MCQOPTIONS
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MCQOPTIONS
This section includes 515 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
The amount of irrigation water required to meet the evapotranspiration needs of the crop during its full growth is called |
| A. | effective rainfall |
| B. | consumptive use |
| C. | consumptive irrigation requirement |
| D. | net irrigation requirement |
| Answer» D. net irrigation requirement | |
| 152. |
The meander pattern of a river is developed by |
| A. | Average discharge |
| B. | Dominant discharge |
| C. | Maximum discharge |
| D. | Critical discharge |
| Answer» C. Maximum discharge | |
| 153. |
In a Sarda type fall, the rectangular crest, may be used for discharge up to |
| A. | 6 cumecs |
| B. | 10 cumecs |
| C. | 14 cumecs |
| D. | 20 cumecs |
| Answer» D. 20 cumecs | |
| 154. |
Generally the weir is aligned at right angles to the direction of the main river current because |
| A. | It ensures less length of the weir |
| B. | It gives better discharging capacity |
| C. | It is economical |
| D. | All of the above |
| Answer» E. | |
| 155. |
In a canal syphon, the flow is |
| A. | Under atmospheric pressure |
| B. | Pipe flow |
| C. | With critical velocity |
| D. | Under negative pressure |
| Answer» C. With critical velocity | |
| 156. |
The crest level of a canal diversion head work, depends upon |
| A. | F.S.L. of the canal |
| B. | Discharge perimeters |
| C. | Pond level |
| D. | All the above |
| Answer» E. | |
| 157. |
For a flood control reservoir, the effective storage is equal to |
| A. | useful storage – valley storage |
| B. | useful storage + surcharge storage |
| C. | useful storage + surcharge storage + valley storage |
| D. | useful storage + surcharge storage -valley storage |
| Answer» E. | |
| 158. |
In Montague type fall |
| A. | A straight glacis is provided |
| B. | A circular glacis is provided |
| C. | A parabolic glacis is provided |
| D. | No glacis is provided |
| Answer» D. No glacis is provided | |
| 159. |
Silt excluders are constructed on the |
| A. | river bed upstream of head regulator |
| B. | river bed downstream of head regulator |
| C. | canal bed upstream of head regulator |
| D. | canal bed downstream of head regulator |
| Answer» B. river bed downstream of head regulator | |
| 160. |
Garnett's diagrams are used for graphical solution of design equations of a canal by |
| A. | Lacey's theory |
| B. | Kennedy's theory |
| C. | Gibb's theory |
| D. | Lindlay theory |
| Answer» C. Gibb's theory | |
| 161. |
Which of the following methods of applying water may be used on rolling land ? |
| A. | boarder flooding |
| B. | check flooding |
| C. | furrow flooding |
| D. | free flooding |
| Answer» E. | |
| 162. |
Infiltration rate is always |
| A. | more than the infiltration capacity |
| B. | less than the infiltration capacity |
| C. | equal to or less than the infiltration capacity |
| D. | equal to or more than the infiltration capacity |
| Answer» D. equal to or more than the infiltration capacity | |
| 163. |
For cereal crops the most commonly adopted method of irrigation, is |
| A. | Free flowing method |
| B. | Check method |
| C. | Furrow method |
| D. | Sprinkling method |
| Answer» C. Furrow method | |
| 164. |
According to Khosla’s theory, the exit gradient in the absence of a downstream cutoff is |
| A. | 0 |
| B. | unity |
| C. | infinity |
| D. | very large |
| Answer» D. very large | |
| 165. |
Dimensions of coefficient of transmissibility are |
| A. | M°L°T° |
| B. | rvfL’T”1 |
| C. | M° L2 T1 |
| D. | M’LV |
| Answer» D. M’LV | |
| 166. |
Regime conditions in a channel may occur if |
| A. | Discharge is constant |
| B. | Channel flows uniformly in incoherent alluvium as that transported in suspension |
| C. | Silt grade and silt charge are constant |
| D. | All the above |
| Answer» E. | |
| 167. |
S-hydrograph is used to obtain unit hydrograph of |
| A. | shorter duration from longer duration |
| B. | longer duration from shorter duration |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» D. none of the above | |
| 168. |
The best unit duration of storm for a unit hydrograph is |
| A. | 1 hour |
| B. | one-fourth of basin lag |
| C. | one-half of basin lag |
| D. | equal to basin lag |
| Answer» C. one-half of basin lag | |
| 169. |
Process of meandering is due to |
| A. | Sediment load of streams |
| B. | Discharge and hydraulic properties of streams |
| C. | Relative erodibility of the bed and banks |
| D. | All the above |
| Answer» E. | |
| 170. |
Cross regulators in main canals are provided |
| A. | To regulate water supply in the distributaries |
| B. | To increase water head upstream when a main canal is running with low supplies |
| C. | To overflow excessive flow water |
| D. | None of these |
| Answer» C. To overflow excessive flow water | |
| 171. |
The most suitable location of a canal head work, is |
| A. | Boulders stage of the river |
| B. | Delta stage of the river |
| C. | Rock stage of the river |
| D. | Trough stage of the river |
| Answer» E. | |
| 172. |
If the R.L’s of canal bed level and high flood level of drainage are 212.0 m and 210.0 m respectively, then cross drainage work will be |
| A. | aqueduct |
| B. | superpassage |
| C. | syphon |
| D. | syphon aqueduct |
| Answer» D. syphon aqueduct | |
| 173. |
If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation |
| A. | t = (h + 1)/(G + t) |
| B. | t = (h - 1)/(G + t) |
| C. | t = (h - 1)/(G - t) |
| D. | t = (h + 1)/G |
| Answer» D. t = (h + 1)/G | |
| 174. |
Cyclonic precipitation is caused by lifting of an air mass due to |
