![Mcqmate logo](https://mcqmate.com/public/images/logos/logo-black.png)
![Mcqmate logo](https://mcqmate.com/public/images/logos/logo-white.png)
McqMate
101. |
The main cause of meandering is |
A. | presence of an excessive bed slope in the river |
B. | degradation |
C. | the extra turbulence generated by the excess of river sediment during floods |
D. | none of the above |
Answer» C. the extra turbulence generated by the excess of river sediment during floods |
102. |
Tortuosity of a meandering river is always |
A. | equal to 1 |
B. | less than 1 |
C. | greater than 1 |
D. | less than or equal to 1 |
Answer» C. greater than 1 |
103. |
Select the correct statement. |
A. | A meander increases the river length but a cut off reduces the river length. |
B. | A cutoff increases the river length but a meander reduces the river length. |
C. | Both meander and cutoff increase the river length. |
D. | Both meander and cutoff decrease the river length. |
Answer» A. A meander increases the river length but a cut off reduces the river length. |
104. |
River training for depth is achieved by |
A. | groynes |
B. | construction of dykes or leavees |
C. | both (a) and (b) |
D. | groynes and bandalling |
Answer» D. groynes and bandalling |
105. |
Main purpose of mean water training for rivers is |
A. | flood control |
B. | to provide sufficient depth of water in navigable channels, during low water periods |
C. | to preserve the channel in good shape by efficient disposal of suspended and bed load |
D. | all of the above |
Answer» C. to preserve the channel in good shape by efficient disposal of suspended and bed load |
106. |
If D is the depth of scour below original bed, then the width of launching apron is generally taken as |
A. | 1.2 D |
B. | 1.5 D |
C. | 2.0 D |
D. | 2.5 D |
Answer» B. 1.5 D |
107. |
Study the following statements.
|
A. | (i) and (ii) |
B. | (i) and (iv) |
C. | (ii) and (iii) |
D. | (iii) and (iv) |
Answer» B. (i) and (iv) |
108. |
A repelling groyne is aligned |
A. | pointing upstream |
B. | pointing downstream |
C. | perpendicular to bank |
D. | parallel to bank |
Answer» A. pointing upstream |
109. |
A river training work is generally required when the river is |
A. | aggrading type |
B. | degrading type |
C. | meandering type |
D. | both (a) and (b) |
Answer» C. meandering type |
110. |
A river bend characterized by silting |
A. | scouring on concave side |
B. | silting on convex side |
C. | scouring on convex side and on concave side |
D. | scouring on concave side and silting on convex side |
Answer» D. scouring on concave side and silting on convex side |
111. |
Select the incorrect statement. |
A. | Intensive irrigation should be avoided in areas susceptible to water logging. |
B. | Extensive irrigation should be adopted in areas susceptible to water logging. |
C. | Lift irrigation increases water logging. |
D. | all of the above |
Answer» C. Lift irrigation increases water logging. |
112. |
A land is known as waterlogged |
A. | when the permanent wilting point is reached |
B. | when gravity drainage has ceased |
C. | capillary fringe reaches the root zone of plants |
D. | none of the above |
Answer» C. capillary fringe reaches the root zone of plants |
113. |
Lining of irrigation channels |
A. | increases the waterlogging area |
B. | decreases the waterlogging area |
C. | does not change the water logging area |
D. | none of the above |
Answer» B. decreases the waterlogging area |
114. |
A runoff river plant is |
A. | a low head scheme |
B. | a medium head scheme |
C. | a high head scheme |
D. | none of the above |
Answer» A. a low head scheme |
115. |
The net speed under which the turbine reaches its peak efficiency is called |
A. | design speed |
B. | rated speed |
C. | gross speed |
D. | operating speed |
Answer» A. design speed |
116. |
A runoff river plant |
A. | is a medium head scheme |
B. | generates power during peak hours only |
C. | is suitable only on a perennial river |
D. | has no pondage at all |
Answer» C. is suitable only on a perennial river |
117. |
The net head under which the turbine reaches its peak efficiency at synchronous speed is called |
A. | design head |
B. | rated head |
C. | gross head |
D. | operating head |
Answer» A. design head |
118. |
The ratio of the average load to the installed capacity of the plant whose reserve capacity is zero will be equal to |
A. | load factor |
B. | plant factor |
C. | utilisation factor |
D. | both (a) and (b) |
Answer» D. both (a) and (b) |
119. |
A hydroelectric scheme operating under a head of 80 m will be classified as |
A. | low head scheme |
B. | medium head scheme |
C. | high head scheme |
D. | none of the above |
Answer» C. high head scheme |
120. |
A hyetograph is a graphical representation of |
A. | rainfall intensity and time |
B. | rainfall depth and time |
C. | discharge and time |
D. | cumulative rainfall and time |
Answer» A. rainfall intensity and time |
121. |
Variability of rainfall is
|
A. | only (i) |
B. | (i) and (ii) |
C. | only (iii) |
D. | (ii) and (iii) |
Answer» C. only (iii) |
122. |
In India, which of the following is adopted as standard recording raingauge ? |
A. | Symon's raingauge |
B. | tipping bucket type |
C. | natural syphon type |
D. | weighing bucket type |
Answer» C. natural syphon type |
123. |
The maximum average depth due to one day storm over an area of 100 km2 is 100 mm. Depth-Area-Duration (DAD) curves indicate that for the same area of 100 km2 the maximum average depth for a 3 hour storm will be |
A. | 100 mm |
B. | more than 100 mm |
C. | less than 100 mm |
D. | none of the above |
Answer» B. more than 100 mm |
124. |
The maximum rainfall depth of 300 mm in 24 hours has a return period of 100 years. The probability of 24 hours rainfall equal to or greater than 300 mm occurring at least once in 10 years is given by |
A. | (0.99)10 |
B. | 1 - (0.99)10 |
C. | (0.9)'00 |
D. | l-(0.9)100 |
Answer» B. 1 - (0.99)10 |
125. |
The most suitable chemical which can be applied to the water surface for reducing evaporation is |
A. | methyl alcohol |
B. | ethyl alcohol |
C. | cetyl alcohol |
D. | butyl alcohol |
Answer» C. cetyl alcohol |
126. |
Interception losses are due to
|
A. | only (i) |
B. | (i)and(ii) |
C. | (ii) and (iii) |
D. | (i), (ii) and (iii) |
Answer» A. only (i) |
127. |
A 6 hours storm had 4 cm of rainfall and the resulting runoff was 2 cm. If <j) index remains at the same value, the runoff due to 10 cm of rainfall in 12 hours in the catchment is |
A. | 4.5 cm |
B. | 6.0 cm |
C. | 7.5 cm |
D. | 9.0 cm |
Answer» B. 6.0 cm |
128. |
Which of the following methods is used to estimate flood discharge based on high water marks left over in the past ? |
A. | slope-area method |
B. | area-velocity method |
C. | moving boat method |
D. | ultra-sonic method |
Answer» A. slope-area method |
129. |
To determine the discharge at a section in a stream from its rating curve, the required data are
|
A. | (i) and (ii) |
B. | (ii) and (iii) |
C. | only (ii) |
D. | only (iii) |
Answer» C. only (ii) |
130. |
The stage of river carrying a discharge of Q m7sec at a point is 10 m and slope of water surface is (1/4000). The discharge of a flood at the same point and same stage of 10 m with a water surface slope of(l/1000)willbe |
A. | V2 Q m3/sec |
B. | 0.5 Q mVsec |
C. | 2 Q m3/sec |
D. | 4 Q m3/sec |
Answer» C. 2 Q m3/sec |
131. |
The stream which does not have any base flow contribution is called |
A. | perennial stream |
B. | intermittent stream |
C. | ephemeral stream |
D. | none of the above |
Answer» C. ephemeral stream |
132. |
The flow-mass curve is graphical representation of |
A. | cumulative discharge and time |
B. | discharge and percentage probability of flow being equaled or exceeded |
C. | cumulative discharge, volume and time in chronological order |
D. | discharge and time in chronological order |
Answer» C. cumulative discharge, volume and time in chronological order |
133. |
If the demand line drawn from a ridge in a flow mass curve does not intersect the curve again, it indicates that |
A. | demand cannot be met by inflow |
B. | reservoir was not full at the beginning |
C. | both (a) and (b) |
D. | none of the above |
Answer» A. demand cannot be met by inflow |
134. |
The shape of recession limb of a hydrograph depends upon |
A. | basin characteristics only |
B. | storm characteristics only |
C. | both (a) and (b) |
D. | none of the above |
Answer» A. basin characteristics only |
135. |
Instantaneous unit hydrograph is a hydrograph of
|
A. | (i) and (ii) |
B. | (i)and(iv) |
C. | (ii) and (iii) |
D. | (iii) and (iv) |
Answer» C. (ii) and (iii) |
136. |
For a catchment area of 120 km2, the equilibrium discharge in m3/hour of an S-curve obtained by the summation of 6 hour unit hydro graph is |
A. | 0.2 x 106 |
B. | 0.6 x 106 |
C. | 2.4 xlO6 |
D. | 7.2 xlO6 |
Answer» A. 0.2 x 106 |
137. |
A unit hydro graph has one unit of |
A. | rainfall duration |
B. | rainfall excess |
C. | time base of direct runoff |
D. | discharge |
Answer» B. rainfall excess |
138. |
The peak of a 4 hour flood hydrograph is 240 m3/sec . If the rainfall excess is 80 mm and base flow which is constant is 40 m3/sec, then the peak of 4-hours unit hydrograph will be |
A. | 20 3/sec |
B. | 25 m3/sec |
C. | 30 m3/sec |
D. | 35 m3/sec |
Answer» B. 25 m3/sec |
139. |
To estimate the magnitude of a flood with a return period of T years, Gumbel's distribution method requires the following data pertaining to annual flood series
|
A. | (i) and (ii) |
B. | (i),(ii) and (iii) |
C. | (i), (ii) and (iv) |
D. | (i), (ii), (iii) and (iv) |
Answer» B. (i),(ii) and (iii) |
140. |
For an annual flood series arranged in descending order of magnitude, the return for a magnitude listed at position period m in a total data N is |
A. | N/(m+l) |
B. | m/(N+l) |
C. | m/N |
D. | (N+l)/m |
Answer» D. (N+l)/m |
141. |
If the risk of a flood occurring in the next 10 years is accepted to 10%, then the return period for design should be |
A. | 1 + (0.9)010 |
B. | 1 - (0.9)°l0 |
C. | 1/(1-0.9°10) |
D. | 1/(1+ 0.9010) |
Answer» C. 1/(1-0.9°10) |
142. |
The crest level in a barrage is kept at a |
A. | low |
B. | high |
C. | moderate |
Answer» A. low |
143. |
When the full supply level (F.S.L.) of the canal is much below the bed level of the drainage trough, then the cross drainage provided is called syphon aqueduct. |
A. | Yes |
B. | No |
Answer» B. No |
144. |
A spoil bank is formed when the |
A. | canal has steel bed slope |
B. | canal section is too large |
C. | volume of excavation is in excess of the embankment filling |
D. | canal alignment is meandrous |
Answer» C. volume of excavation is in excess of the embankment filling |
145. |
When the drain is over the canal, the structure provided is known as |
A. | aqueduct |
B. | super-passage |
C. | canal syphon |
D. | syphon aqueduct |
Answer» B. super-passage |
146. |
A levee on flood |
A. | increases the water surface elevation of the river at flood |
B. | decreases the surface slope of the stream above the leveed portion |
C. | increases the velocity and scouring action through leveed section |
D. | all of the above |
Answer» D. all of the above |
147. |
The primary cause of meandering is the excess of total charge during floods, when excess of turbulence is developed. |
A. | True |
B. | False |
Answer» A. True |
148. |
In order to estimate the high flood discharge in fan-shaped catchment, the formula used is |
A. | Dicken's formula |
B. | Ryve's formula |
C. | Inglis formula |
D. | Fanning's formula |
Answer» C. Inglis formula |
149. |
The capacity of escape channel should not be less than |
A. | 20% |
B. | 30% |
C. | 40% |
D. | 50% |
Answer» D. 50% |
150. |
The whole period of cultivation from the time when irrigation water is first supplied for preparation of the ground to its last watering before harvesting, is called |
A. | base period |
B. | crop period |
C. | kor period |
D. | none of these |
Answer» A. base period |
151. |
A baffle wall is a sort of low weir constructed at the end of the cistern to |
A. | head up water to its upstream to such a height that hydraulic jump is formed |
B. | withstand the actual impact of the high velocity jet to dissipate the energy |
C. | both (a) and (b) |
D. | none of the above |
Answer» C. both (a) and (b) |
152. |
The function of a barrage is different to that a weir. |
A. | Correct |
B. | Incorrect |
Answer» B. Incorrect |
153. |
The irrigation engineering may be defined as |
A. | the process of artificially supplying water to soil for raising crops |
B. | a science of planning and designing an efficient and economic irrigation system |
C. | the engineering of controlling and harnessing the various natural sources of water, by the construction of dams, canals and finally distributing the water to the agricultural fields |
D. | all of the above |
Answer» D. all of the above |
154. |
Liquid precipitation consists of |
A. | snow |
B. | hail |
C. | sleet |
D. | rainfall |
Answer» D. rainfall |
155. |
The main cause of silting in channel is |
A. | non-regime section |
B. | inadequate slope |
C. | defective head regulator |
D. | all of these |
Answer» D. all of these |
156. |
Lacey's theory as applied to channel design, involves trial and error procedure. |
A. | Agree |
B. | Disagree |
Answer» B. Disagree |
157. |
The ratio between the area of a crop irrigated and the quantity of water required during its entire period of the growth, is known as |
A. | delta |
B. | duty |
C. | base period |
D. | crop period |
Answer» B. duty |
158. |
The loss of head per unit length of creep is called |
A. | coefficient of creep |
B. | percolation coefficient |
C. | Lane's coefficient |
D. | none of these |
Answer» B. percolation coefficient |
159. |
The basic factor which controls the process of meandering is |
A. | discharge |
B. | valley slope |
C. | bed and side resistance |
D. | all of these |
Answer» D. all of these |
160. |
In a flexible outlet, the discharge depends upon the |
A. | water level in distributary |
B. | water level in water course |
C. | difference of water levels between distributary and water course |
D. | none of the above |
Answer» A. water level in distributary |
161. |
A river meandering through an alluvial plain has a series of consecutive curves of reversed order connected with short straight sketches, is called |
A. | crossing |
B. | meandering belt |
C. | meandering length |
D. | none of these |
Answer» A. crossing |
162. |
The water shed canal is also called |
A. | side slope canal |
B. | contour canal |
C. | ridge canal |
D. | all of these |
Answer» C. ridge canal |
163. |
In an Inglis type fall, the baffle holds the jump stable on a horizontal platform. |
A. | Agree |
B. | Disagree |
Answer» A. Agree |
164. |
The borrow pits should, preferably, be taken from |
A. | the field on the right side of canal |
B. | the field on the left side of the canal |
C. | the central half width of the section of the canal |
D. | any one of the above |
Answer» C. the central half width of the section of the canal |
165. |
Rivers on alluvial plains may be |
A. | meandering type |
B. | aggrading type |
C. | degrading type |
D. | all of these |
Answer» D. all of these |
166. |
A canal sligned nearly parallel to the contours of a country, is known as |
A. | side slope canal |
B. | contour canal |
C. | water shed canal |
D. | ridge canal |
Answer» B. contour canal |
167. |
The duty at outlet is called capacity factor. |
A. | Correct |
B. | Incorrect |
Answer» B. Incorrect |
168. |
The duty is largest |
A. | at the head of the main canal |
B. | at the head of the water course |
C. | on the field |
D. | at all place |
Answer» C. on the field |
169. |
The knowledge of hydrology is necessary in civil engineering for |
A. | designing and construction of irrigation structures |
B. | designing and construction of bridges and culverts |
C. | flood control works |
D. | all of these |
Answer» D. all of these |
170. |
Nawab Jang Bahadur formula is used to estimate the flood discharge of American catchments |
A. | Right |
B. | Wrong |
Answer» B. Wrong |
171. |
For closed growing crops (such as wheat), the method of irrigation used is |
A. | free flooding |
B. | border flooding |
C. | check flooding |
D. | basin flooding |
Answer» B. border flooding |
172. |
The crest of the under-sluices should be lower than the crest of the head regulator (if silt excluder is provided by at least |
A. | 1 to 1.2 m |
B. | 1.8 to 2 m |
C. | 2 to 2.5 m |
D. | 4 to 5 m |
Answer» B. 1.8 to 2 m |
173. |
In Bligh's creep theory, it is assumed that the percolation water creep |
A. | along the contact of the base profile of the apron with the sub-soil |
B. | in a straight path under the floor |
C. | in a straight path under the foundation work |
D. | none of the above |
Answer» A. along the contact of the base profile of the apron with the sub-soil |
174. |
When the irrigation canal and the drain are at the same level, then the cross drainage work is achieved by providing a |
A. | aqueduct |
B. | super-passage |
C. | level crossing |
D. | canal syphon |
Answer» C. level crossing |
175. |
The amount of precipitation is measured by |
A. | rain gauge |
B. | osmoscope |
C. | turbidimeter |
D. | all of these |
Answer» A. rain gauge |
176. |
Distributary head regulators are provided |
A. | to control the supplies to the off-taking channel |
B. | to control the silt entry in the off-taking canal |
C. | to stop the supply, when not needed, in the off-taking canal |
D. | all of the above |
Answer» D. all of the above |
177. |
Which of the following is a type of semi-module outlet? |
A. | Submerged pipe outlet |
B. | Open flume outlet |
C. | Kennedy's gauge outlet |
D. | all of these |
Answer» C. Kennedy's gauge outlet |
178. |
The opening in the weir wall with a crest at low level on the canal side is known as under sluice or scouring sluice. |
A. | Correct |
B. | Incorrect |
Answer» A. Correct |
179. |
The optimum depth of kor watering for wheat in the plains of north India is |
A. | 13.5 cm |
B. | 16.5 cm |
C. | 19 cm |
D. | 21 cm |
Answer» A. 13.5 cm |
180. |
The flexibility of a hyper-proportional outlet is |
A. | greater than |
B. | equal to |
C. | less than |
Answer» A. greater than |
181. |
In a proportional outlet, the rate of change of its discharge is |
A. | equal to |
B. | more than |
C. | less than |
Answer» A. equal to |
182. |
A weir fails due to |
A. | rupture of floor due to uplift |
B. | rupture of floor due to suction caused by standing wave |
C. | scour on the upstream and downstream of the weir |
D. | all of the above |
Answer» D. all of the above |
183. |
The average delta of rice crop is nearly |
A. | 30 cm |
B. | 60 cm |
C. | 120 cm |
D. | 150 cm |
Answer» C. 120 cm |
184. |
The science which deals with the physical features and conditions of water on the earth surface is called |
A. | hydrometry |
B. | hydrography |
C. | hydrosphere |
D. | hydraulics |
Answer» B. hydrography |
185. |
A groyne with a curved head is known as |
A. | hockey groyne |
B. | burma groyne |
C. | denehy groyne |
D. | none of these |
Answer» A. hockey groyne |
186. |
The slope of a canal, for a discharge of 300 cumecs, should be |
A. | 1 in 4000 |
B. | 1 in 6000 |
C. | 1 in 8000 |
D. | 1 in 10000 |
Answer» C. 1 in 8000 |
187. |
The precipitation caused by natural rising of warmer lighter air in colder and denser surroundings, is called |
A. | convective precipitation |
B. | orographic precipitation |
C. | cyclonic precipitation |
D. | none of these |
Answer» A. convective precipitation |
188. |
The sensitivity of a rigid module is |
A. | equal to zero |
B. | less than unity |
C. | equal to unity |
D. | more than unity |
Answer» A. equal to zero |
189. |
The Sarda canal has a |
A. | glacis type fall |
B. | vertical drop fall |
C. | Ogee fall |
D. | rapid fall |
Answer» B. vertical drop fall |
190. |
When discharge of an outlet is independent of the water levels in the water course and the distributary, the outlet is termed as a |
A. | flexible outlet |
B. | non-modular outlet |
C. | semi-module outlet |
D. | rigid module |
Answer» D. rigid module |
191. |
For low navigation dams, the type of gate used is |
A. | rolling gate |
B. | bear trap gate |
C. | vertical lift gate |
D. | drum gate |
Answer» B. bear trap gate |
192. |
The coefficient of creep is the reciprocal of percolation coefficient. |
A. | Right |
B. | Wrong |
Answer» A. Right |
193. |
Cross regulators are provided |
A. | to raise the water level to its upstream during the periods of low discharges in the parent channel |
B. | to help in closing the supply to down stream of the parent channel |
C. | to absorb fluctuation in various sections of the canal system |
D. | all of the above |
Answer» D. all of the above |
194. |
The commonly used rain gauge is |
A. | weighing bucket type |
B. | tipping bucket type |
C. | float type |
D. | none of these |
Answer» C. float type |
195. |
Which of the following statement is wrong? |
A. | In Kennedy's wilt theory, no account was taken of silt concentration and bed load. |
B. | Kennedy did not gave any slope equation. |
C. | In Kennedy's theory, silt grade and silt charge were not defined. |
D. | none of the above |
Answer» D. none of the above |
196. |
The sensitivity of an outlet is defined as the ratio of the |
A. | rate of change of discharge of an outlet to the rate of change of discharge of the distributing channel |
B. | rate of change of discharge of an outlet to the rate of change in level of the distributing surface, referred to normal depth of the channel |
C. | depth of the sill or the crest level of the module below the full supply of the distributing channel to the full supply depth of the distributing channel |
D. | head recovered to the head put in an outlet |
Answer» B. rate of change of discharge of an outlet to the rate of change in level of the distributing surface, referred to normal depth of the channel |
197. |
Crop ratio is the ratio of area irrigated |
A. | in Rabi season to Kharif season |
B. | in Kharif season to Rabi season |
C. | under perennial crop to total crop |
D. | under perennial crop to non-perennial crop |
Answer» B. in Kharif season to Rabi season |
198. |
The depth of root zone is 90 cm for |
A. | wheat |
B. | sugar cane |
C. | rice |
D. | cotton |
Answer» C. rice |
199. |
A parabolic glacis type fall is commonly known as |
A. | Montague fall |
B. | Inglis fall |
C. | Sarda fall |
D. | vertical type fall |
Answer» A. Montague fall |
200. |
For Madras catchments, the flood discharge is estimated from Q = CA2/3. This formula is known as |
A. | Dicken's formula |
B. | Ryve's formula |
C. | Nawab Jang Bahadur formula |
D. | Inglis formula |
Answer» B. Ryve's formula |
Done Reading?