ACR 101 Unit 3

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

• The ice melts because it is absorbing heat from the soda.
• The ice gets colder.
• The ice melts because it is giving up the "cold" to the soda.
• The ice melts because the soda is colder than the ice.

Ice melts in iceboxes because ____.

• All of the above.
• heat flows through the insulated walls
• heat enters when the door is opened
• heat enters when warm food is placed in the icebox

High temperature refrigeration is that produced by ____.

• an air-conditioning system
• heat from a furnace
• the vegetable cooling system of a refrigerator
• the freezer section of a refrigerator

Refrigeration can be described as ____.

• the process of removing heat from a place where it is not wanted to a place where it makes little or no difference
• the process of making products cold
• the process of introducing heat to a location where it is not wanted
• None of the above.

A ton of refrigeration is equal to ____.

• 288,000 Btu/24 h
• 1 ton of ice
• 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.

• temperature/pressure
• boiling/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 evaporator
• condenser and compressor
• compressor and expansion device
• expansion device and evaporator

The evaporator in a refrigeration system ____.

• absorbs heat from the product to be cooled
• reduces the boiling point of the refrigerant
• condenses the refrigerant
• 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

The condenser ____.

• rejects the heat from the refrigerant
• adds superheat to the refrigerant
• controls the refrigerant flow throughout the system
• All of the above.