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.
| 401. |
_Under the same conditions, which of the following shapes of water surface will give the highest rate of evaporation ?$? |
| A. | flat water surface |
| B. | convex water surface |
| C. | concave water surface |
| D. | independent of shape of water surface |
| Answer» C. concave water surface | |
| 402. |
_A river is said to be of$? |
| A. | Aggrading type if it builds up its bed to a certain slope |
| B. | Degrading type if it cuts its bed to a certain slope |
| C. | Meandering type if it flows in sinuous curve |
| D. | All the above |
| Answer» E. | |
| 403. |
_The amount of irrigation water required to meet the evapotranspiration needs of the crop during its full growth is called$? |
| A. | effective rainfall |
| B. | consumptive use |
| C. | consumptive irrigation requirement |
| D. | net irrigation requirement |
| Answer» D. net irrigation requirement | |
| 404. |
_The uplift pressure on the roof of an inverted syphon, is maximum when$? |
| A. | Drain in running dry |
| B. | Canal is running dry |
| C. | Canal is running with F.S.L. |
| D. | Drain is running with H.F.L. |
| Answer» E. | |
| 405. |
In a concrete canal the approximate permissible velocity of water should not exceed$? |
| A. | 0.5 m/sec |
| B. | 1 m/sec |
| C. | 1.5 m/sec |
| D. | 2 m/sec |
| Answer» E. | |
| 406. |
The normal annual precipitation at stations X, A, B and C are 700 mm, 1000 mm, 900 mm and 800 mm respectively. If the storm precipitation at three station A, B and C were 100 mm, 90 mm and 80 mm respectively, then the storm precipitation for station X will be$? |
| A. | 70mm |
| B. | 80mm |
| C. | 90 mm |
| D. | 105 mm |
| Answer» B. 80mm | |
| 407. |
While deciding the alignment of a proposed canal taking off from a river at B, three alignments of approximately equal lengths are available. These cross a drainages at C1, C2 and C3 where drainage bed levels C1 > C2 > C3, you will provide at site C3$? |
| A. | An aqueduct |
| B. | A syphon aqueduct |
| C. | A super passage |
| D. | A syphon |
| Answer» B. A syphon aqueduct | |
| 408. |
The Lacey's regime velocity is proportional to$? |
| A. | R1/2 S3/4 |
| B. | Q3/4 S1/3 |
| C. | R3/4 S1/3 |
| D. | R2/3 S1/2 |
| Answer» D. R2/3 S1/2 | |
| 409. |
The major resisting force in a gravity dam is$? |
| A. | water pressure |
| B. | wave pressure |
| C. | self-weight of dam |
| D. | uplift pressure |
| Answer» D. uplift pressure | |
| 410. |
A water-logged land is found suitable for cultivation due to$? |
| A. | Ease of tillage for preparation of the field for optimum condition of germination |
| B. | Absence of aeration of soil from root zone of the plant |
| C. | Regular supply of water to plants from the water table by capillary action |
| D. | None of these |
| Answer» E. | |
| 411. |
According to Khosla, the exits gradient of surface flow$? |
| A. | Depends upon the b/d ratio |
| B. | Is independent of the b/d ratio |
| C. | Is independent of the depths of d/s cut off walls |
| D. | None of these |
| Answer» B. Is independent of the b/d ratio | |
| 412. |
For the stability of a structure against seepage pressure according to Khosla's creep theory, the critical gradient is$? |
| A. | Zero |
| B. | 0.25 |
| C. | 0.50 |
| D. | 1.00 |
| Answer» E. | |
| 413. |
The field capacity of a soil is 25%, its permanent wilting point is 15% and specific dry unity weight is 1.5. If the depth of root zone of a crop, is 80 cm, the storage capacity of the soil, is$? |
| A. | 8 cm |
| B. | 10 cm |
| C. | 12 cm |
| D. | 14 cm |
| Answer» D. 14 cm | |
| 414. |
According to Bligh's creep theory, percolating water flows along$? |
| A. | Straight path under the foundation of the dam |
| B. | Circular path under the foundation of the dam |
| C. | The outline of the base of the foundation of the dam |
| D. | None of these |
| Answer» E. | |
| 415. |
Dimensions of coefficient of transmissibility are$? |
| A. | M°L°T° |
| B. | rvfL’T”1 |
| C. | M° L2 T1 |
| D. | M’LV |
| Answer» D. M‚Äö√Ñ√¥LV | |
| 416. |
The saturation line is the line up to which banks get saturated after the canal runs for some time. The saturation gradient in ordinary loam soil, is generally$? |
| A. | 2 : 1 |
| B. | 3 : 1 |
| C. | 4 : 1 |
| D. | 5 : 1 |
| Answer» D. 5 : 1 | |
| 417. |
Infiltration rate is always$? |
| A. | more than the infiltration capacity |
| B. | less than the infiltration capacity |
| C. | equal to or less than the infiltration capacity |
| D. | equal to or more than the infiltration capacity |
| Answer» D. equal to or more than the infiltration capacity | |
| 418. |
For a flood control reservoir, the effective storage is equal to$? |
| 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. | |
| 419. |
In India, which of the following is adopted as standard recording rain-gauge?$? |
| A. | Symon’s rain-gauge |
| B. | Tipping bucket type |
| C. | Natural siphon type |
| D. | Weighing bucket type |
| Answer» D. Weighing bucket type | |
| 420. |
If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle θ with horizontal, the perimeter of the canal is$? |
| A. | R (θ + tan θ) |
| B. | 2R (θ + tan θ) |
| C. | R (θ + cos θ) |
| D. | 2R (θ + cos θ) |
| Answer» E. | |
| 421. |
Generally the weir is aligned at right angles to the direction of the main river current because$? |
| A. | It ensures less length of the weir |
| B. | It gives better discharging capacity |
| C. | It is economical |
| D. | All of the above |
| Answer» E. | |
| 422. |
The maximum average depth due to one day storm over an area of 100 km2 is 100 mm. Depth-Area-Duration (DAD) curves indicate that for the same area of 100 km2 the maximum average depth for a 3 hour storm will be$? |
| A. | 100 mm |
| B. | more than 100 mm |
| C. | less than 100 mm |
| D. | none of the above |
| Answer» C. less than 100 mm | |
| 423. |
If the optimum depth of kor watering for a crop is 15.12 cm, the outlet factor for the crop for four week period in hectares per cumec, is$? |
| A. | 1000 |
| B. | 1200 |
| C. | 1400 |
| D. | 1600 |
| Answer» E. | |
| 424. |
Infiltration capacity$? |
| A. | is a constant factor |
| B. | changes with time |
| C. | changes with location |
| D. | changes with both time and location |
| Answer» E. | |
| 425. |
Which one of the following statements is correct?$? |
| A. | The canal system and the drainage system are complementary |
| B. | The canal system runs on ridges, gets divided into smaller channels and spreads its water on the land |
| C. | The drainage system runs along the lowest line, collects drainage water from the slopes and joins the main stream |
| D. | All the above |
| Answer» E. | |
| 426. |
The most suitable location of a canal head work, is$? |
| 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. | |
| 427. |
According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is$? |
| A. | 1.25 D |
| B. | 1.50 D |
| C. | 1.75 D |
| D. | 2.00 D |
| Answer» E. | |
| 428. |
In a syphon aqueduct$? |
| A. | Drainage passes over the canal and F.S.L. of the canal is below the bottom of the drainage trough |
| B. | Drainage passes over the canal and F.S.L. of the canal is above the bottom of the drainage trough |
| C. | Canal passes over the drainage and H.F.L. of the drainage is above the bottom of the canal trough |
| D. | Canal passes over the drainage and H.F.L. of the drainage is below the bottom of the canal trough |
| Answer» D. Canal passes over the drainage and H.F.L. of the drainage is below the bottom of the canal trough | |
| 429. |
As compared to gravity dams, earthen dams$? |
| A. | are costlier |
| B. | are less susceptible to failure |
| C. | require sound rock foundations |
| D. | require less skilled labour |
| Answer» E. | |
| 430. |
If D is the depth of water upstream of the throat above its sill, B is the width of the throat, to achieve critical flow in an open venturi flume, the theoretical maximum flow Q, is$? |
| A. | Q = 1.71 BD1/2 |
| B. | Q = 1.71 BD |
| C. | Q = 1.71 BD3/2 |
| D. | Q = 1/71 BD2/3 |
| Answer» D. Q = 1/71 BD2/3 | |
| 431. |
Which of the following types of rain gauges is used for measuring rain in remote hilly inaccessible areas ?$? |
| A. | tipping bucket type |
| B. | weighing type |
| C. | floating type |
| D. | Simon’s raingauge |
| Answer» B. weighing type | |
| 432. |
The uplift pressure on the face of a drainage gallery in a dam is taken as$? |
| A. | hydrostatic pressure at toe |
| B. | average of hydrostatic pressure at toe and heel |
| C. | two-third of hydrostatic pressure at toe plus one-third of hydrostatic pressure at heel |
| D. | none of the above |
| Answer» D. none of the above | |
| 433. |
Which of the following types of falls use parabolic glacis for energy dissipation ?$? |
| A. | vertical drop fall |
| B. | glacis fall |
| C. | Montague type fall |
| D. | inglis fall |
| Answer» D. inglis fall | |
| 434. |
A straight glacis type fall with a baffle platform and a baffle wall is called$? |
