CFESA Refrigeration Certification Test Study Guide with Complete Solutions
5 views 0 purchase
Course
CFESA
Institution
CFESA
CFESA Refrigeration Certification Test
Study Guide with Complete Solutions
1. The function of the compressor is : - Answer️️ -B. to lower the pressure
in the evaporator so that the refrigerant temperature is lowered below the
temperature of the air in the box .
2 . Forced air evaporator co...
CFESA Refrigeration Certification Test
Study Guide with Complete Solutions
1. The function of the compressor is : - Answer✔️✔️-B. to lower the pressure
in the evaporator so that the refrigerant temperature is lowered below the
temperature of the air in the box .
2 . Forced air evaporator coils are commonly used because : - Answer✔️✔️-
A. they absorb more heat in less time .
3 . Evaporator A operates with a 5 ° TD and evaporator B operates with a
15⁰ TD . - Answer✔️✔️-D. Box A operates with higher humidity than box B
4 Whenever you re soldering refrigerant lines : - Answer✔️✔️-D. B & C
5 . R404A must be charged into a system : - Answer✔️✔️-A. In a liquid state
6 . If an evaporator fan motor needs to be replaced it must be replaced with
: - Answer✔️✔️-C. Any motor with the exact HP , speed , voltage , mounting
and rotation
7 . The fan blade on an evaporator or condenser must be positioned in the
housing or shroud so that : - Answer✔️✔️-B. The blade is mounted mid way
into the evaporator housing opening or fan shroud opening on a condenser
.
8. Which of the following refrigerants is an interim choice for a replacement
for R - 12 in a system that had a leak in the condenser and lost all of its
refrigerant ? - Answer✔️✔️-C. R - 409A
9 . Which refrigerant is an interim refrigerant choice for a R502 system that
had a major leak in the evaporator - Answer✔️✔️-d . R408A
10 . When evacuating a refrigeration system what tool is needed to ensure a
good evacuation and to help inform you if there is any moisture or leaks in
the system : - Answer✔️✔️-B. Micron gauge
11 . Which refrigerant would you convert a walk in freezer to if replacing
the condensing unit on an R502 system : - Answer✔️✔️-B. R404A
12 . Which phrase best describes the proper use for a refrigerated box using
a cap tube system ? - Answer✔️✔️-A. Storage freezer
13 . Which is the best example of the definition of a storage box ? -
Answer✔️✔️-A. A freezer on which the door is opened 8 times a day
14 . In order to maintain proper temperature under the various loads , a
cooler or freezer located on a front prep line must be equipped with : -
Answer✔️✔️-C. A thermal expansion valve
15 . A cap tube is ineffective on most commercial refrigeration systems
because : - Answer✔️✔️-D. it cannot respond to the refrigerant needs under
heavy loads
16 . The sensor bulb on a TEV must be : - Answer✔️✔️-C. mounted tight to a
clean surface on the suction line close to the outlet of the coil
17 . An automatic expansion valve does not : - Answer✔️✔️-C. react well in
situations of heavy loads .
18 . For maximum efficiency the thermal expansion valve superheat for a
freezer should be about : - Answer✔️✔️-A. 5 degrees
19 . For maximum system efficiency the TEV superheat for a cooler should
be about : - Answer✔️✔️-C. 8-10 degrees
20 . What type of oil is most commonly used with CFC refrigerants ? -
Answer✔️✔️-C. Mineral
21 . What type of oil must be used with R404A ? - Answer✔️✔️-D.
Polyolester
22 . What pressure relates to 20 ° F on R404A ? - Answer✔️✔️-56.7 psi
23 . What should be the maximum head pressure for a R404A system
operating in a 85 ° F ambient temperature ? - Answer✔️✔️-294 psi
24 . A system with R134A is operating at 146 psi head pressure . The
temperature measured four inches out of the condenser is 100 ° F . The
ambient air temperature is 80 ° F . - Answer✔️✔️-D. the subcooling is 10 °
25 . A system operating with refrigerant R404A has a suction pressure of 29
psi . The head pressure is 239 psi . The temperature on the line out of
3
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 or Stuvia-credit 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 SophiaBennett. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
