Engineering hydrology is the science of water resource engineering which deals with the study of occurrence, distribution, movement and the properties of water on the earth or beneath the earth surface or in the atmosphere.

Water resources engineers develop and execute plans for developing water systems that provide clean, safe water in an efficient way that is also good for the planet. They play a central role in civil and commercial construction projects that involve water distribution.

Civil Engineering Practice Test: Hydrology and Water Resources Engineering

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25 Questions

1. Isohyets are the imaginary lines joining the points of equal

PressureHeightHumidityRainfall

2. The shape of recession limb of a hydrograph depends upon

Basin characteristics onlyBoth of theseNone of theseStorm characteristics only

3. Pick up the correct statement from the following:

If water goes out of channel to meet ground water, the channel is said to be influent streamIf ground water enters the channel, the channel is known as effluent channelAll of theseIf the water table is at higher level than the water level in channel, ground water flows to the stream

4. Sharp crested weirs are generally used

For large flowsFor streams carrying high sediment loadsFor small flowsFor rivers carrying floating debris

5. Select the incorrect statement.

All of theseLift irrigation increases water loggingExtensive irrigation should be adopted in areas susceptible to water loggingIntensive irrigation should be avoided in areas susceptible to water logging

6. Evaporation losses depend upon

Area of the water surface and depth of the waterNature of precipitation and type of vegetationAll of theseHumidity and wind velocity

7. To determine the discharge at a section in a stream from its rating curve, the required data are (i) Slope of water surface at the section (ii) Stage at the section (ii) Current meter readings at the section
The correct answer is

Only (iii)(i) and (ii)(ii) and (iii)Only (ii)

8. Pressure exerted by fully saturated air, is known

Saturation pressurePartial pressureSaturation pressure / Saturation vapour pressureSaturation vapour pressure

9. A hydroelectric scheme operating under a head of 80 m will be classified as

Medium head schemeNone of theseHigh head schemeLow head scheme

10. Which of the following is a flexible outlet?

Kennedy's gauge outletNone of theseSubmerged pipe outletGibb's outlet

11. If y is the depth of water at any section, then the mean velocity is

0.2 y0.3 y0.1 y0.6 y

12. Select the correct statement.

A meander increases the river length but a cut off reduces the river lengthBoth meander and cut-off decrease the river lengthBoth meander and cut-off increase the river lengthA cut-off increases the river length but a meander reduces the river length

13. If S is the potential infiltration, P is rainfall in cm in a drainage of a soil with fair pasture cover, the direct run off Q in cm is given by

Q = (P - 0.2 S)²/(P + 0.8 S)Q = (P - 0.2 S)²/(P + 0.6 S)Q = (P - 0.1 S)²/(P + 0.4 S)Q = (P - 0.2 S)²/(P + 0.2 S)

14. From the data of the rain storm shown in the below figure, the value of Windex is

3 cm/hour1.5 cm/hour2 cm/hour2.5 cm/hour

15. The uplift pressure on the face of a drainage gallery in a dam is taken as

Average of hydrostatic pressure at toe and heelTwo-third of hydrostatic pressure at toe plus one-third of hydrostatic pressure at heelNone of theseHydrostatic pressure at toe

16. A hyetograph is a graphical representation of

Cumulative rainfall and timeRainfall depth and timeDischarge and timeRainfall intensity and time

17. As compared to gravity dams, earthen dams

Require less skilled labourAre less susceptible to failureRequire sound rock foundationsAre costlier

18. Precipitation caused due to striking of air masses with a topographical feature, is called

Orographic precipitationCyclonic precipitationNone of theseConvective precipitation

19. Absolute humidity in air

Decreases at higher altitudesIncreases at higher altitudesRemains constant at all altitudesNone of these

20. If the axial length of a drainage basin is 35 km and its form factor is 0.2, the total area of the basin is

225 sq. km.215 sq. km.245 sq. km.205 sq. km.

21. Pick up the correct statement from the following:

All of theseThe number of unit hydrographs for a given basin, is theoretically infiniteThe rain during specified duration, is called unit stormThe specified duration of unit hydrograph, is called unit duration

22. The polythene bottles are used for collecting rain water and. their capacities is

4 litresAll of these10 litres2 litres

23. With the usual meanings of letters, the equation V = 400 I (D10²/4) is used for determining the velocity of ground water flow in metres per day. It is known as

Meinzer's formulaHazen's formulaDarcy's formulaSlichter's formula

24. The elevation Z of the watershed is: (where letters carry their usual meanings)

Obtained by the formula Z = + + + anzn)/AAverage elevation of the highest and lowest point of the drainage basinReduced level of the lower most point of the basinReduced level of the top most point of the basin

25. The initial basin recharge is equal to

Rain absorbed by the moisture deficiencyDepression storageInterceptionAll of these