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Match each delivery method with its usual application.
List I
A. Aircraft flare
B. Ground generator
C. Rocket or artillery
D. Ground propane dispenser
List II
1. rapid delivery into a developing hail storm
2. seeding directly in the supercooled cloud region
3. seeding a cap cloud on a mountain ridge
4. releasing agent into orographic upslope flow

  • A.A-4, B-2, C-1, D-3
  • B.A-2, B-4, C-3, D-1
  • C.A-3, B-1, C-4, D-2
  • D.A-2, B-4, C-1, D-3

Answer: D

Which method suits depends on how the agent must reach the supercooled region. Ground based release relies on the terrain flow carrying the agent up into the cloud. Without that lift the agent stays in the boundary layer.

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