76) Cyclonic precipitation results from

• (a) lifting of air masses converging into low pressure area
• (b) natural rising of warmer, lighter air in colder and denser surroundings
• (c) lifting of warm moisture-laden air masses due to topographic barriers
• (d) all of the above

77) The precipitation caused by natural rising of warmer lighter air in colder and denser surroundings, is called

• (a) convective precipitation
• (b) orographic precipitation
• (c) cyclonic precipitation
• (d) none of the above

78) The precipitation caused by lifting of warm moisture laden air masses due to topographic barriers, is called

• (a) convective precipitation
• (b) orographic precipitation
• (c) cyclonic precipitation
• (d) none of the above

79) Identify the method that is not used for the computation of average rain fall in a catchment having n number of stations.

• (a) Arithmetic average method
• (b) Thiessen polygon method
• (c) Isohyetal method
• (d) Hyetograph method

80) The process of loosing water from the leaves of plants, is termed as

• (a) surface evaporation
• (b) water surface evaporation
• (c) transpiration
• (d) precipitation