| A. | Vertical drop-fall |
| B. | Glacis fall |
| C. | Montague type fall |
| D. | Inglis fall |
| Answer» E. | |
| 435. |
Interception losses are due toi) evaporationii) transpirationiii) stream flowThe correct answer is$? |
| A. | only (i) |
| B. | (i)and(ii) |
| C. | (ii) and (iii) |
| D. | (i), (ii) and (iii) |
| Answer» B. (i)and(ii) | |
| 436. |
A hydroelectric scheme operating under a head of 80 m will be classified as$? |
| A. | low head scheme |
| B. | medium head scheme |
| C. | high head scheme |
| D. | none of the above |
| Answer» D. none of the above | |
| 437. |
The rainfall on five successive days were measured as 100 mm, 80 mm, 60 mm, 40 mm and 20 mm respectively. If the infiltration index or the storm loss rate for the catchment area is earlier estimated as 50 mm/day, the total surface run off will be$? |
| A. | 50 mm |
| B. | 60 mm |
| C. | 90 mm |
| D. | 140 mm |
| Answer» D. 140 mm | |
| 438. |
The main function of a divide wall is to$? |
| A. | control the silt entry in the canal |
| B. | prevent river floods from entering the canal |
| C. | separate the undersluices from weir proper |
| D. | provide smooth flow at sufficiently low velocity |
| Answer» D. provide smooth flow at sufficiently low velocity | |
| 439. |
The measure to remove water logging of land, is$? |
| A. | To reduce percolation from canals and water courses |
| B. | To increase outflow from the ground water reservoir |
| C. | Both (A) and (B) |
| D. | Neither (A) nor (B) |
| Answer» D. Neither (A) nor (B) | |
| 440. |
Infiltration is the$? |
| A. | movement of water through the soil |
| B. | absorption of water by soil surface |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» B. absorption of water by soil surface | |
| 441. |
If B and d are the bed width and depth of a channel in meters, the combined losses due to evaporation and seepage in cumecs per kilometer length of the channel, is$? |
| A. | (1/50) √ó (B + d)2/3 |
| B. | (1/100) √ó (B + d)2/3 |
| C. | (1/150) √ó (B + d)2/3 |
| D. | (1/200) √ó (B + d)2/3 |
| Answer» E. | |
| 442. |
Meandering of a river generally occurs, in$? |
| A. | Rocky stage |
| B. | Delta stage |
| C. | Boulder stage |
| D. | Trough stage |
| Answer» E. | |
| 443. |
If D is the depth of scour below original bed, then the width of launching apron is generally taken as$? |
| A. | 1.2 D |
| B. | 1.5 D |
| C. | 2.0 D |
| D. | 2.5 D |
| Answer» C. 2.0 D | |
| 444. |
To estimate the magnitude of a flood with a return period of T years, Gumbel’s distribution method requires the following data pertaining to annual flood seriesi) mean valueii) standard deviationiii) length of recordiv) coefficient of skewThe correct answer is$? |
| A. | (i) and (ii) |
| B. | (i),(ii) and (iii) |
| C. | (i), (ii) and (iv) |
| D. | (i), (ii), (iii) and (iv) |
| Answer» C. (i), (ii) and (iv) | |
| 445. |
Horizontal acceleration due to earthquake results in$? |
| A. | hydrodynamic pressure |
| B. | inertia force into the body of the dam |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» D. none of the above | |
| 446. |
When a canal is carried over a natural drainage, the structure provided, is known as$? |
| A. | Syphon |
| B. | Aqueduct |
| C. | Super passage |
| D. | Syphon-aqueduct |
| Answer» C. Super passage | |
| 447. |
The main cause of silting up a channel,$? |
| A. | Non-regime section |
| B. | Inadequate slope |
| C. | Defective head regulator |
| D. | All the above |
| Answer» E. | |
| 448. |
For a catchment area of 120 km2, the equilibrium discharge in m3/hour of an S-curve obtained by the summation of 6 hour unit hydro graph is$? |
| A. | 0.2 x 106 |
| B. | 0.6 x 106 |
| C. | 2.4 xlO6 |
| D. | 7.2 xlO6 |
| Answer» B. 0.6 x 106 | |
| 449. |
The top of the capillary zone$? |
| A. | Lies below the water table at every point |
| B. | Lies above the water table at every point |
| C. | Coincides the water table at every point |
| D. | None of these |
| Answer» C. Coincides the water table at every point | |
| 450. |
Pick up the incorrect statement from the following? |
| A. | Side walls of a venturi head flume are splayed out from the end of the throat at 1 : 10 for a length of 4.5 m |
| B. | Length of side walls should be such that the width of the flume is made equal to 2/3rd the bed width of the distributary |
| C. | Once the width of the flume becomes 2/3rd of the width of the distributary, the splayed walls are increased to 1 in 3 to get full bed width |
| D. | None of these |
| Answer» E. | |