Components
Science
Brazing
Troubleshooting
History
100

When installing refrigerant lines.

What is insulating?

100

The heat required to convert a solid into a liquid or vapor, or a liquid into a vapor, without change of temperature.

What is latent?

100

The major temperature that separates soldering and brazing.

What is 840°F?

100

By checking this formula, it will tell you this? 

G-L=

What is Subcool?

100

Earliest written account of the use of a chimney, located in Italy.

When is 1347?

200

In HVACR-related work, this is generally used for conveying gas.

What is black steel pipe?

200

The definition of air conditioning.

What is heat transfer?

200

Refrigerants exposed to extreme heat can produce an extremely dangerous by-product.

What is phosgene gas?


200

This is usually the first step in performing maintenance on an air handler.

What is clean or replace the air filter?

200

According to a popular search engine on the world wide web, the first residential AC unit was installed in this year. 

When was 1914?

300

Steel pipe is not generally used to circulate refrigerant, except in these types systems.

What is ammonia?

300

Formula for Superheat & Subcool.

What is L-G= & G-L=?

300

Most brazing alloys used in refrigeration work contain the element

What is silver?

300

System is in normal operation. But there is no air from the supply vents.

What is blocked air flow?

300

King Arzawa used this method for comfort heating in his palace.

What is a hypocaust or underfloor heating?

400

For this type of system, ductwork is not required.

What is a V.R.F?

400

Testing, and adjusting, to ensure efficient and comfortable operation, distributing air evenly throughout a building or home.

What is air balancing? 

400

The phenomenon in soldering and brazing is the movement of a liquid substance between two solid substances

What is capillary action?

400

This component will cause stress on a motor.

What is a bad capacitor?

400

In the 1800's this was invented for heating a room.

What are Cast iron radiators?

500

A type of tubing commonly used to form evaporators and is less costly than copper.

What is aluminum?

500

Never use this for purging a refrigeration system to remove unwanted dirt and moisture from a line set.

What is Oxygen?

500

This torch flame is recommended for brazing.

What is neutral?

500

The electrical connections to a central air-conditioning condensing unit typically include a this connection for control.

What is 24 Vac?

500

The Man

The Myth

The Mustache 

Who is Tim?