Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read 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.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
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

Refrigeration

FPE Final Exam

Refrigerants have a large _____ _____ and low _____ ______. latent heat, boiling point
Define latent heat. A quantity of heat added or removed during a phase change.
The boiling point for a refrigerant can be adjusted by changing ______. pressure
The freezing temperature of a refrigerant should be below the _____ temperature. evaporator
T or F: The critical temperature for a refrigerant should be sufficiently low. False
____ as a refrigerant has a very high latent heat of vaporization. Ammonia
What happens in the evaporator of a refrigeration system? Liquid refrigerant vaporizes to a gaseous state.
T or F: Refrigerator space decreases the temperature of the surroundings. True
What are the two types of evaporators for a refrigeration system? Direct-expansion, indirect-expansion
T or F: Direct-expansion evaporators are used when cooling is desired in several locations in a system. False
Refrigerant enters the compressor in a ____ state at ____ pressure and temperature. vapor, low
The compressor raise the _____ and _____ of the refrigerant. pressure, temperature
What are the three types of compressors? Reciprocating, centrifugal, rotary
What is the purpose of a condenser in a refrigeration system? Transfers heat from the refrigerator to another medium.
What is the purpose of an expansion valve in a refrigeration system? Controls the flow of liquid refrigerant to the evaporator.
Define flashing. When the heat given up by refrigerant is used to convert some liquid into vapor.
Define cooling load. The rate of heat energy removed from a given space in order to lower the temperature of that space to a desired level.
Multi-stage refrigeration systems involve more than one _____. compressor
T or F: Multi-stage refrigeration systems cause an decrease in total power requirement. True
Created by: goberoi