High Side
Low Side
Refrigerant
Pressures-Temp
"Right On"
100

Is the high side the big or little copper tube?

Little

100

In cooling mode is the vapor line hot or cold?

cold

100

It is ok to release R454B into the air. T or F

F

100

Why do we need a low side?

So the heat in the air will move to the cooler refrigerant.

100

What do you pull a vacuum down to?

500 microns

200

What state is the refrigerant in when it leaves the condenser goin to the evap?

High Pressure/Temp Liquid

200

which hose is used to measure the low side pressure?

blue hose

200

how full can we fill a recovery cylinder?

80%

200

Is atmospheric pressure is the same at sea level compared to 5000 ft elevation? T 0r F

F

200

What should your evap temp be?

20 to 30 cooler than indoor temp. 

300

What device is in the high side that stores extra liquid refrigerant?

Receiver 

300

Why do we charge in the low side?

suction side will suck in the refrigerant

300

Is R410 a blend or a pure refrigerant?

blend

300

What is the temp called located inside the coils?

Saturation

300

What is Delta T?

difference in return and supply temp

400

The compressor has two copper tubes, what are they referred to as?

True Suction and discharge line

400

What is an accumulator?

catches liquid refrigerant before the compressor

400

What is the classification of R454B? 

A2L

400

What is CTOA mean?

Condensing temp over ambient 

400

What is one way to measure CFM in a unit with strip heat?

Temp Rise Method

500

Explain subcooling?

Great Job!

500

How does a TXV work?

sensing bulb pressure rises and falls due to temp of vapor leaving the evap. 

500

What are the three types of Classifications for refrigeration. They are also the categories for leak rate calculations.

Comfort Cooling

Commercial Refrigeration

IPR

500

What is the inside of the pressure gauge that allows the needle to move?

Bourdon tube

500

What is the definition of refrigeration? 

removing heat from a space or substance and transferring it to another location,