Question

Which of the following statements are correct?
1. A fine sprinkle of precipitation of small and rather uniform water drops with all drop diameters below 0.10 mm is called as drizzle.
2. The precipitation of liquid water with every drop diameter less than 0.5 mm is known as rain.
3. Precipitation in the form of balls or irregular lumps of ice each over 8 mm in diameter is called as hail.
4. Dew is formed directly by condensation on the ground mainly during night when the surface has been cooled by outgoing radiation.

• A. 1 and 2
• B. 2 and 3
• C. 3 and 4
• D. 1 and 4

Answer 1

The correct option is C 3 and 4

Rain : When water droplets are of size 0.5 mm to 6 mm then it is classified as rain.

Classification of rain as per intensity of rainfall is as shown below:-

$\begin{array}{cc}\text{Intensity (mm/hr)}& \text{Rain}\\ \text{< 2.5 mm/hr}& \text{Light}\\ \text{2.5 - 7.5 mm/hr}& \text{Moderate}\\ \text{> 7.5 mm/hr}& \text{Heavy}\end{array}$

Drizzle: Rain droplets of size less than 0.5 mm and rain intensity less than 1 mm/h.

Hail: It is a showery precipitation in the form of irregular pellets or lumps of ice of size more than 8 mm.

Dew: Water droplets condensed from the air, usually at night, onto cool surfaces near the ground. Dew forms when the temperature of the surface falls below the dew point of the surrounding air usually due to radiational cooling.