| A. | pressure difference |
| B. | temperature difference |
| C. | natural topographical barriers |
| D. | all of the above |
| Answer» B. temperature difference | |
| 175. |
Effective precipitation for a crop may be defined as |
| A. | Total precipitation minus the loss due to evaporation |
| B. | Total precipitation minus the loss due to infiltration |
| C. | Total precipitation during the crop period |
| D. | Available water stored in soil within root zone of the crop |
| Answer» E. | |
| 176. |
The water utilizable by plants is available in soils mainly in the form of |
| A. | gravity water |
| B. | capillary water |
| C. | hydroscopic water |
| D. | chemical water |
| Answer» C. hydroscopic water | |
| 177. |
Infiltration capacity |
| A. | is a constant factor |
| B. | changes with time |
| C. | changes with location |
| D. | changes with both time and location |
| Answer» E. | |
| 178. |
Irrigation canals are generally aligned along |
| A. | Ridge line |
| B. | Contour line |
| C. | Valley line |
| D. | Straight line |
| Answer» B. Contour line | |
| 179. |
The depth of the crest of a scouring sluice below the crest of a head regulator, is generally kept |
| A. | 0.20 m |
| B. | 1.20 m |
| C. | 2.20 m |
| D. | 3.20 m |
| Answer» C. 2.20 m | |
| 180. |
Retrogression of the bed level of a river downstream a weir, occurs due to |
| A. | Heavy impact of water |
| B. | Increase of the bed level |
| C. | Less percentage of silt |
| D. | Soft soil strata |
| Answer» D. Soft soil strata | |
| 181. |
A fall which maintains its depth, is |
| A. | A trapezoidal notch fall |
| B. | A low weir fall |
| C. | A rectangular notch fall |
| D. | All the above |
| Answer» E. | |
| 182. |
The main cause of silting up a channel, |
| A. | Non-regime section |
| B. | Inadequate slope |
| C. | Defective head regulator |
| D. | All the above |
| Answer» E. | |
| 183. |
The ratio of average values of shear stresses produced on the bed and the banks of a channel due to flowing water is |
| A. | less than 1 |
| B. | equal to 1 |
| C. | greater than 1 |
| D. | equal to zero |
| Answer» D. equal to zero | |
| 184. |
The width of a meander belt is the transverse distance between |
| A. | Apex point of one curve and apex point of the reserve curve |
| B. | Apex point and the crossing |
| C. | Two banks of meandering river |
| D. | None of these |
| Answer» B. Apex point and the crossing | |
| 185. |
In rigid module, the discharge |
| A. | Is independent of water levels in the distributary and water course |
| B. | Depends upon the water level in distributary |
| C. | Depends upon the water level in the water course |
| D. | Depends upon the water levels of both, i.e. distributary and water course |
| Answer» B. Depends upon the water level in distributary | |
| 186. |
A straight glacis type fall with a baffle platform and a baffle wall is called |
| A. | Vertical drop-fall |
| B. | Glacis fall |
| C. | Montague type fall |
| D. | Inglis fall |
| Answer» E. | |
| 187. |
The relation between probability (P) and recurrence interval (T) is given by |
| A. | PT = 1 |
| B. | PT2 = 1 |
| C. | P/T = 1 |
| D. | P/T2 = 1 |
| Answer» B. PT2 = 1 | |
| 188. |
The most suitable material for the central impervious core of a zoned embankment type dam is |
| A. | clay |
| B. | coarse sand |
| C. | silty clay |
| D. | clay mixed with fine sand |
| Answer» E. | |
| 189. |
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» B. reservoir was not full at the beginning | |
| 190. |
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» B. 0.6 x 106 | |
| 191. |
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» D. All of the above | |
| 192. |
If the critical shear stress of a channel is XC, then the average value of shear stress required to move the grain on the bank is |
| A. | 0.5 XC |
| B. | 0.75 TC |
| C. | XC |
| D. | 1.33 TC |
| Answer» C. XC | |
| 193. |
For the upstream face of an earthen dam, the most adverse condition for stability of slope is |
| A. | sudden drawdown |
| B. | steady seepage |
| C. | during construction |
| D. | sloughing of slope |
| Answer» B. steady seepage | |
| 194. |
When a canal is carried over a natural drainage, the structure provided, is known as |
| A. | Syphon |
| B. | Aqueduct |
| C. | Super passage |
| D. | Syphon-aqueduct |
| Answer» C. Super passage | |
| 195. |
To control the silt entry into a distributary at head regulator, King's vanes are provided which are the walls |
| A. | Of R.C.C. or steel plate 8 cm thick |
| B. | Of height ⅓rd to ¼th the depth of water in the main canal |
| C. | Spaced at interval of 1½ times their heights |
| D. | All the above |
| Answer» E. | |
| 196. |
The depth of rice root zone, is |
| A. | 50 cm |
| B. | 60 cm |
| C. | 80 cm |
| D. | 90 cm |
| Answer» E. | |
| 197. |
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» D. none of the above | |
| 198. |
Horizontal acceleration due to earthquake results in |
| A. | hydrodynamic pressure |
| B. | inertia force into the body of the dam |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» D. none of the above | |
| 199. |
As per Lacey’s theory, the silt factor is |
| A. | directly proportional to average par¬ticle size |
| B. | inversely proportional to average par¬ticle size |
| C. | directly proportional to square root of average particle size |
| D. | not related to average particle size |
| Answer» D. not related to average particle size | |
| 200. |
For a proportional outlet, the flexibility is |
| A. | zero |
| B. | between zero and 1 |
| C. | 1 |
| D. | greater than 1 |
| Answer» D. greater than 1 | |