Commercial Refrigeration Final Exam Questions From Quizzes with 100% Correct Answers
6 views 0 purchase
Module
Commercial Refrigeration
Institution
Commercial Refrigeration
Commercial Refrigeration Final Exam Questions From Quizzes with 100% Correct AnswersCommercial Refrigeration Final Exam Questions From Quizzes with 100% Correct AnswersCommercial Refrigeration Final Exam Questions From Quizzes with 100% Correct Answers___ are snap-acting valves that open and close ...
commercial refrigeration final exam questions from
commercial refrigeration final exam answers
are snap acting valves that open and close ver
Written for
Commercial Refrigeration
Commercial Refrigeration
Seller
Follow
NursingTutor1
Reviews received
Content preview
Commercial Refrigeration Final
Exam Questions From Quizzes
with 100% Correct Answers
___ are snap-acting valves that open and close very fast when the electrical energy
is applied to the coil. - ANSWER - Solenoid valves
A suction line accumulator is used to ensure that liquid refrigerant enters the
compressor. - ANSWER - False
Defrost using internal heat is accomplished using ____. - ANSWER - hot gas from the
compressor
Helical oil separators are about 58% efficient in separating oil. - ANSWER - False
How does the receiver ensure that only 100% liquid refrigerant enters the liquid
line? - ANSWER - By means of a dip tube.
Frequently on smaller condensing units, one fan will run continuously and the other
fan will be cycled on and off with a(n) ____. - ANSWER - ambient temperature
controller
Oil separators work on the principle of low refrigerant and oil velocity. - ANSWER -
True
Random defrost is accomplished ____. - ANSWER - when the refrigeration system
has enough reserve capacity to cool more than the load requirement
Refrigeration systems are designed to operate year round. For this reason they are
equipped with ____. - ANSWER - a low-ambient control
, The crankcase pressure regulator (CPR) puts a limit on the pressure that can return
to the compressor. - ANSWER - True
Which of the following is a type of low-ambient temperature head pressure control?
- ANSWER - Fan cycling.
Package ice machines store their own ice at ____ºF in a bin below the ice maker. -
ANSWER - 32
Most package ice makers are ____-cooled. - ANSWER - air
The EPR valve is installed in the suction line at the evaporator outlet and it ____. -
ANSWER - -modulates the refrigerant vapor to the compressor
-prevents the boiling point in the evaporator from dropping below a pre-set point
-when used with a TX valve the system has the characteristics of maintaining a
constant superheat and keeping the pressure from going too low
-All of the above.
The normal position for a suction service valve during normal operation is ____. -
ANSWER - -back-seated
-front seated
-midseated
-Any of the three.
The refrigeration compressor motor can be operated at about ____% over its rated
capacity without harm during the pulldown. - ANSWER - 10
To protect a refrigeration compressor when refrigerant loss occurs, a(n)
____________________ control is used. - ANSWER - low pressure
To protect the compressor during periods of hot pull down, a(n) ____ valve is used. -
ANSWER - CPR (crankcase pressure regulator)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller NursingTutor1. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £10.37. You're not tied to anything after your purchase.
