Evaporators and Condensers Objective 1

What is the purpose of learning about evaporators and condensers?

• To study ancient civilizations

• To learn about plant biology

• To select and maintain heat transfer devices for refrigeration and air conditioning systems

• To repair electrical circuits

Which of the following is NOT an objective of the module?

• Describe service and repair of evaporator and condensers

• Explain the operation of a microwave oven

• Describe evaporator components and their applications

• Define terms related to evaporators and condensers

What is the main difference between a floral cooler and a long term ice cream holding freezer in terms of evaporator requirements?

• Both require the same type of evaporator coil

• Neither requires an evaporator coil

• The floral cooler requires a coil with low airflow, while the ice cream freezer requires a coil with high airflow

• The floral cooler requires a coil with high airflow, while the ice cream freezer requires a coil with low airflow

What determines the spacing of fins on an evaporator?

• The color of the fins

• The humidity level in the room

• The operating temperature of the coil

• The size of the refrigerant tube

Which method of refrigerant feed is the most popular in commercial usage?

• Liquid Overfeed

• Dry Expansion

• Flooded

• None of the above

What is the conductance factor in relation to an evaporator?

• The rate of heat transfer between the refrigerant and the air

• The rate of heat transfer between the evaporator and the condenser

• The rate of heat transfer between the evaporator and the compressor

• The rate of heat transfer between the evaporator and the expansion valve

What is the purpose of a surge drum in a flooded evaporator?

• To reduce the efficiency of the evaporator

• To increase the refrigerant charge

• To prevent liquid refrigerant from entering the compressor

• To maintain the refrigerant liquid level

Which type of evaporator is commonly used in commercial refrigeration due to its compactness and low cost?

• Natural Convection Evaporator

• Forced Convection Evaporator

• Flooded Evaporator

• Dry Expansion Evaporator

What is the purpose of the evaporator heat transfer capacity?

• To increase the refrigerant charge

• To control the humidity level in the refrigerated space

• To determine the rate of heat transfer from the refrigerated space to the refrigerant

• To regulate the airflow through the evaporator

What is the main disadvantage of a shell and tube chiller?

• Compact design

• Low refrigerant charge

• Risk of damage from freezing

• Increased efficiency