unit 3

Refrigeration can be described as ____.

• the process of making products cold

• the process of introducing heat to a location where it is not wanted

• the process of removing heat from a place where it is not wanted to a place where it makes little or no difference

• none of the above

The pressure in a refrigeration system is changed in the ____.

• condenser and compressor

• compressor and metering device

• expansion device and evaporator

• condenser and evaporator

The refrigerant in a refrigeration system changes state in the ____.

• condenser and compressor

• compressor and expansion device

• expansion device and evaporator

• condenser and evaporator

At what location or locations in a refrigeration system does the saturation pressure correspond to the saturation temperature?

• compressor and evaporator

• evaporator and condenser

• condenser and expansion device

• compressor

What happens when room temperature soda is poured into a glass of ice?

• The ice gets colder.

• The ice melts because it is giving up the "cold" to the soda.

• The ice melts because it is absorbing heat from the soda.

• The ice melts because it creates a pressure change.

Ice melts in iceboxes because ____.

• Heat flows through the insulated walls.

• Heat enters when the door is opened

• Heat enters when warm food is placed in the icebox.

• All of the above

High temperature refrigeration is that produced by ____.

• heat from a furnace

• an air-conditioning system

• the vegetable cooling system of a refrigerator

• the freezer section of a refrigerator

A ton of refrigeration is equal to ____.

• 1 ton of ice

• 288,000 Btu/24-hr.

• 144 Btu/hr.

• 12000 Btu/min.

The evaporator in a refrigeration system ____.

• reduces the boiling point of the refrigerant

• condenses the refrigerant

• absorbs heat from the product to be cooled

• compresses the refrigerant vapor

The compressor in a refrigeration system ____.

• rejects heat from the refrigerant

• pumps the refrigerant throughout the system

• both a and b

• none of the above