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UNIT 14 REVIEW QUESTIONS ANSWER KEY GO BACK TO INDEX
14-1) What is the purpose of a condenser?
14-2) Describe the changes in the refrigerant as it passes through the condenser.
The superheat must be removed first before the refrigerant can condense.
14-3) What do environmental concerns have to do with water-cooled condensers?
14-4) Why is subcooling important?
14-5) How much additional cooling capacity would 20°F of subcooling have on a
refrigerant system?
14-6) List the three types of condensers used with HVACR systems.
14-7) How much heat must a condenser be able to dissipate?
14-8) What would the expected condensing temperature be for an air-cooled
condenser on a 100°F day?
14-9) What advantage are there to using a remote air-cooled condenser?
14-10) What are some ways that an air-cooled condenser can be made more efficient?
14-11) Why would a building need air conditioning if the outdoor temperature is
35°F?
14-12) List the different types of low ambient controls for air-cooled condensers.
14-14) What can happen to a water-cooled condenser if the refrigerant is recovered
improperly?
14-15) What can be placed in the water line on a wastewater system to keep the head
pressure constant?
14-16) What does a cooling tower do?
14-17) What water conditions must be monitored to keep a cooling tower system
working properly?
14-18) What can happen to a cooling tower if the water is not treated?
14-19) Compare the discharge pressure and operational cost of air-cooled condensers
versus water-cooled condensers.
14-20) List some of the factors that can cause the condensing temperature to be too
14-21) List some of the factors that can cause the condensing temperature to be too
high on an air-cooled system?
14-22) List the methods of reclaiming condenser heat?
14-23) What is the purpose of the fins on finned tube coils?
14-24) Explain how an evaporative condenser works.
14-25) What is the difference between open and closed cooling towers?
14-26) What type of water-cooled condenser is easiest to clean?
14-27) Which requires more maintenance: air cooled condensers or water-cooled
condensers?
14-28) What problems can be created if the system high side pressure is too low?
14-29) What is the most important operating characteristic to check whenever
working on a water-cooled system?
