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10 Cards in this Set
- Front
- Back
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The condenser which is very expensive to clean and requires he tubes to be cleaned with acid and neutralized is the: a) shell and tube condenser b) shell and coil condenser c) double tube condenser d) evaporative condensers e) baffle condensers |
b) shell and coil condenser |
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The common types of water cooled condensers used in refrigeration systems are: (choose all correct answers) a) shell and tube b) shell and coil c) double tube d) plate surface |
a) shell and tube b) shell and coil c) double tube |
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Air cooled condensers of large capacity are found mainly in which of the following locations? a) roof tops b) closed rooms with low air circulation c) warm dry rooms d) cold rooms with low air circulation e) basements in buildings |
a) roof tops |
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Defective condenser operation is a result of the presence of all of the following except a) scale forming chemicals b) dirty cooling water c) noncondensable gases d) low coolant circulation e) loss of compressor lubricating oil |
e) loss of compressor lubricating oil |
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Which of the following statements about double tube condensers is true? a) it consists of two separate tubes side by side b) it cannot be used with air cooled condensers c) water flow in the inner tube is in the opposite direction of the flow of refrigerant d) it has the highest efficiency of the water cooled condensers e) it is a small condenser for a large capacity system |
c) water flow in the inner tube is in the opposite direction of the flow of refrigerant |
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It is not true that a) in flooded chiller and during the high load some liquid refrigerant may leave the evaporator b) finned tube evaporators are the only type that can be applied as the direct expansion evaporator c) plate surface evaporator may be used in the refrigerators and freezers d) finned tube evaporator may contain some small amount of liquid refrigerant in any given time e) the dry type evaporator may contain some small amount of liquid refrigerant in any given time |
b) finned tube evaporators are the only type that can be applied as the direct expansion evaporator |
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The purpose of a condenser in a refrigeration system is to: a) remove the sensible heat from the refrigerant b) remove the latent heat from the refrigerant c) cool the liquid refrigerant d) vaporize the liquid refrigerant e) reduce the pressure in the evaporator |
b) remove the latent heat from the refrigerant |
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An evaporator that contains only a small amount of liquid refrigerant at any time is what type of evaporator a) dry evaporator b) flooded evaporator c) wet evaporator d) bare tube evaporator e) finned tube evaporator |
a) dry evaporator |
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An evaporator which can easily be cleaned and defrosted manually without interrupting the cooling process is: a) bare finned b) finned c) plate surface d) shell and tube e) flooded |
c) plate surface |
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Which of the following statements about the shell and tube evaporator type is false? a) it is also known as a chiller b) this type of evaporator cools mainly liquids c) the refrigerant is circulating in the shall in the flooded operation d) refrigerant vapour is drawn out by the compressor e) the liquid to be cooled circulates through the tubes in the direct expansion operation |
e) the liquid to be cooled circulates through the tubes in the direct expansion operation |
