NRG 111

Question 1

What is power?

Answer 1

The rate at which energy is transferred.

Question 2

What is energy?

Answer 2

The ability to do work. It is the force that makes things happen.

Question 3

What is the first law of thermodynamics?

Answer 3

That energy is neither created or destroyed.

Question 4

What is the second law of thermodynamics?

Answer 4

Entropy. When energy is converted it becomes more disorganized.

Question 5

What type of energy warms windows?

Answer 5

Radiant energy

Question 6

What is s BTU

Answer 6

British Thermal Unit

Question 7

How much energy from light in a building is assumed to be converted into energy?

Answer 7

100% the total kWh load

Question 8

What is temperature?

Answer 8

Temperature is the average amount of kinetic energy contained within a substance.

Question 9

What is thermal energy?

Answer 9

The total amount of kinetic energy contained within a substance

Question 10

In what direction does NET energy travel?

Answer 10

From warm areas to cool areas.

Question 11

How many ways is heat transfered?

What are they?

Answer 11

Three ways.

Conduction, convection and radiation

Question 12

which wavelengths are associated with warmer temperatures?

Answer 12

Longer wavelength towards the visible end of the light spectrum.

Question 13

What is sensible heat transfer?

Answer 13

Heat that results in a change in temperature.

Question 14

What is latent heat transfer?

Answer 14

Heat that is released or absorbed during phase changes that does not result in a change in temperature.

Question 15

What is latent heat of vaporization?

Answer 15

970Btu/lb

Question 16

What is the latent heat of fusion?

Answer 16

144btu/lb

Question 17

What is the boiling point of water?

Answer 17

212 degrees Fahrenheit

Question 18

What happens during the evaporation process?

Answer 18

Heat is absorbed

Question 19

What happens during the condensation process?

Answer 19

Heat is released

Question 20

What is the technical term for the refrigeration cycle?

Answer 20

The vapor compression refrigeration cycle.

Question 21

What is the unit outside of a house called?

Answer 21

The outdoor unit

Question 22

What is the unit inside a house called?

Answer 22

The indoor unit

Question 23

Can an outdoor unit act as both a condesor and evaporator?

Answer 23

Yes

Question 24

What does a compressor do?

Gas goes in what in what end and comes out as what on the other?

Answer 24

It compresses then increasing pressure and therefore increasing temperature.
its compressed so it goes in cool on one end and hot on the other.

Question 25

What does an expansion valve do?

the coolant goes in what on one end and out what on the other?

Answer 25

Restricts flow reducing pressure and therefore decreasing temperature.
The pressure is reduced so gas goes in cool and comes out the other end as an even cooler liquid.

Question 26

What are the three components of combustion?

Answer 26

Oxygen heat and fuel

Question 27

What is the biproduct of combustion?

Answer 27

Carbon Monoxide

Question 28

What is a minisplit system?

Answer 28

It is a system that works the same as a heat pump except for that these systems dont require ductwork and have miniature version heat pumps in each individual zone.

Question 29

what kind of system do most homes have?

Answer 29

A split system

Question 30

What type of energy using equipment is considered seasonal?

Answer 30

A.C’s and Furnaces

Question 31

What is an example of a system that is considered base load?

Answer 31

Hot water boiler for a home.

Question 32

what is the formula for heating index?

Answer 32

btu/ft^2*hdd