Which of the following statements with reference to Sleet is/are correct? 1. Sleet is frozen raindrops and refrozen melted snow-water 2. It occurs when a layer of air with the temperature below freezing point overlies a warm layer near the ground surface Select the answer using the code given below:
- A.1 only
- B.2 only
- C.Both 1 and 2
- D.Neither 1 nor 2
Correct answer
Explanation
The correct answer is A, 1 only. Only statement 1 is correct; statement 2 has the two layers the wrong way round.
Sleet is precipitation in the form of frozen raindrops and refrozen melted snow-water. It forms when a layer of air with a temperature above freezing point lies over a subfreezing layer near the ground. Snowflakes melt into raindrops while falling through the warm upper layer, and then freeze again into small ice pellets as they pass through the cold layer near the surface. If the cold layer were on top and the warm layer below, any ice would melt before landing and fall as rain.
B is wrong because statement 2 reverses the layers: the warm layer is above and the freezing layer is near the ground.
C is wrong because statement 2 is incorrect.
D is wrong because statement 1 correctly describes sleet.
Exam tip: sleet = warm air above, freezing air near the ground; hail = ice balls built up in tall cumulonimbus clouds.
Practice Questions
View allWhich one of the following is applicable to collision-coalescence process of precipitation?
- A.Clouds which do not extend beyond the freezing level
- B.Clouds which extend beyond the freezing level
- C.All types of clouds
- D.Cirrocumulus cloud
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Collision-coalescence is the way rain forms in warm clouds, whose tops stay below the level where water freezes. In such clouds all droplets are liquid.
Read the full explanation →Identify the type of drainage pattern on the basis of the given characteristics :
1. It represents the most common pattern of streams and their tributaries
2. It occurs in areas of uniform rock type and regular slope
3. A map, or aerial photograph, shows a pattern like the veins on a leaf— smaller streams join the main stream at an acute angle
Select the correct answer.
- A.Dendritic
- B.Radial
- C.Trellis
- D.Centripetal
Show answer
A pattern that looks like the branches of a tree or the veins of a leaf, formed on uniform rock with a regular slope, is dendritic.
Read the full explanation →The Research Design and Standards Organization is the R&D wing of which one of the following organizations ?
- A.Bhabha Atomic Research Centre
- B.Indian Space Research Organization
- C.Indian Railways
- D.Defence Research and Development Organization
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The Research Design and Standards Organisation (RDSO) is the sole research and development wing of the Ministry of Railways. RDSO is headquartered at Lucknow.
Read the full explanation →Which one of the following Indian States has recorded negative growth population as per Census 2011?
- A.Manipur
- B.Mizoram
- C.Tripura
- D.Nagaland
Show answer
Nagaland was the only Indian state whose population fell between 2001 and 2011; its decadal growth rate in Census 2011 was about −0.6 per cent.
Read the full explanation →Piecing together the puzzle of geologic time to create and analyze historical maps of the Earth is known as
- A.paleoclimatology
- B.paleogeomorphology
- C.paleolithology
- D.paleogeography
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Paleogeography is the study of the Earth's geography in the geological past, and its main product is a set of maps showing where continents, oceans, mountains and shorelines lay at different times.
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