ESCO Light Commercial Refrigeration EXAM 2024/2025 with Complete Solutions.
6 views 0 purchase
Course
ESCO
Institution
ESCO
ESCO Light Commercial Refrigeration EXAM 2024/2025 with Complete Solutions. In a dry type (direct expansion) evaporator, liquid refrigerant must boil away as close to the end of the coil as possible in order to: A. operate at high efficiency. B. ensure that frost does not accumulate. C. sub-cool th...
ESCO Light Commercial Refrigeration EXAM 2024/2025
with Complete Solutions.
In a dry type (direct expansion) evaporator, liquid refrigerant must boil away as close to
the end of the coil as possible in order to: - ANS-
The difference between the temperature of the refrigerant boiling in the evaporator and
the temperature at theevaporator outlet is known as: - ANS-
An expansion device that is stuck open will cause: - ANS-
When measuring evaporator superheat on a commercial system that has a long suction
line, the pressure reading should be taken at the: - ANS-
Superheat measurements are best taken: - ANS-
Atechnician is checking the superheat on a multi-circuit evaporator and finds one of the
circuits has a superheat that is higher than the others. This could be caused by: - ANS-
A TEV with an external equalizer is used on: - ANS-
Dry type evaporators operate most efficiently with a superheat setting of approximately:
- ANS-
An evaporator used to chill liquids si operating with a normal superheat setting, but the
system is not cooling the product properly. Which of the following is the most likely
cause? - ANS-
What time interval is required between each superheat adjustment? - ANS-
Alow temperature evaporator used for cooling space or product refrigeration: - ANS-
Some special applications use aflooded evaporator (operated full of refrigerant). nI
order to maintain the proper level of liquid refrigerant, a
type metering device is used. - ANS-
A properly functioning condenser will first; - ANS-
The effect of an inefficient water cooled condenser will; - ANS-
, The refrigerant condensing temperature in a water cooled condenser is normally about
higher than the leaving water. - ANS-
The refrigerant in an air cooled condenser will normally condense at approximately
higher temperature than the air passing over it. - ANS-
Workable head pressure during periods of lowambient temperature can be achieved by
using; - ANS-
Cooling towers that pass air over water to remove system heat are limited in capacity
by: - ANS-
Parallel compressors often referred to as a rack system may use; - ANS-
The major difference between a cooling tower and an evaporative condenser is: - ANS-
Multiple compressors provide: - ANS-
Adirty evaporator and subsequent low evaporator pressures will cause: - ANS-
he thermostatic expansion valve (TV) maintains a constant__________ in the
evaporator. - ANS-
What type of ice si made with a commercial cie maker that uses a gear motor and
auger? - ANS-
Some capillary tube systems take advantage of heat exchange by soldering the
capillary tube to the suction line. In order to obtain the correct superheat reading, it must
be taken: - ANS-
A_____________is usually required for ultra-low temperature applications. - ANS-
A hot gas defrost cycle can be initiated by a: - ANS-
When the defrost cycle is terminated, the evaporator fans will: - ANS-
An off-cycle defrost method is often used on evaporators operating at a minimum of; -
ANS-
Excessive frost on the evaporator causes: - ANS-
Automatic pump down systems are used to prevent: - ANS-
An automatic pump down system requires a: - ANS-
Short cycling ina pump down system is most likely caused by a leaking: - ANS-
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 Prose1. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.49. You're not tied to anything after your purchase.
