Mountain Operations

Question 1

There are 3 types of physiological effects that can be caused by flying in mountainous terrain:

Answer 1

1. Hypoxia
2. Visual Illusions
3. Decompression Sickness

Question 2

The visual illusions that might be experienced are as follows:

Answer 2

1. No Horizon – Too high above valley floor
2. False Horizon – Caused by sloping terrain
3. Vertigo
4. Pinnacle Illusion

Question 3

Helicopter aircrews may operate between __________ ft MSL and __________ ft MSL for up to 30 min without supplemental oxygen.

Answer 3

12,500; 14,000

Question 4

The 3 wind types that are used throughout the aviation community based on the Beaufort Scale are as follows:

Answer 4

1. Light winds
2. Moderate winds
3. Strong winds

Question 5

Winds 11–20 kts are identified as __________.

Answer 5

moderate winds

Question 6

Winds above 20 kts are identified as __________.

Answer 6

strong winds

Question 7

As density altitude increases, power available __________ while power required __________.

Answer 7

decreases; increases

Question 8

For every 1°C increase in OAT, DA increases by __________ ft.

Answer 8

120

Question 9

A __________ approach angle is recommended to a pinnacle or ridgeline at high density altitude with light or no winds.

Answer 9

normal

Question 10

A __________ quartering headwind is preferred as it requires less power than a __________ quartering headwind.

Answer 10

left; right