1. Which of the following statement(s) is/ are correct?

(i) Normal ratio method is used for estimating missing annual precipitation value at a station when the annual precipitation and normal annual precipitation at neighboring stations are known
(ii) Arithmetic average method of calculating the average precipitation is superior to Thiessen- Polygon method
(iii) Isohyetal method of calculating average rainfall is superior to arithmetic average method and Thiessen-Polygon method

[A] (i) and (ii)

[B] (i) and (iii)

[C] (ii) and (iii)

[D] (i), (ii) and (iii)

Answer: Option B


2. Depth- Area- Duration curves of precipitation are drawn as ____.

[A] Minimizing envelopes through the appropriate data points

[B] Maximizing envelopes through the appropriate data points

[C] Best fit curves through the appropriate data points

[D] Best fit mean straight lines through the appropriate data points

Answer: Option B


3. Evaporation is determined experimentally using ____.

[A] An open pan

[B] A neutron probe

[C] A lysimeter

[D] An infiltrometer

Answer: Option A


4. The salinity in water

[A] Does not affect evaporation

[B] Reduces the evaporation

[C] Increases the evaporation

[D] None of the above

Answer: Option B


5. Which of the following chemical is suitable to be used as a water evaporation inhibitor?

[A] butyl alcohol

[B] cetyl alcohol

[C] methyl alcohol

[D] ethyl alcohol

Answer: Option B




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