Commercial Refrigeration
Certification Exam Questions with
Correct Verified Solutions 100%
Guaranteed Pass (Latest Update)
Tube within a tube, shell and coil, and shell and tube are all types of:
A. water cooled condensers.
B. air cooled condensers.
C. receivers.
D. accumulators. - ANS ✓A. water cooled condensers.
The refrigerant condensing temperature in a water cooled condenser is
normally about ____ higher than the leaving water.
A. 100°F
B. 10°F
C. 30°F
D. 75°F - ANS ✓B. 10°F
The refrigerant in an air cooled condenser will normally condense at
approximately _____ higher temperature than the air passing over it.
A. 10°F
B. 30°F
C. 75°F
D. 100°F - ANS ✓B. 30°F
Commercial Refrigeration Certification
, 2
Commercial
Workable head pressure during periods of low ambient temperature can be
achieved by using:
A. an economizer
B. evaporator dampers
C. evaporator flooding
D. fan-cycle control - ANS ✓D. fan-cycle control
Cooling towers that pass air over water to remove system heat are limited in
capacity by:
A. outside air wet bulb temperature.
B. outside air dry bulb temperature
C. inside air wet bulb temperature.
D. inside air dry bulb temperature. - ANS ✓A. outside air wet bulb
temperature.
One of the main reasons that reciprocating compressors are not 100%
efficient is:
A. CFC refrigerants.
B. clearance volume.
C. evaporator design
D. condenser design. - ANS ✓B. clearance volume.
An open drive compressor is most likely to develop a refrigerant leak at the:
A. valve plate.
B. suction service valve.
C. discharge service valve.
D. shaft seal. - ANS ✓D. shaft seal.
Commercial Refrigeration Certification
, 3
Commercial
Multiple compressors provide:
A. positive on return.
B. lower humidity in high humidity locales.
C. capacity control
D. zone control. - ANS ✓C. capacity control
A dirty evaporator and subsequent low evaporator pressures will cause:
A. high compression ratios.
B. low compression ratios.
C. high head pressure
D. high suction pressure. - ANS ✓B. low compression ratios.
The thermostatic expansion valve (TEV) maintains a constant _____ in the
evaporator.
A. temperature
B. pressure
C. liquid level
D. superheat - ANS ✓D. superheat
The automatic expansion valve (AEV) maintains a constant _____ in the
evaporator.
A. temperature
B. pressure
C. liquid level
D. superheat - ANS ✓B. pressure
Commercial Refrigeration Certification
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 DoctorKen. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.
