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# Test: Abstractions From Precipitation - 1

## 10 Questions MCQ Test GATE Civil Engineering (CE) 2022 Mock Test Series | Test: Abstractions From Precipitation - 1

Description
This mock test of Test: Abstractions From Precipitation - 1 for Civil Engineering (CE) helps you for every Civil Engineering (CE) entrance exam. This contains 10 Multiple Choice Questions for Civil Engineering (CE) Test: Abstractions From Precipitation - 1 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Abstractions From Precipitation - 1 quiz give you a good mix of easy questions and tough questions. Civil Engineering (CE) students definitely take this Test: Abstractions From Precipitation - 1 exercise for a better result in the exam. You can find other Test: Abstractions From Precipitation - 1 extra questions, long questions & short questions for Civil Engineering (CE) on EduRev as well by searching above.
QUESTION: 1

### If ewand ea are the saturated vapour pressures of the water surface and air respectively, the Dalton’s law for evaporation EL in unit time is given by EL =

Solution:

The rate of evaporation is proportional to the difference between the saturation vapour pressure at the water temperature, ew and the actual vapour pressure in the air, ea . Thus,

where,EL = rate of evaporation (mm/day) C = a constant
ew and ea are in mm of mercury

QUESTION: 2

Solution:
QUESTION: 3

### A canal is 80 km long and has an average surface width of 15 m. If the evaporation measured in a class A pan is 0.5 cm/day, the volume of water evaporated in a month of 30 days is (in m3)  : -

Solution:

Volume of water evaporated in a day

Pan constant for class A pan = 0.7
∴ Volume of water evaporated in a month

QUESTION: 4

The ISI standard pan evaporimeter is

Solution:

An ISI standard pan evaporimeter has about 14% less evaporation than a US class A pan.

QUESTION: 5

The chemical that is found to be most suitable as water evaporation inhibitor is

Solution:
QUESTION: 6

Wind speed is measured with

Solution:
QUESTION: 7

Evapotranspiration is confined to

Solution:

Transpiration is essentially confined to day light hours and rate of transpiration depends upon the growth period of the plant. Evaporation on the other hand, continues all through the day and night although the rates are different.

QUESTION: 8

Interception losses

Solution:

A part of rain may be caught by vegetation and subsequently evaporated. The volume of water so caught is called interception. Interception loss is solely due to evaporation and does not include transpiration, through fall or stemflow.

QUESTION: 9

The rainfall on three successive 6-h periods are 1.3, 4.6 and 3.1 cm. If the initial loss is 0.7 cm and the surface runoff resulting from this storm is 3 cm, the φ-index for the storm is

Solution:

QUESTION: 10

If for a given basin in a given period, P - precipitation, E = evapotranspiration R = total runoff and ΔS - increase in the storage of water in the basin, the hydrological water budget equation states

Solution: