Gases - Carbon Dioxide

Question 1

What is the Chemical symbol of Carbon Dioxide?

Answer 1

CO2

Question 2

What is the specific gravity of Carbon Dioxide?

Answer 2

1.52

Question 3

What is the characteristics of Carbon Dioxide?

Answer 3

Colourless,
Slight pungent odour,
Soda water taste

Question 4

Legal limits of Carbon Dioxide are?

Answer 4

LTEL (8hr) - 1.25%,

MEL 3%

Question 5

Effects of Carbon Dioxide on a person are?

Answer 5

High concentration of CO2 acts as a stimulant on the nervous system, particularly the respiratory control centre of the brain. A rapid increase in breathing commences after this. CO2 is approx. 20 times more soluble in the blood than oxygen & diffusion is rapid.

Question 6

Why is Carbon Dioxide known as a hot gas?

Answer 6

CO2 is also known as “hot gas” due to it’s insulating properties causing a feeling of warmth.

Question 7

Effects on a person

2%

Answer 7

Breathing deepens

Question 8

Effects on a person

4%

Answer 8

Markedly increased respiratory rate

Question 9

Effects on a person

4.5% - 5%

Answer 9

Breathing becomes laboured

Question 10

Effects on a person

10%

Answer 10

Visual disturbances,
tremors, perspiration,
increased blood pressure and
loss of consciousness

Question 11

Effects on a person

25%

Answer 11

Depression,
convulsions,
coma and
death

Question 12

Is Carbon Dioxide Combustible?

Answer 12

No
Incombustible in Air.
Wil not support combustion

Question 13

Is Carbon Dioxide Flammable?

Answer 13

No

Non-flammable

Question 14

Detection of Carbon Dioxide?

Answer 14

IR, GC, detector tubes

Question 15

Where is Carbon Dioxide found in a mine?

Answer 15

Seam gas, 
oxidation of coal, 
fires & some damps, 
diesel exhausts, 
inertising equipment, 
shot firing & 
respiration from humans