DADE DADE Weather & Meteorology 2 — Questions and Answers
Question 1: What is the definition of a thunderstorm's squall line as relevant to dispatch planning?
- A single isolated thunderstorm cell
- A narrow band of active thunderstorms along or ahead of a cold front (Correct answer)
- A line of dissipating storm cells
- A stationary thunderstorm over a mountain range
Correct answer: A narrow band of active thunderstorms along or ahead of a cold front
A squall line is a narrow band of active thunderstorms that typically forms ahead of or along a cold front and requires routing around for dispatch.
Question 2: What does a negative temperature deviation from ISA indicate for aircraft performance planning?
- Improved engine performance and shorter takeoff distances (Correct answer)
- Reduced engine performance and longer takeoff distances
- No effect on aircraft performance
- Increased fuel consumption only
Correct answer: Improved engine performance and shorter takeoff distances
When outside air temperature is colder than ISA standard, air density is higher, which improves engine performance and shortens takeoff distances.
Question 3: Which meteorological condition creates the most significant density altitude concern for dispatch at high-elevation airports?
- Low humidity and cold temperatures
- High temperatures combined with high humidity and high elevation (Correct answer)
- High barometric pressure with moderate temperatures
- Strong surface winds from the north
Correct answer: High temperatures combined with high humidity and high elevation
High temperature combined with high humidity and high elevation elevation significantly reduces air density, creating high density altitude and degraded aircraft performance.
Question 4: What is the significance of a PIREP reporting moderate rime icing at a specific altitude for dispatch?
- It can be disregarded for jet transport aircraft
- It provides real-time icing conditions useful for route planning and altitude selection (Correct answer)
- It only applies to propeller-driven aircraft
- It indicates conditions have improved since the report
Correct answer: It provides real-time icing conditions useful for route planning and altitude selection
PIREPs reporting icing provide actual in-flight conditions that help dispatchers and pilots select altitudes and routes to avoid hazardous icing.
Question 5: What ceiling and visibility values define visual meteorological conditions (VMC) in the US?
- Ceiling at or above 1,000 feet and visibility 3 miles or greater
- Ceiling at or above 3,000 feet and visibility 5 miles or greater (Correct answer)
- Ceiling at or above 500 feet and visibility 1 mile or greater
- Any ceiling with visibility above 10 miles
Correct answer: Ceiling at or above 3,000 feet and visibility 5 miles or greater
Basic VMC requires a ceiling at or above 3,000 feet AGL and visibility of 5 miles or greater for most controlled airspace operations.
Question 6: How should a dispatcher account for headwinds when filing an IFR flight plan fuel load?
- Headwinds reduce fuel consumption so less fuel is needed
- Headwinds increase flight time and fuel consumption requiring additional fuel (Correct answer)
- Headwinds only affect altitude selection, not fuel
- Average wind conditions are used regardless of forecast winds
Correct answer: Headwinds increase flight time and fuel consumption requiring additional fuel
Headwinds reduce groundspeed, increasing flight time and fuel burn, so dispatchers must add extra fuel when significant headwinds are forecast.
DADE DADE Weather & Meteorology 2
What is the definition of a thunderstorm's squall line as relevant to dispatch planning?