McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 351. |
The irrigation is necessary in an area |
| A. | where there is a scanty rainfall |
| B. | where the rainfall is non-uniform |
| C. | where commercial crops require more water |
| D. | all of the above |
| Answer» D. all of the above | |
| 352. |
The infertility of the soil in water-logged areas is due to |
| A. | inhibiting activity of the soil bacteria |
| B. | growth of weeds |
| C. | increasing of harmful salts |
| D. | all of these |
| Answer» D. all of these | |
| 353. |
A canal outlet should |
| A. | be so designed that the farmer cannot temper with its functioning |
| B. | be simple so that it can be constructed or fabricated by local masons |
| C. | draw its fare share of silt carried by the distributing channel |
| D. | all of the above |
| Answer» D. all of the above | |
| 354. |
The moisture content of the soil, after free drainage has removed most of the gravity water, is known as |
| A. | field capacity |
| B. | saturation capacity |
| C. | wilting co-efficient |
| D. | available moisture |
| Answer» A. field capacity | |
| 355. |
A solid construction put across the river to raise its water level and divert the water into the canal, is known as |
| A. | marginal bund |
| B. | weir |
| C. | barrage |
| D. | dam |
| Answer» B. weir | |
| 356. |
The most economical section of a lined canal is |
| A. | rectangular section with circular bottom for small discharges |
| B. | triangular section with circular bottom for small discharges |
| C. | trapezoidal section with rounded corners for higher discharges |
| D. | none of the above |
| E. | both (b) and (c) |
| Answer» E. both (b) and (c) | |
| 357. |
A side slope canal, cross-drainage works are completely eliminated. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 358. |
The hydrology helps in |
| A. | predicting maximum discharge |
| B. | deciding capacity of reservoir |
| C. | fore casting flood |
| D. | all of these |
| Answer» D. all of these | |
| 359. |
A weir is generally aligned at right angle to the direction of the main river flow because |
| A. | it is economical |
| B. | less length of weir is required |
| C. | it gives better discharge capacity |
| D. | all of these |
| Answer» D. all of these | |
| 360. |
A deflecting groyne in a river is |
| A. | inclined towards upstream |
| B. | perpendicular to bank |
| C. | inclined towards downstream |
| D. | none of these |
| Answer» B. perpendicular to bank | |
| 361. |
The method used for training of rivers is |
| A. | guide bank |
| B. | dyke or levee |
| C. | groyne |
| D. | all of these |
| Answer» D. all of these | |
| 362. |
In a barrage, crest level is kept |
| A. | low with large gates |
| B. | high with large gates |
| C. | high with small gates |
| D. | low with small gates |
| Answer» A. low with large gates | |
| 363. |
The process of loosing water from the leaves of plants, is termed as |
| A. | surface evaporation |
| B. | water surface evaporation |
| C. | transpiration |
| D. | precipitation |
| Answer» C. transpiration | |
| 364. |
A graph showing variations of discharge with time, at a particular point of a stream is known as |
| A. | mass inflow curve |
| B. | logistic curve |
| C. | hydrograph |
| D. | none of these |
| Answer» C. hydrograph | |
| 365. |
The average duty for sugar-cane in hectares/cumec is |
| A. | 200 |
| B. | 400 |
| C. | 600 |
| D. | 800 |
| Answer» D. 800 | |
| 366. |
When river flows in a plain country, its stage is known as |
| A. | delta |
| B. | boulder |
| C. | trough |
| D. | rocky |
| Answer» C. trough | |
| 367. |
In a syphon, the underside of the trough carrying drainage water is |
| A. | lower than |
| B. | higher than |
| C. | in level with |
| Answer» B. higher than | |
| 368. |
A land is said to be water-logged when |
| A. | the air circulation is stopped in the root zone due to the rise in water table |
| B. | it is submerged in flood |
| C. | the doil pores within a depth of 40 cm are saturated |
| D. | all of the above |
| Answer» A. the air circulation is stopped in the root zone due to the rise in water table | |
| 369. |
The setting for a sub-proportional outlet is |
| A. | more |
| B. | less |
| C. | same |
| Answer» B. less | |
| 370. |
The maximum rainfall during a short period measured in mm / hour is called mean annual rainfall. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 371. |
The time (in days) that crop takes from the instant of its sowing to that of its harvest, is known as |
| A. | base |
| B. | crop |
| C. | kor |
| Answer» B. crop | |
| 372. |
The perimeter discharge (P-Q) relation is given by the equation |
| A. | P = 2.25 Q1/2 |
| B. | P = 2.25 Q3/2 |
| C. | P = 4.75 Q1/2 |
| D. | P = 4.75 Q3/2 |
| Answer» C. P = 4.75 Q1/2 | |
| 373. |
Available moisture may be defined as the |
| A. | moisture content at permanent wilting point |
| B. | difference in water content of the soil between field capacity and permanent wilting |
| C. | maximum moisture holding capacity |
| D. | all of these |
| Answer» B. difference in water content of the soil between field capacity and permanent wilting | |
| 374. |
Which of the following statement is correct? |
| A. | The gravity water is harmful to the crops. |
