Definitions

Question 1

Temperature

Answer 1

A word used to describe the level of molecular activity expressed in Fahrenheit Rankin Celsius or kelvin

Question 2

British thermal unit

Answer 2

The amount of heat required to raise 1 lb of water to 1°F

Question 3

Conduction

Answer 3

Heat transfer from one molecule to another within a substance or from one substance to another

Question 4

Convection

Answer 4

Heat transfer from one place to another using a fluid medium

Question 5

Radiation

Answer 5

Heat transfer, heat that passes through air heating solid objects that in turn heat the surrounding area

Question 6

Sensible heat

Answer 6

Heat that causes a change in temperature

Question 7

Enthalpy

Answer 7

The amount of heat a substance contains from a predetermined base or point

Question 8

Latent heat

Answer 8

Hidden heat or heat energy being added but no temperature rise occurring

Question 9

Latent heat of vaporization

Answer 9

The latent heat absorbed when refrigerant evaporates.

Question 10

Latent heat of condensation

Answer 10

The latent heat given off when refrigerant condenses

Question 11

Specific heat

Answer 11

The difference in heat rise

Question 12

Refrigeration

Answer 12

The process of removing heat from a place where it’s not wanted and transfer it to somewhere that it does not matter

Question 13

Specific volume

Answer 13

The volume occupied by 1 lb of a fluid

Question 14

Dalton’s law

Answer 14

Gas law that states that the total pressure averted buy a gas mixture is the sum of the pressure of the individual gases

Question 15

Compressor

Answer 15

A vapor pump that pumps vapor from one pressure level to a higher pressure level

Question 16

Condenser

Answer 16

The component in a refrigeration cycle that transfers heat from the system by condensing a refrigerant

Question 17

Evaporator

Answer 17

The component in a refrigeration system that absorbs heat into the system and evaporate the liquid refrigerant

Question 18

Metering device

Answer 18

A valve or small fixed size tubing or orifice that meter liquid refrigerant into evaporator

Question 19

Net refrigeration affect

Answer 19

Is expressed in BTU per pound and is the quantity of heat that each pound of refrigerant absorbs from refrigerated space to produce useful cooling

Question 20

Saturated

Answer 20

When a liquid is saturated - both the vapor and liquid can exist simultaneously.

Question 21

Saturation temperature

Answer 21

The temperature at which a refrigerant will change state.

Question 22

Sub cooled

Answer 22

The temperature of the liquid when it is cooled below its condensing temperature.

Question 23

Superheated

Answer 23

The temperature of vapor refrigerant above it saturation temperature.

Question 24

Temperature pressure relationship

Answer 24

Refers to Temperature pressure relationship of the liquid and vapor in a closed container