Question

Which rainfall is also known as the relief rainfall?
A. Convectional rainfall
B. Frontal rainfall
C. Orographic rainfall
D. Cyclonic rainfall

Answer 1

Hint: We will describe precipitation and types of rainfall.Deposition of moisture from the atmosphere on the earth's surface is called precipitation. One of the forms of precipitation is rainfall. The three types of cooling of air produce three different types of rainfall known as Convectional Rainfall, Orographic Rainfall and Cyclonic Rainfall.

Complete answer:
 Relief Rainfall occurs from the cooling of warm moist air which ascends above the mountain-barrier lying in the direction of the prevailing winds. The presence of mountains causes humid air to rise. The sudden ascent causes cooling of air, leading to condensation and precipitation. Since it is caused by the relief of the land, it is called relief rain. On descending the leeward slope, a decrease in altitude increases both the pressure and the temperature, leading the air to get compressed and warm. Consequently, the relative humidity drops and there is evaporation and little no precipitation in the rain shadow area.
 For example, the monsoon winds, while ascending the Western Ghats cause heavy rainfall on the windward side. In the North East, the Himalayan barrier causes the winds to shed their moisture on the windward side on the slopes facing south.

Hence, the correct answer is option (C).

Note:In the North East, the Himalayan barrier causes the winds to shed their moisture on the windward side on the slopes facing south.Similarly, other regions receiving orographic rainfall include Eastern Brazil, East China, South Eastern United States. Orographic rainfall is especially heavy in the hot and humid areas bounded by tropical oceans.