| B. | The hygroscopic water remains attached to the soil molecules by chemical bonds. |
| C. | The capillary water is utilised by the plants. |
| D. | all of the above |
| Answer» C. The capillary water is utilised by the plants. | |
| 375. |
The fall of moisture from the atmosphere to the earth surface in any form, is called |
| A. | evaporation |
| B. | transpiration |
| C. | precipitation |
| D. | none of these |
| Answer» C. precipitation | |
| 376. |
The graphical representation of average rainfall and rainfall excess (i.e. rainfall minus infiltration) rates over specified areas during successive unit time intervals during a storm is known as |
| A. | hydrograph |
| B. | unit hydrograph |
| C. | hyetograph |
| D. | none of these |
| Answer» C. hyetograph | |
| 377. |
The maximum depth in soil strata, in which the crop spreads its root system, and derives water from the soil, is called |
| A. | kot depth |
| B. | root zone depth |
| C. | delta |
| D. | overlap allowance |
| Answer» B. root zone depth | |
| 378. |
In a canal section, which is in partial filling and partial cutting |
| A. | the full supply level of the canal is above the natural surface level |
| B. | the bed level of the canal is below the natural surface level |
| C. | the full supply level of the canal is below the natural surface level |
| D. | the bed level of the canal is above the natural surface level |
| E. | both (a) and (b) |
| Answer» E. both (a) and (b) | |
| 379. |
The free board in a channel is governed by the |
| A. | size of the canal |
| B. | location of the canal |
| C. | water surface fluctuations |
| D. | all of these |
| Answer» D. all of these | |
| 380. |
According to Khosla's theory, the exit gradient in the absence of a downstream cut-off is |
| A. | zero |
| B. | unity |
| C. | infinity |
| D. | none of these |
| Answer» C. infinity | |
| 381. |
Which of the following statement is wrong? |
| A. | The impermeable groynes do not permit any flow through them. |
| B. | The impermeable groynes may be constructed by a core of locally available material like sand, clay and gravel. |
| C. | The permeable groynes dampen the velocity and reduce the erosive action of the stream. |
| D. | none of the above |
| Answer» D. none of the above | |
| 382. |
Water logging takes place due to |
| A. | rise |
| B. | fall |
| Answer» A. rise | |
| 383. |
Outlet discharge for a particular crop is given by |
| A. | Area / Outlet factor |
| B. | Outlet factor / Area |
| C. | Area x Outlet factor |
| D. | none of these |
| Answer» A. Area / Outlet factor | |
| 384. |
Which of the following statements is wrong? |
| A. | Seepage drains reduce the chances of water logging. |
| B. | The water table generally follows the ground surface above it with a few exceptions. |
| C. | At the water table, the hydrostatic pressure is zero. |
| D. | Water logging makes the land more productive. |
| Answer» D. Water logging makes the land more productive. | |
| 385. |
A groyne |
| A. | contracts a river channel to improve its depth |
| B. | silts up the area in the vicinity by creating a slack flow |
| C. | trains the flow along a certain course |
| D. | all of the above |
| Answer» D. all of the above | |
| 386. |
An aggrading river is a |
| A. | scouring |
| B. | silting |
| Answer» B. silting | |
| 387. |
The consumptive use of water of a crop |
| A. | is measured as the volume of water per unit area |
| B. | is measured as depth of water on irrigated area |
| C. | may be supplied partly by precipitation and partly by irrigation |
| D. | all of the above |
| Answer» D. all of the above | |
| 388. |
A deflecting groyne has a much |
| A. | longer |
| B. | shorter |
| Answer» B. shorter | |
| 389. |
Which of the following method is useful for obtaining values of flood discharges for a high recurrence interval? |
| A. | California method |
| B. | Hazen's method |
| C. | Gumbel's method |
| D. | all of these |
| Answer» C. Gumbel's method | |
| 390. |
The first watering, when the crop has grown a few centimetres, is called paleo. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 391. |
A river training work is generally required when the river is |
| A. | aggrading type |
| B. | degrading type |
| C. | meandering type |
| D. | stable type |
| Answer» C. meandering type | |
| 392. |
The narrow strip of land left at the ground level between the inner toe of the bank and top edge of the cutting, is known as |
| A. | free board |
| B. | dowel |
| C. | inspection roadway |
| D. | berm |
| Answer» D. berm | |
| 393. |
Run-off is measured in |
| A. | m3/s |
| B. | m3/min |
| C. | m3/h |
| D. | none of these |
| Answer» A. m3/s | |
| 394. |
Irrigation is said to be a science of survival. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 395. |
According to Lacey |
| A. | the silt is kept in suspension due to the force of vertical eddies |
| B. | the eddies are generated from bed and sides, both normal to the surface of generation |
| C. | the vertical component of eddies generated from sides will also support the silt |
| D. | all of the above |
| Answer» D. all of the above | |
| 396. |
The height of dowel above the road level should not be more than |
| A. | 10 cm |
| B. | 20 cm |
| C. | 30 cm |
| D. | 40 cm |
| Answer» C. 30 cm | |
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