water management Mcqs
101. The quantity of water lost by transpiration from the plants or crops and evaporation from fields adjacent to these plants is called ___________________?
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A. Evapo-transpiration

B. Consumptive use

C. a & b are correct

D. Un-confined water

102. Net irrigation + field irrigation losses are the requirement of _____________________?
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A. Full irrigation

B. Furrow irrigation

C. Field irrigation

D. Basin irrigation

103. When the weight of weir balances the up lift pressure caused by the head of the water seeping below the weir bed is called ___________________?
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A. Non-gravity weir

B. Gravity weir

C. Broad crested weir

D. Cippollite weir

104. To keep the Hydraulic structure safe against undermining the ________________ should be safe?
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A. Creep length

B. Hydraulic gradient

C. Exit gradient

D. Critical exit gradient

105. An impermeable Formation which neither contains water nor transmits water may be called_____________________?
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A. Confined-aquifer

B. Aquifuge

C. Aquiclude

D. Aquifer

106. That point in a body at which it will balance if loaded or supported is called ____________________?
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A. Centre of pressure

B. Centre of mass

C. Mass centre

D. Centre of gravity
107. The floods which exceeds the designed magnitude of a reservoir is called _______________________?
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A. Storm flood

B. High floods

C. Standard protects flood

D. Intensive flood

108. The total dissolved solids in drinking water should not exceed_________________?
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A. 1200 mg/litre

B. 1300 mg/litre

C. 1000 mg/litre

D. 1500 mg/litre
109. If E1 is the energy before the hydraulic jump and E2 is the energy after the hydraulic jump the efficiency of jump is then given by _____________________?
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A. E1 / E2

B. E2 / E1

C. E2 E1

D. E1 E2

110. Onion is a ___________ rooted crop?
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A. Deep

B. Non-rooted

C. Shallow

D. Spread

111. The water way from a weir is determined by using Laceys wetted perimeter i.e. P=_______(Q)1/2 ?
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A. 5.75

B. 4.75

C. 3.5

D. 3.75

112. An open cut given in a canal bank, suitably protected by stone pitching to the upland drainage water into the canal is called ___________________?
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A. Out let

B. entrance

C. Mixing

D. Inlet
113. If the duration of a unit hydrograph approaches zero, the resulting unit hydrograph is called __________________?
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A. Instantaneous unit hydrograph

B. Unit hyetgoraph

C. Intensity unit hydrograph

D. Unit hydrograph

114. When FSL of the canal is sufficiently above the bed level of drainage so that canal flows under syphonis action, the structure is called _____________________?
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A. Aqueduct

B. Canal-syphon

C. Syphon Aqueduct

D. Super passage

115. The process to dilute the available salts from root Zone by providing simply canal water is known as __________________?
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A. de-salting

B. Leaching

C. Recultivation

D. Reclamation

116. The unit of volume of water used in irrigation practice in FPS system is Acre-Foot. there fore one Acre- Foot is equal to ___________________?
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A. 43560 cubic feet

B. 40560ft3

C. 42560ft3

D. 41560ft3

117. A module or outlet in which discharge is fixed and limited, irrespective fluctuations in water levels in distributary is called _________________?
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A. Non-modular

B. Semi-modular

C. Modular

D. Semi Rigid

118. The season that starts from 1st April and end on 30th September and run for 183 days is called _____________________?
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A. Rice season

B. Rabi season

C. Kharif season

D. Cotton season

119. The counter berm for a canal is provided so as to contain the saturation gradient line _____________ the bank?
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A. Out of

B. Within

C. Below

D. Above

120. _________% of total global water is fresh and its major portion is obtained from Rains ?
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A. 2.5%

B. 3.20%

C. 2%

D. 3%

121. At the end of hydraulic structure, the upward force of sub-soil water just becomes equal to the submerged weight of soil grains Then exit gradient will be called______________?
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A. Critical exit gradient

B. Balanced exit gradient

C. Submerged exit gradient

D. All are correct

122. The force with which the distinct bodies held together when their surfaces are brought in contact to each other is called _________________?
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A. Surface tension

B. Cohesion

C. All are correct

D. Adhesion
123. The value of coefficient of discharge in comparison to cofficient of velocity is found to be ____________________?
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A. Zero

B. Equal

C. Lesser

D. More

124. The disposal of sewage by allowing it to flow and Soak into specially leveled farm land for cultivation purpose is called _____________________?
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A. Trickle irrigation

B. Check irrigation

C. Border irrigation

D. Broad irrigation
125. When a weir is constructed, the downstream .bed of the river goes on eroding and consequently causes progressive lowering of the bed on downstream of weir called__________________?
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A. Ponding on down stream

B. All are correct

C. Retrogression

D. Lowering down of bed

126. For an economical design of gravity dam, the shear friction factor causec compression strength should lie between____________________?
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A. 3 to 5

B. 2.5 to 4.5

C. 1.5 to 4.0

D. 2.0 to 4.0

127. To pack with clay material generally for the purpose of checking leakage of water is called __________________?
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A. Pug

B. Repair

C. Cohesive

D. Seal

128. Land containing high percentage of alkalies may be reclaimed by addition of_____________________?
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A. Caso4

B. Caco3

C. Gypsum

D. Chemicals

129. when ever a sloping face of river bank is protected by stone pitching against scour, the pitching is extended beyond the toe to the river side that is called__________________?
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A. Guide bank

B. Launching apron

C. Toe wall

D. Protective wall

130. When the high flood level of the drain is sufficiently below the bed of the Canal that the drainage water flows freely under gravity, such structure is called___________________?
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A. Non-gravity structure

B. Aqueduct

C. Cross-Drainage

D. Syphon-aqueduct

131. A structure constructed in channel width having narrow throat and raised floor in bottom, used for measuring discharge is called _____________________?
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A. Venturimeter

B. regulator

C. Cippoletti weir

D. Venturiflume
132. In alluvial river due to the action of centrifugal force, bends are developed by scouring on concave and silting on convex _____________________?
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A. Aggrading

B. Silting & scouring

C. Meandering

D. Degrading

133. Velocity of flow in a sewer must be form ______________ to ?
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A. 1 m / sec to 3m/ sec

B. 4.5 ml sec to 5 m/ sec

C. 4m / sec to 4.5 ml sec

D. 3m / sec to 4m/ sec

134. The ratio between the force causing a body to slide along a plane and the force normal to the plane is called __________________?
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A. Coefficient of friction

B. All are correct

C. Coefficient of internal friction

D. Coefficient of resistance

135. The Indus plain is the main agricultural producing region in the country which receives about________________m m of rain fall annually?
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A. 200 mm

B. 175 mm

C. 150 mm

D. 100 mm

136. An open cut in the canal bank. with bed and sides to escape canal water through a lead channel to mix water in a nearby drain is called _____________________?
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A. Out let

B. Module

C. Inlet

D. Exit

137. The losses of irrigation water due to the seepage but That. does not join the under ground reservoir is called __________________?
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A. Percolation losses

B. Absorption losses

C. Seepage losses

D. Evaporation losses

138. For strong Hydraulic jump containing maximum energy, the down stream glacis should be sloped at a slope of ______________ to dissipate max: energy?
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A. 2.5:1 to 3:1

B. 2:1 to 2.5:1

C. 3:1 to 5:1

D. 5:1 to 6

139. A water flow available in the drains without irrigation season i.e.flow of sanitary sewage is called____________________?
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A. Municipal flow

B. Surface flow

C. Waste water flow

D. Dry weather flow
140. Theoretical velocity of the jet at Vena Contracta is determined by ________________?
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A. 2gh

B. 2(gh)1/2

C. 2g (h)1/2

D. (2 gh)1/2
141. A mine or tunnel for collecting seepage water in rock or dam is called ____________________?
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A. Water tunnel

B. Seepage tunnel

C. Seepage Drain

D. Seepage gallery
142. Bouyant force is equal to the ___________ of liquid displaced by the body in water mass?
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A. Specific weight

B. Volume

C. Weight

D. Specific gravity

143. When FSL of the canal is sufficiently below the bottom of the drain, so that water flows freely under gravity, such structures is called_____________________?
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A. Syphon Aqueduct

B. Canal-syphon

C. Super-passage

D. Syphon

144. When the rate of change of discharge of outlet equals the rate of change of discharge of the channel, the out let is called __________________?
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A. Non-flexible

B. Flexible

C. Proportional

D. Sensitive

145. The maximum rate at which the soil in given condition can absorb water is called ___________________?
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A. Field Capacity

B. Infiltration capacity

C. Capillarity

D. All are correct

146. A structure provided when a large canal a big drainage channel approach other practically at the same level is called__________________?
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A. Level crossing

B. Canal crossing

C. Drainage crossing

D. Super passage

147. According to Chezys formula, the discharge through an open channel is equal to _________________?
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A. Ac?R.S

B. A (c.A/pi) <sup>1/2 </sup>

C. C (mi) <sup>1/2 </sup>

D. A (cmi)<sup>1/2 </sup>

148. Total energy line (T.E.L) represents the sum of ________________________?
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A. Velocity head + potential head + datum head

B. Pressure head + kinetic head and datum head

C. Velocity head + kinetic head + datum head

D. The energy head + potential head + datum head

149. A line shown on a map, drawn between the points of equal levels or heads is called ____________________?
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A. Contour line

B. Check line

C. All are correct

D. Ordinate line

150. The field capacity is the amount of water retained by a saturated soil mass after being acted by gravity. The amount of water required to bring the soil moisture content of that soil up to field capacity is called__________________?
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A. a and b are correct

B. Field-moisture deficiency

C. Soil-moisture deficiency

D. Equivalent-moisture deficiency