrigerants like R-11 phased out? Because they damage the ozone layer.
What type of equipment can be worked on with Type III certification? Low pressure
The most efficient method of leak checking a charged low-pressure refrigeration unit is to? pressurize the system by the use of controlled hot water or heater blankets
When pressurizing a system, do not exceed 10 PSIG
After reaching the required vacuum on an appliance when servicing, moisture is indicated by multiple rises in pressure over a period of time with increase of pauses between rises
EPA required evacuation levels for recovery or recycling equipment manufactured or imported before Nov. 15, 1993 is? 25 inches HG
What can be used to pressurize a chiller system before opening the system for a non-major repair? controlled hot water
When installing more than one, pressure relief valves must be installed in what? parallel
The owner must keep records of refrigerant added during service and maintenance on equipment with charges of? 50 lbs or greater
After all the liquid has been removed from an average 350 ton approximately how much vapor refrigerant remains in the system? 100 lbs
When charging a system with a low pressure refrigerant should be introduced as a vapor to raise saturation temperature to a min of? 36 degrees
The rupture disk on a low-pressure chiller has a burst pressure of; 15 PSIG
under ASHRAE Standard 34, R-134 a is classified as A1
In a low-pressure chiller, air and other non-condensables collect at the; top of the condenser
Where is the purge unit located in a low-pressure system? the top of the condenser
How long would an equipment owner or operator have to retrofit or retire an appliance that has exceeded the threshold leak rate if the replacement appliance uses 50 pounds or more of an exempt refrigerant? 18 months
low-pressure chiller used for comfort cooling must be repaired if it has an annual leak rate of ____ of the total charge. 10 percent
If a strong odor is detected during the recovery process, a compressor burnout may have occurred
Which of the following best describes the refrigerant recovery process from an R-123 system? Start with liquid removal and then switch over to vapor recovery.
When leak testing a low-pressure chiller, the maximum pressure to use is; 10 psig
To repair a chiller operating with R-22, the technician; must have a Type II certification.
Which of the following refrigerants has a safety classification of B-1 HCFC-123 (R-123)
Created by: AHR-160
 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards