water management Mcqs
151. The difference between saturation vapour pressure and actual vapour pressure at a constant temperature is called ___________________?
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A. Saturation vapour pressure

B. Partial pressure

C. Actual vapour pressure

D. Saturation deficit
152. The discharge of a well per unit draw down usually expressed as gallons or liters per minute is called ____________________?
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A. Discharge

B. All are correct

C. Specific capacity

D. Specific volume

153. The property of soil which indicates the volume of water stored in the formation is called ___________________?
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A. Specific yield

B. Porosity

C. Field capacity

D. Specific retention

154. The lower limit of factor of safety against over turning in a gravity is _______________________?
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A. 1.3

B. 1.5

C. 1.4

D. 1.6

155. It is important to keep the saturation gradient line within the body of a embankment of canal, the saturation gradient line in loomy soils lie at___________________?
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A. 1:2 to 1:4

B. 1:3 to 1:5

C. 1:4 to 1:6

D. 1:5 to 1:7

156. A regulator is water controlling structure, it is provided at the head of canal to supply water from parent canal to the branch channel is called_______________________?
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A. All are correct

B. Escape

C. Cross-Regulator

D. Head Regulator
157. The soil which are formed due to the weathering effects particularly by movement of water and are high permeable are called _________________?
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A. Alluvial soils

B. Non-alluvial soils

C. Semi-impervious soils

D. Impervious soils

158. Estimated quantity of global water is __________which covers about 70% of earth?
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A. 1.33x109km3

B. 1.35x109km3

C. 1.32x109km3

D. 1.30x109km3

159. A structure made near weirs and barrages to facilitate the migration of fish up stream or down stream is called __________________?
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A. Fish pond

B. Fish pool

C. Fish ladder

D. Fish escape

160. In the initial stage of rainfall, when soil moisture available in the root zone is very low, the rate of infiltration ?
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A. Normal

B. Increases

C. Reduces

D. remain stagnant

161. Infiltration capacity curve is the graphical representation, as to how the infiltration capacity varies with time after rainfall this curve was represented by ____________________?
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A. Lacy

B. Darcy

C. Horton

D. Kennedy

162. A spoil bank is formed when the volume of excavated soil is _________________ of embankment filling?
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A. Not required

B. Excess

C. Equal to

D. Less than

163. A curve showing the maximum flow in the river and mean time reduces flow. we be called___________________?
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A. Infiltration capacity curve

B. All are correct

C. Ground water depletion curve

D. Infiltration capacity

164. A particular flood which can occur in the basin in the worst meteorological and hydrological conditions is called ___________________?
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A. Maximum probable flood

B. Very high flood

C. Storm water flood

D. Standard flood

165. The amount of moisture content present in the air, when it is expressed as weight per unit volume is called ________________?
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A. Absolute Humidity

B. All are correct

C. relative humidity

D. Humidity

166. In high floods, to avoid spilling of flood water over the gates, a wall is provided from pond level to high Flood level. This wall spans for the entire length of regulator, rest on piers, sustain water pressure by its weight called_____________________?
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A. Retaining wall

B. Divide wall

C. Breast wall

D. Cantilever wall

167. The hydraulic structures like dams, barrages constructed on permeable foundations are likely to fail due to ___________________?
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A. Piping

B. All the above

C. Crushing

D. Sliding

168. If the weir flood is designed continuous with divide piers as reinforced structure,such that the weight of divide piers, keep the structure safe against uplift, is called__________________?
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A. Rectangular weir

B. Non-gravity weir

C. Gravity weir

D. Sharp crested weir

169. A fish ladder is device by which flow energy can be dissipated in such a manner as to provide easy access to the downstream fish to come on upstream side, the velocity of flow varies from___________________?
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A. 3.5 4.0 m/sec

B. 2.5 3 m/sec

C. 2.0 2.5 m/sec

D. 3.0 3.5 m/sec
170. The flow in the river due to the floods may be classified as _____________________?
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A. Irrotational flow

B. Laminar flow

C. Stream line flow

D. Turbulent flow
171. The down stream sloping glacis of the Hydraulic structure is made in such a way to form automatically the _____________ and dissipate the surplus energy of flowing water?
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A. Afflux

B. Pond level

C. HFL

D. Hydraulic jump
172. When high flood passing down weir creating high up lift pressures and there is no flow in the canals, if such condition is taken for design and is called__________________?
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A. Dangerous condition

B. Worst condition

C. Hydraulic design condition

D. High flood level

173. The significant damage to crop generally occurs when capillary meniscus reaches permanent wilting point known as _______________?
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A. Unavailable moisture

B. Equivalent moisture

C. Hygroscopic moisture

D. A and B
174. Hydraulic structures are designed for a safe flow of flood. The floods which are equal in designed magnitude life of the project is called _____________________?
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A. Probable flood

B. Low floods

C. High floods

D. Ordinary floods

175. The percentage of culturable commended area, irrigated during the year to the total culturable commanded area on a outlet or channel is called___________________?
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A. Culturable Commended area

B. Annual Intensity

C. Gross commended area

D. Total irrigable Area

176. According to Mr. Khosla, the seeping water creates undermining and the undermining starts from__________________?
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A. Bottom to top

B. Up stream to down stream

C. Down stream to up stream

D. Top to bottom

177. In ogee spillway the discharge is directly proportional to _______________________?
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A. H1/4

B. H3/2

C. H1/2

D. H1/3

178. The discharge through rectangular channel is maximum when Hydraulic mean depth m is equal to ______________?
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A. depth/ 4

B. depth/ 3

C. 2 / 3 depth

D. depth/ 2
179. The delta the total water depth required by a crop up to its maturity the delta of wheat is _____________________?
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A. 50cm

B. 30cm

C. 40 cm

D. 60cm

180. After rainfall the quantity of water that flows directly over the ground surface and join immediately to the river is called_________________?
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A. Sub-surface runoff

B. Base flow

C. True surface runoff

D. Surface runoff

181. The under sluices in a weir are provided, at the level of upstream floor dispose off the sediment deposited on downstream is called______________________?
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A. Sluice gates

B. Under sluices

C. Head sluices

D. Scouring sluices
182. the ratio between the rate of change of discharge of the out let to the rate of change of discharge of the distributary is called ______________________?
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A. flexibility

B. Flow abili

C. Proportionally

D. Sensitivity

183. The inverted filter consists layer of materials of increasing ______________ from bottom to top?
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A. Piping

B. Up thrust pressure

C. Permeability

D. Under mining

184. When the fluid properties do not change with time, it is a ___________ flow?
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A. Non-Uniform

B. Unsteady

C. Uniform

D. Steady
185. If in a river the flood rises and falls suddenly due to storm rain, then such river is called __________________?
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A. Virgin

B. Flashy

C. Deltaic

D. Tidal

186. During the peak stage of river, there exist an out flow from river into the ground water reservoir, in such case river will be called _________________?
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A. Influent stream

B. Seepage stream

C. Storm water stream

D. Effluent stream
187. The depth of water in a channel, corresponding to minimum specific energy is called ________________?
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A. Critical depth

B. None of these

C. Normal depth

D. Full supply depth

188. The groyne pointing upwards direction of flow is called ______________________?
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A. Repelling

B. Attracting

C. Permeable

D. Impermeable

189. A reference point on the ground of accurately known position which is a () point of leveling is called ________________?
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A. Control point

B. Reference point

C. Check point

D. Fixed point

190. A unit hydrograph is a hydrograph of runoff produced by a rainstorm of a specified duration called ____________________?
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A. Storm runoff

B. Unit duration

C. Base flow

D. Peak runoff

191. A fixed reference point from which the discharge of flowing water is measured is________________?
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A. Bench mark

B. Reduce level

C. Reference point

D. Contour point

192. The loss of head due to friction according to Darcys formula is _____________________?
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A. 4fLv2/gd

B. 4fLv/gd

C. 4fLv/2gd

D. 4fLv2/2gd
193. Pilot tube is a device, which convert velocity head of flowing water into pressure by ____________________?
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A. H = v2/2g

B. H = v2 / g

C. H = v2 / g2

D. H = v/g

194. Art of making saline water fit for irrigation and drinking through the processes of membrane technique and reverse osmosis is called ___________________?
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A. Water mixing

B. All are correct

C. Water application

D. Desalinization
195. For a flood control reservoirs, the effective storage is equal to ___________________?
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A. Useful storage + surcharge storage

B. Useful storage + surcharge storage

C. Useful storage + surcharge storage -valley storage

D. Useful storage valley storage

196. The water force per meter length on a vertical wall is equal to_________________?
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A. wh2

B. WH2 2

C. W.H/2

D. w H

197. A cloud is formed due to condensation. it consists of a small particle of ice an. small droplets of water, having diameter about ___________microns?
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A. 30

B. 40

C. 45

D. 35

198. The total length of impervious floor on down stream of the hydraulic structure is determined by Blighs Theory__________________?
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A. Darcy

B. Lane

C. All are correct

D. Khosla
199. According to Khoslas theory of seepage, the Exit gradient depends upon ____________________?
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A. depth /width ratio

B. width /depth ratio

C. depth /Length ratio

D. Length /depth ratio

200. How much annual rain fall is in sargodha?
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A. 400 mm

B. 550 mm

C. 500 mm

D. 450 mm