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A microburst is

  • A.the sudden onset of hail from a storm
  • B.a small intense downdraught reaching the surface
  • C.a very brief but heavy shower of rain
  • D.a small tornado formed beneath a cumulonimbus

Answer: B

Evaporative cooling of precipitation drives air downward and it spreads violently on reaching the ground. The resulting wind shear is a recognised hazard to aircraft during take off and landing. Detection systems at major airports exist for this reason.

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