Grant Simpson HVAC/R Evacuation Quiz March 7, 2022, 9:36 pm

By March 8, 2022

Grant Simpson HVAC/R Evacuation Quiz March 7, 2022, 9:36 pm

Check out our most recent video

Head Trash

Our latest Podcast

HVAC School – For Techs, By Techs

Real training for HVAC ( Heating, Ventilation, Air Conditioning and Refrigeration) Technicians. Including recorded tech training, interviews, diagnostics and general conversations about the trade.

This podcast is Bryan’s full-length electrical basics class for the Kalos technicians. He covers electrical theory and circuit basics.

Volts, resistance, and amps all affect the behavior of electricity in circuits. These are also critical factors in electrical safety. Watts and kilowatts come from the multiplication of the volts and amps, though not every volt-amp does work; the power factor indicates how much work the volt-amps are actually doing. Some of the volt-amps are reactive (kVAR) and don’t do the real power of watts.

Electrons move by interacting with other atoms. Substances can be conductors or insulators, and conductors have very few valence electrons, which move in and out of other atoms easily. Insulators have many valence electrons and are more stable. Insulators have high resistance, and conductors tend to have low resistance.

Circuits consist of loads, switches, and power supplies. Loads actually do things and consist of light bulbs and motors. Switches pass power and don’t do work. Power supplies can be finite, like batteries, but also include transformers that take power from the utility company. Open circuits don’t move electricity, but closed circuits create a complete path that allows electrons to move. Electricity takes all available paths, not just the path of least resistance.

Bryan also covers:

Electricity and the body
GFCIs and AFCIs
Shock and arc flash protection
Lockout/tagout
Electricity and fall hazards
Energy transfer
Resistive vs. inductive loads
Magnetism and flux
Direct current (DC) vs. alternating current (AC)
How power companies and generators work
Open vs. short circuits
“Path of least resistance”
Tripping breakers
Electrical units of measurement
Step-up and step-down transformers
Electrical frequency (hertz)
Variable frequency drives (VFDs)
Microfarads and capacitors
Parallel and series circuits
Becoming more proficient at reading diagrams

If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE.

Check out our handy calculators HERE.

Search Episodes

Electrical Basics

10/06/2022

Bryan Orr

Myth: Path of Least Resistance – Short #154

10/04/2022

Bryan Orr

Dehumidification in Shoulder Seasons w/ Nikki

09/29/2022

Bryan Orr

Time Management – Short #153

09/27/2022

Bryan Orr

Become a Better Mentor w/ Eric Kaiser

09/22/2022

Bryan Orr

HVAC Measurement Types and Benefits

09/15/2022

Bryan Orr

Ventilation and 62.2 Intro & Rant w/ Genry Garcia

09/08/2022

Bryan Orr

Pressure Enthalpy without Tears

09/01/2022

Bryan Orr

Total Heat of Rejection – Short #152

08/30/2022

Bryan Orr

Hard Start vs. Easy Start

08/25/2022

Bryan Orr

Search Results placeholder

Related Tech Tips

Change O-rings, Not Hoses

Make the most of those expensive refrigerant hoses.

Get (and Give) More From Remote Training

Most of the content in this article is based on Alex Meaney’s contribution to the HVAC School podcast in the October 2nd, 2020 episode: “How to Get The Most From Online Education,” which you can listen to HERE. Attending a class from your bedroom or home office sounds very convenient, right? That was probably what […]

What Techs Need to Know About A2L Refrigerants

This article is based on the recent HVAC School podcast episode on A2L refrigerants with Jason Obrzut. You can listen to that podcast HERE. Jason is a member of the AHRI Safe Refrigerant Transition Task Force and has co-authored Refrigeration and Air Conditioning Technology (the RACT manual). You can access AHRI’s A2L refrigerant resources at […]

More tech tips