Mechanical Engineering Unit 14 Unit Review Questions Answer Keygo Back Index What The Purpose Condenserthe Purpose

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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?