Gas Exposure Symptoms

Question 1

Name 4 signs or symptoms of exposure to Nitrogen Dioxide.

Answer 1

1. Feeling ill
2. Coughing violently
3. Symptoms of bronchitis and pneumonia
4. Death

Question 2

Explain the effect of the following Carbon Dioxide CO2 concentrations on a person:
2%
4.5%~5%
10%

Answer 2

a) 2%- 50% increase in lung ventilation
b) 4.5-5%- Anxiety, panic, irritability
c) 10%- Toxic, depresses CNS, violent panting, exhaustion, headache

Question 3

Carbon dioxide CO2 is regarded as a hot gas due to its low thermal conductivity, explain:

Answer 3

Due to its insulating properties it gives a feeling of warmth

Question 4

Describe the physiological effects of Carbon Dioxide CO2 at high and low concentrations:

Answer 4

Low Stimulates the CNS/ 50% increase in lung ventilation

High-depresses the CNS/ Respiratory failure

Question 5

How is the body poisoned by Carbon Monoxide CO

Answer 5

Carbon Monoxide CO is absorbed 300 times more readily than oxygen and prevents O2 from binding to the red blood cells

Question 6

In regards to Carbon Monoxide CO what is meant by the term blood saturation

Answer 6

Blood becomes saturated with Carbon Monoxide CO preventing the blood from taking on any more Oxygen O2 or Carbon Monoxide CO

Question 7

Carbon Monoxide CO is said to have a cumulative effect What is meant by cumulative effect

Answer 7

Carbon Monoxide CO can build up in a person from multiple small exposures to Carbon Monoxide CO making the person more susceptible to it’s effect

Question 8

Name 6 signs and symptoms of Carbon Monoxide CO poisoning

Answer 8

Impairment of visual threshold /unsteady gait /becoming silent /rosy flushed face /heavy feeling in legs /headache /nausea

Question 9

What concentration of Hydrogen Sulphide H2s causes dizziness,excitement,nausea,dryness and pain in the nose/ throat/chest and irritation of the mucous membranes ?

Answer 9

250 ppm to 600 ppm

Question 10

State the physiological effects of Hydrogen Sulphide H2s on a person

Answer 10

Irritates the lungs and respiratory tract/has a narcotic effect on the central nervous system

Question 11

State the physiological effects of Sulphur Dioxide SO2 has on a person

Answer 11

Poisonous gas irritating the respiratory passages

Question 12

State the physiological effects of Nitrogen Dioxide NO2

Answer 12

Irritates the respiratory passages/coughing

Question 13

Oxygen percentages:Explain the effects
16%~14%
14%~10%
10%~6%

Answer 13

16~14% - Slight increase in pulse and breathing/night and colour vision affected
14%~10% - Poor judgment/abnormal fatigue
10%~6% - Nausea/vomiting