Recovery
Refrigerants
Pressure
Parts
DON'T DIE
100

What color are recovery cylinders

Grey bottom- yellow tops

100

A thermometer is said to "sense" 

What is,  sensible heat

100

Pressure is measured in 

Pressure  per square inch

100

Two locations where a cold air return should be installed:  

Open area of wall and high on the wall.

100

How hot should the water be to warm a cylinder

 not to exceed 125 degrees

200

How full can refrigerant containers be  

What is 80%

200

The latent heat used in changing liquid to a solid is called the latent heat of ----

What is, fusion

200

Vaporization can be increased by -------the pressure on a liquid

What is reducing

200

In an air conditioning and refrigeration system, what occurs in an evaporator

The refrigerant absorbs the latent heat.

200

T or F: You can heat a cylinder with an open flame

FALSE

300

When getting the ready to recover refrigerant it is important to-----

Identify the refrigerant

300

The heat used to change a liquid to a gas or vapor is called

What is vaporization

300

Every mechanical refrigeration system has __________ different pressure levels.

What is 2

300

In an air conditioning and refrigeration system, what occurs in an evaporator?

The refrigerant absorbs the latent heat.

300

T or F:High and low voltage can be lethal

TRUE

400

One should always or never mix refrigerants in recovery cylinders 

What is never!

400

Zero gauge pressure corresponds on the absolute scale to 

14.7

400

Atmospheric pressure, at sea level is

14.7 PSIA

400

Which of the following is not a type of compressor

a. Lateral b. Reciprocating c. Rotary d. Screw. Centrifugal . Lateral b.


What is lateral

400

Glasses do not have to be worn when working with refrigerant, just gloves 

False

500

Before the refrigerant enters the recovery machine, it should pass through

What is the filter dryer(pre filter)

500

The ton of refrigeration is equal to 

12,000 BTU per hour

500

Pressure on the high pressure side of a mechanical refrigeration unit is called _______________.

What is discharge or head pressure

500

In a sealed system, pressure and temperature have what relationship

D. Follow each other up and down

500

T or F: You must use a regulator on nitrogen cylinders

TRUE

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