SAMRA 14-10

Questions and Answers

Where will the most severe CAT caused by the jet stream be?

Increasing wind speed by more than 5kt per 1000 ft vertically

Presence of 30kt isotach closer than 90 nm

Fluctuation in temperatures at altitude

Both A and B (correct)

What is the reason cold air masses create cumulonimbus clouds more effectively?

Cold fronts are steeper and advance quickly (correct)

Cold fronts advance slowly

They are less dense than warm air

They promote convection currents

Can civil aircraft use TACAN equipment for navigation?

Yes, but only in visual flight rules

Yes, according to the en route chart (correct)

No, they should use GPS only

No, it is only for military aircraft

What does a pressure level of 250mb approximately correspond to in altitude?

FL340 Signup and view all the answers

What challenge does a onboard weather radar face in detecting rain?

Difficult to detect due to radar energy attenuation Signup and view all the answers

Pressure level question:

Closer in cold air Signup and view all the answers

Refer to chart. How does microburst influence the performance of aircraft #3

Decrease A of A, decrease amount of lift Signup and view all the answers

Refer to chart. A cyclone creates a narrow, long cloud what kind of cloud is it? (Area B)

Jet stream cloud Signup and view all the answers

How should a blind passenger be briefed?

Must have an individual tactile briefing don’t need emergency brief Signup and view all the answers

What does the contour of the pressure level indicated on the map represent?

Surface Signup and view all the answers

Study Notes

Severe CAT and Jet Stream

Severe Clear Air Turbulence (CAT) occurs vertically when wind speed increases by over 5 knots per 1000 feet.
A significant indicator is if the 30-knot isotach on the upper chart is within 90 nautical miles.

Cumulus Formation and Cold Air Mass

Cumulus clouds are most likely to form in cold air masses due to the characteristics of cold fronts.
Cold fronts are steeper and advance more quickly, leading to optimal conditions for cloud formation.

Use of DME in Aircraft

Civil aircraft can utilize Distance Measuring Equipment (DME) for navigation purposes, referencing the en-route chart.

Pressure Levels

The altitude of 250 mb corresponds to Flight Level 340 (FL340), which is approximately 34,000 feet.

Pressure Level Characteristics

In colder air masses, pressure levels are typically closer to the ground, influencing weather patterns.

Weather Radar and Rain Detection

Detecting rain with onboard weather radar can be challenging due to radar energy interference, making identification difficult.

Description

Test your knowledge on how jet streams affect turbulence, the role of cold air masses in cloud formation, and the use of navigation equipment in aircraft. This quiz covers essential topics crucial for understanding aviation weather patterns and equipment usage.