NDA 2019 General Knowledge question

Which one of the following is NOT true in reference to Air mass ?

(A)Air mass forms either in tropical or in polar region
(B)Air mass develops on continents as well as over ocean
(C)Air mass develops in a cyclonic conditionCorrect
(D)Air mass changes the weather conditions

Answer: (C)

Solution

An air mass forms when air stays for a long time over a large uniform surface, which requires calm, stable, anticyclonic (high-pressure) conditions, not cyclonic ones.

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Question ID VK-031307