36c M02quiz

ASHRAE standard 34 designates the most hazardous refrigerants as:

B3

Manufacturers often color code the exterior of gauges. On a typical manifold gauge set, the low pressure gauge is color coded:

Blue color

The molecule found in CFCs and HCFCs that depletes ozone is:

Chlorine

With a blended refrigerant, the difference between bubble point and dew point is called:

Temperature glide

A single chlorine atom can destroy how many ozone molecules?

100,000

ASHRAE standard 34 designates hydrocarbon refrigerants as;

200 series Refrigerant

ASHRAE standard 34 designates zeotrope refrigerant blends as

400 series Refrigerant

ASHRAE standard 34 designates azeotrope refrigerant blends as:

500 series Refrigerant

On the T-H Chart, zeotrope refrigerants have:

A slopped saturation line.

Which ASHRAE classification means slightly flammable?

AL2

Which of the following refrigerants do NOT contribute to global warming?

All contribute

Crop loss, eye disease, and skin cancer have been attributed to:

Depletion of Stratospheric ozone.

Refrigerant R-410A can be used in existing R-22 equipment as a retrofit refrigerant replacement. (true or false)

False

Which type of refrigerant contains no chlorine?

HFC refrigerants

HCFC refrigerants contain:

Hydrogen, Chlorine, Fluorine, and Carbon

On a two column temperature and pressure chart, bubble point;

Is used for calculating subcooling

What is the ozone layer and why is it important to us on Earth?

Protective shield for Earth from the sun's harmful ultraviolent (UV) rays in the stratosphere layer that extends about 6 to 30 miles above earth.

Which refrigerant is a CFC?

R-12

Which of the following refrigerant has a GWP closest to "1"?

R-1233zd

Which refrigerant is an HFC?

R-134a

Which refrigerant has the lowest ODP?

R-22

Which refrigerant is an HCFC?

R-22

A technician must take special precautions when using POE oils because:

They absorb moisture from the atmosphere more easily than mineral oil.

An ozone molecule contains

Three oxygen atoms

The chlorine in CFCs and HCFC refrigerants:

Will not dissolve in water