Gas Furnaces
Heat Pumps
General HVAC
Troubleshooting
History of HVAC
100
Name two fuel source of a gas-fired furnace
L.P. & Natural Gas
100
Where the heat from a heat pump is gathered
Outdoors
100

Ideal temp for indoor coil for A/C

40 degrees

100
If voltage is read across a fuse what does this indicate
The fuse is blown
100

Why did Carrier design the first "modern" A/C system?

Humidity

200

When fuel is burnt, it produces this harmful gas

Carbon Monoxide

200
Main component found in Heat Pump that is not found in a conventional system.

Reversing Valve

200

What voltage are most heat strips?

240V

200

How could a technician determine if a heat pump reversing valve is defective

Temperature differences (on true suction) on both sides of RV.

200

What year did Carrier stumble upon his "modern" design for A/C?

1902

300

Removes the flue gas from the heat exchanger chamber.

IDM (Draft)

300

Hypothetically, at what temp can you no longer extract heat from a source?

Absolute zero (-459*F)

300

How many phases in our Tune-Up?

6

300

An abnormally high head pressure on your liquid line could indicate _________

Dirty outdoor coil

300

First President to enjoy A/C in the White House.

Herbert Hoover (1929)

400
This component shuts the furnace off in the event of over-heating
High Temperature limit
400

How do you call for the reversing valve?

O or B

400

What temp/pressure state is the refrigerant in when it EXITS the compressor?

High temp, high pressure vapor

400
If a gas furnace starts, runs for a few seconds, shuts down, and repeats this process, the problem is most likely
Defective flame sensor/rectification
400

This ancient culture used wet reeds hanging in windows to help cool homes.

Egyptians

500
The manifold pressure of a L.P. fired furnace
11" w.c.
500

What are the two main components found in heat pumps that are not found in gas/electric systems?

Defrost board and reversing valve.

500

What is the one thing we do in our tune up to ensure we have no call backs?

Cycle the system

500

What test do you use to check if you have a possible low voltage line break?

Continuity

500

What did the term "tonnage" refer to originally in HVAC?

Ice (How long to melt one ton of ice, etc)

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