Residential wiring

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What is battery?

A group of connected electrochemical cells

What is a hybrid AC/DC micro grid?

A localized electrical grid or network that operates on AC/DC and can be disconnected from the traditional electric grid or smart grid to operate on its own power source

What is an AC generator?

A machine that converts mechanical energy into AC electricity

What is a DC generator?

A machine that converts mechanical energy into DC electricity

What is a generator?

A machine that converts mechanical energy into electrical energy by means of electromagnetic induction

What is current?

A measure of the amount of electrons going through a circuit

What is a heat pump?

A mechanical compression refrigeration system containing devices and controls that reverse the flow of refrigerant to move heat from one area to another

What is a smart home?

A residence that contains equipment, appliances, and software that are designed to provide security, energy management, and convenience

What is a micro grid?

A small local electrical network or grid that can operate completely separate from the main electrical grid

What happens when a coil of wire is rotated in a magnetic field?

A voltage is induced in the coil

Traditionally, residences have only been wired for what type of current?

AC

What is a transformer?

An electrical device that uses electromagnetism to change (step up or step down) AC voltage from one level to another

What is a smart grid?

An electrical grid in which electricity is delivered and monitored from a power source to an end user

An electrochemical device that combines hydrogen and oxygen to produce electricity

Fuel cell

What are the benefits of direct DC connection?

More efficient for powering electronic devices because an adapter is not required. A direct DC connection eliminates the energy loss from DC to AC and AC to DC conversion.

Wind turbine systems and solar PV systems must be installed per all ___ requirements and must be equipped with proper disconnects

National Electrical Code (NEC)

The generator of a hydroelectric power plant is connected to a ___ which causes the generator to rotate and convert mechanical energy into electrical energy

Turbine

What is a wet cell?

Two electrodes in a liquid electrolyte solution that are used to create a chemical reaction

What is a dry cell?

Two electrodes in an electrolyte paste that are used to create a chemical reaction

What is DC voltage?

Voltage that causes current to flow in one direction only

What is AC voltage?

Voltage that causes current to reverse its direction of flow at regular intervals or cycles

When is voltage produced?

When electrons are freed from atoms by Electromagnetism (generators) Chemicals (batteries) Sunlight (PV cells) Heat (thermocouples) Pressure/vibrations (microphones) Friction (static electricity)

A power generation system that converts the kinetic energy of wind into mechanical energy, which is used to rotate a generator that produces electrical energy

Wind turbine

Where does geothermal energy come from?

heat within the earth

What are the two basic forms of energy?

kinetic energy and potential energy

What is the formula for determining energy efficiency?

n=Eo/Ei x100%

What is resistance?

the opposition to the flow of electric charge

Ohm's Law

the relationship between voltage, current, and resistance

In three-phase generators, the three separate coils are spaced ___ electrical degrees apart

120

To earn the Energy Star label, a residential home must be at least ___% more efficient than those built of code

15

What is electrochemical power source?

A device that uses chemical reactions to produce or store electrical energy

The most common power source that provide DC voltage in a residence, have positive and negative terminals that are often easily identified

Batteries

Photovoltaic (PV) cells use silicon wafers, called "___," that are sensitive to light and produce a small direct current when exposed to light

Cells

A generator that includes series and shunt field windings

Compound-wound generator

When a heat pump is in the ___ mode, the indoor unit is the evaporator and the outdoor unit is the condenser

Cooling

A US government program that mandates limits on the power consumption of electrical equipment

Energy Star

A solution of acid in water

Liquid electrolyte

Standard unit of resistance

Ohms [baby omega]

What is interactive distributed generation?

On site power generation where switchgear can activate additional generation sources on demand

A ___ power plant is a back up power plant that is reserved to run only during times of increased demand

Peaker

A device that converts AC voltage to DC voltage by allowing the voltage and current to move in only one direction

Rectifier

A cell that can be recharged

Secondary cell

A generator that has its field windings connected in series with the armature and the external circuit (load)

Series-wound generator

The wires installed between the meter fitting (socket) and the disconnecting means (main breaker, fuse box, or breaker panel) inside a dwelling

Service entrance

A generator that has its field windings connected in parallel (shunt) with the armature and the external circuit (load)

Shunt-wound generator

The most commonly used voltage in a residence

Single-phase AC voltage

The power produced by a fuel cell depends on several factors, including the fuel cell type, ___, temperature at which it operates, and pressure at which gases are supplied

Size

An environmentally responsible and energy-efficient residence many include the addition of ___

Solar photovoltaic (PV) panels

What are the other sources of renewable energy?

Solar thermal and geothermal energy

What are the three main sources of renewable energy?

Sun, wind, and water

What is a electromagnetic induction?

The ability of a coil of wire to induce a voltage in another circuit or conductor

What is voltage?

The force or electrical potential between two points

What is distributed power generation?

The generation of power on site or in close proximity to where the power is used


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