MET - Turbulence

What can be determined from the observation of the existence of lenticular clouds?

• There may be mountain waves present and there will be severe turbulence.

• There are mountain waves present but they may not give severe turbulence.

• A Fohn wind can be expected with no turbulence.

• A Katabatic wind is present which may lead to fog in the valleys

Mountain waves can occur ...

• Up to a maximum of 5000 ft above the mountains and 50 nm to 100 nm downwind

• Up to mountain height only and 50 nm to 100 nm downwind.

• Above the mountain and downwind up to a maximum height at the tropopause and 50 nm to 100 nm downwind

• In the stratosphere

What intensity of turbulence should be reported if crew and passengers feel a definite strain against their seat or shoulder straps, food service and walking is difficult and loose objects become dislodged?

• Light

• Extreme

• Severe

• Moderate

Refer to the image.

What is the most likely wind strength in square A3?

• 35kt

• 50kt

• 25kt

• light

Refer to the image.

Where is the most violent/extreme turbulence occurring?

• in square A2

• in square B1

• in squares A4, B4 and C4

• in squares B2, B3, B4 and in Squares C2, C3 and C4

Updrafts and downdrafts are the same as turbulence. True or false?

• True

• False

What are the types of turbulence?

Select all that apply

• Wake

• Mechanical

• Thermal

• Geographical

• Biological

IAS can fluctuate _____kts within moderate turbulence.

• 5-15

• 15-25

• 25-30

• 30-45

IAS can fluctuate _____kts within light turbulence.

• 5-15

• 15-25

• 25-30

• 30-45

Which of the following is probably the most dangerous practice, when flying in IMC in a region close to a range of hills 2000 ft high AMSL, in stable air and with wind direction at right angles to the axis of the range of hills?

• Flying towards the hills, into the wind, at altitude 6500 ft AMSL

• Flying parallel to the hills on the downwind side at altitude 4000 ft AMSL

• Flying towards the hills downwind at altitude 5500 ft AMSL

• Flying parallel to the hills in the upwind side at altitude 4000 ft AMSL