1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nataliya [291]
3 years ago
9

What refrigerant safety group classification has the highest flammability and the highest toxicity?

Biology
2 answers:
timama [110]3 years ago
3 0

Answer;

-B3

Explanation;

Refrigerants are divided into two groups according to toxicity:

-Class A signifies refrigerants for which toxicity has not been identified at concentrations less than or  equal to 400 ppm;  and

-Class B signifies refrigerants for which there is evidence of toxicity at concentrations below 400 ppm.

They are also divided into three groups according to flammability:

-Class 1 indicates refrigerants that do not show flame propagation when tested in air at 21°C and 101  kPa;

-Class 2 indicates refrigerants having a lower flammability limit of more than 0.10 kg/m3  at 21°C and  101 kPa and a heat of combustion of less than 19 kJ/kg;

-Class 3 indicates refrigerants that are highly flammable as defined by a lower flammability limit of less  than or equal to 0.10 kg/m3  at 21°C and 101 kPa or a heat of combustion greater than or equal to 19  kJ/kg.

-Therefore; the answer for the above question would be Class B and class 3.

Mashcka [7]3 years ago
3 0

Answer:

B3

Explanation:

In the classification of chemical refrigerants of the International Institute of Refrigeration, capital letters correspond to the toxicity level and numbers indicate the flammability level. Since toxicity is divided into categories A and B, and flammability into categories 1 to 3, the highest flammability and toxicity of a refrigerant is indicated by "B3".

You might be interested in
What is the difference between molecules and compounds?
Nataly [62]
A molecule is when two or more atoms join together chemically. A compound is a molecule that contains at least two different elements. 
6 0
3 years ago
At birth, what is the average number of red blood cells per<br> mm of blood?
umka2103 [35]
Baby girls are 4.1mm
Baby boys a 3mm
7 0
3 years ago
Read 2 more answers
primary succession is a pioneer species move into an area that has no plants.Which organisms are common pioneer species?
leva [86]

Answer: B - mosses and lichens that can grow on Rocky surfaces

Explanation: Primary succession usually starts or begins on rock outcrops. It could include bare surfaces, volcanic mountains or an area (water surfaces) with no soil.

In primary succession, pioneer organisms including algae, lichen, mosses and fungi usually are the pioneer species. Other abiotic factors like wind and water play roles of normalizing the habitat.

6 0
3 years ago
Read 2 more answers
State three items that are absorbed by the plant system ?
lawyer [7]
Water, sunlight, oxygen.
3 0
2 years ago
Which unit is more useful to measure in. Milliliters or liters and why?
AlladinOne [14]
Liters because liters are larger than milliliters.
6 0
3 years ago
Other questions:
  • On a microscope how is the slide held steady so that it does not move while you look at the object
    9·1 answer
  • How do scientists study current climate condititions?
    11·1 answer
  • What is a producer and a chemical reaction
    11·2 answers
  • What must occur in a population for it to grow?
    10·1 answer
  • Directions: Part 2 - Write your own skin scenario with FIVE or more sentences, using a completely different scenario than your 1
    9·1 answer
  • Which subatomic particle has a negative charge<br> Proton<br> Electron<br> Neutron<br> Atom
    15·1 answer
  • Is mucous an enzyme or harmone​
    12·1 answer
  • What is the valence of an atom with six electrons in its outer electron shell?
    11·1 answer
  • Biological change over time accounts for the diversity of species. This diversity
    8·1 answer
  • How can we slow down sea level rise
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!