Oxygen and Respiration: DGCA Air Regulations questions

Question 1

With an alveolar partial pressure of oxygen of 55 mm Hg, what is the maximum altitude to breathe 100% oxygen without pressure?

Accepted Answer

40000 ft.

Answer

33700 ft.

Answer

44000 ft.

Answer

10000 ft.

Question 2

What are the constituents of the atmosphere?

Accepted Answer

Oxygen 21%, Nitrogen 78%, Other gases 1%.

Answer

Oxygen 22%, Nitrogen 77%, Other gases 1%.

Answer

Oxygen 22%, Nitrogen 78%, Other gases 2%.

Answer

Oxygen 22%, Nitrogen 77%, Other gases 1%.

Question 3

What is the percentage of oxygen and carbon dioxide in the alveoli at sea level?

Accepted Answer

14.0% and 5.3% respectively.

Answer

15.5% and 6.6% respectively.

Answer

16.5% and 7.6% respectively.

Answer

21.0% and 0.5% respectively.

Question 4

On 100% oxygen at 40000 feet, what height in the atmosphere does the partial pressure of oxygen in the alveoli equate to?

Accepted Answer

The same as at 10000 ft.

Answer

The same as at 20000 ft.

Answer

The same as at 25000 ft.

Answer

The same as at 30000 ft.

Question 5

At what height is the partial pressure of oxygen in the lungs approximately half that at sea level?

Accepted Answer

10000 ft.

Answer

25000 ft.

Answer

30000 ft.

Answer

18000 ft.

21 more questions in this chapter, free with an account