Air Quality

1.

True or False: Carbon Monoxide (CO) is absorbed 200 times more by haemoglobin than oxygen is.

A. True

B. False

2.

Which statement is NOT correct?

A. Carbon dioxide (CO2) in excessive quantities increases the rate of breathing and in deeper diving causes respiratory risk

B. Excessive moisture can make regulators freeze or fail to open

C. Low levels of Carbon monoxide (CO) in the breathing gas can only result in mild CO intoxication

D. Especially smaller oil particles create health concerns as they will not be removed by the body's clearance mechanisms and can cause inflammation

3.

True or False: CO contamination usually arises from impurities in the air taken into the compressor or from contaminants generated by the compressor itself.

A. True

B. False

4.

When filling cylinders, the compressor’s air intake should:

A. Be placed upwind from the exhaust

B. Be placed upwind from any source of contamination

C. Be placed at least 15m away from the compressor itself

D. A&B

E. All of the above

5.

When using a compressor, you must:

A. Make sure the correct compressor oil and filters are used

B. Regularly check that the air intake hose is not damaged and couplings are not loose

C. Ensure proper maintenance of the compressor

D. Regular check the quality of the air

E. A&C

F. All of the above

6.

What can the diver do to reduce the risk of CO intoxication?

A. Only obtain air or breathing gas fills from a reputable dive centre, club or dive shop

B. Ask the air supplier how often they check the quality of their air and if they periodically perform compressor maintenance and have a compressor log

C. If possible, check the location of the air intake of the compressor

D. Avoid smoking immediately prior to the dive as cigarette smoke also contains CO

E. Check your air cylinder for the presence of CO using a personal CO detector device, especially if you have concerns about the quality of the air supplier or when you cannot determine how the dive cylinders where filled

F. All of the above

7.

Which of the following is NOT a sign or symptom of CO intoxication?

A. Headache and sensation of pressure inside the head

B. Vertigo

C. Nausea

D. Over-confidence and sense of well-being

E. Breathlessness with exertion

F. Confusión

G. All of the above are signs and symptoms of CO intoxication

8.

What should the diver do, when experiencing signs and symptoms of CO intoxication?

A. The diver should stop breathing from the contaminated cylinder and end the dive

B. The diver should ascent a few meters, while taking deep breaths

C. The diver should descent until signs and symptoms disappear

9.

True or False: in case of CO intoxication, 100% Oxygen should be administered as soon as possible.

A. True

B. False

10.

True or False: divers with a severe CO intoxication can benefit from treatment in a hyperbaric chamber.

A. True

B. False

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