Unit 03 Refrigeration and Refrigerants CRF

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 the soda is colder than the ice.

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.

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 temperature inside the refrigerator fresh food section should be about ____.

• 25°F

• 30°F

• 35°F

• 40°F

A ton of refrigeration is equal to ____.

• 1 ton of ice

• 288,000 Btu/24 h

• 144 Btu/h

• 12,000 Btu/min

The ____ relationship correlates the vapor pressure and the boiling point of water and is the basis for controlling the cooling system’s temperatures.

• boiling/pressure

• temperature/pressure

• temperature/vapor

• boiling/vapor

The ___ are used to change the vapor to a liquid and the liquid form back into a vapor, the refrigeration cycle.

• condenser and compressor

• compressor and expansion device

• expansion device and evaporator

• condenser and evaporator

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

Reciprocating compressors have ____.

• a piston and cylinder

• two scrolls that mesh together

• a rotor to compress the refrigerant

• a large fan compressor component