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.
| 101. |
The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are |
| A. | At right angle and parallel to weir crest |
| B. | Parallel and at right angle to weir crest |
| C. | Parallel to weir crest in both |
| D. | At right angle to weir crest in both |
| Answer» B. Parallel and at right angle to weir crest | |
| 102. |
The state of the soil when plants fail to extract sufficient water for their requirements, is |
| A. | Maximum saturated point |
| B. | Permanent wilting point |
| C. | Ultimate utilization point |
| D. | None of these |
| Answer» E. | |
| 103. |
Useful soil moisture for plant growth, is |
| A. | Capillary water |
| B. | Gravity water |
| C. | Hygroscopic water |
| D. | Chemical water |
| Answer» B. Gravity water | |
| 104. |
In case of a trapezoidal notch fall |
| A. | Top length of the piers should not be less than their thickness |
| B. | Splay upstream from the notch section is 45° |
| C. | Splay downstream from the notch section is 22½° |
| D. | All the above |
| Answer» E. | |
| 105. |
Solution of Laplacian equation in three dimensions d²φ/dx² + d²φ/dy² + d²φ/dz² = 0 of water in a syphon, is done by |
| A. | Analytical method |
| B. | Khosla's method |
| C. | Method of relaxation |
| D. | Unwin's method |
| Answer» D. Unwin's method | |
| 106. |
According to Kennedy, the critical velocity (V₀) in meters in a channel is the mean velocity which keeps the channel free from silting or scouring. Its value is given by (where m is critical velocity ratio and D is the depth of the channel). |
| A. | V₀ = 0.84 mD0.64 |
| B. | V₀ = 0.55 mD0.64 |
| C. | V₀ = 0.84 mD0.54 |
| D. | V₀ = 0.55 mD0.54 |
| Answer» C. V₀ = 0.84 mD0.54 | |
| 107. |
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» D. none of the above | |
| 108. |
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 | |
| 109. |
A river training work is generally required when the river is |
| A. | Meandering |
| B. | Aggrading |
| C. | Degrading |
| D. | All the above |
| Answer» B. Aggrading | |
| 110. |
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. | |
| 111. |
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 m3/sec |
| B. | 25 m3/sec |
| C. | 30 m3/sec |
| D. | 35 m3/sec |
| Answer» C. 30 m3/sec | |
| 112. |
Fundamental momentum equation for a hydraulic jump, is |
| A. | D₁² - D₂² = (2q/g) × (V₁ - V₂) |
| B. | D₂² - D₁² = (2q/g) × (V - V₂) |
| C. | D₁² - D₂² = (2q/g) × (V₂ - V₁) |
| D. | D₁² + D₂² = (2q/g) × (V₂ - V₁) |
| Answer» C. D₁² - D₂² = (2q/g) × (V₂ - V₁) | |
| 113. |
If L is total length of a canal in kilometers, P is total perimeter of its lining in metres and C is the cost of lining per square metre, the additional expenditure involved on lining, is |
| A. | 100 PLC |
| B. | PLC/1000 |
| C. | PL/1000C |
| D. | PC/100L |
| Answer» B. PLC/1000 | |
| 114. |
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. | |
| 115. |
If A is the area of the surface, x̅ is the depth of its C.G. from the surface of the water and ω is the density of water, then |
| A. | Total pressure on the surface is equal to ωx̅ |
| B. | Depth of the point at which total pressure acts is equal to its moment of inertia divided by Ax̅ |
| C. | Depth of the centre of pressure is 2/3H vertically below the surface |
| D. | All the above |
| Answer» E. | |
| 116. |
Coefficient of discharge of an ogee spillway |
| A. | depends on depth of approach and upstream slope |
| B. | depends on downstream apron interference and downstream submergence |
| C. | remains constant |
| D. | both (A) and (B) |
| Answer» E. | |
| 117. |
Which of the following spillways is least suitable for an earthen dam ? |
| A. | ogee spillway |
| B. | chute spillway |
| C. | side channel spillway |
| D. | shaft spillway |
| Answer» B. chute spillway | |
| 118. |
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 | |
| 119. |
For a unique design of a channel by Kennedy's theory |
| A. | Its breadth must only be known |
| B. | Its depth must only be known |
| C. | Its breadth and depth ratio must only be known |
| D. | All the above |
| Answer» D. All the above | |
| 120. |
An artesian aquifer is the one where |
| A. | water surface under the ground is at atmospheric pressure |
| B. | water is under pressure between two impervious strata |
| C. | water table serves as upper surface of zone of saturation |
| D. | none of the above |
| Answer» C. water table serves as upper surface of zone of saturation | |
| 121. |
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. | |
| 122. |
A hydraulic jump is generally formed when a stream moving with |
| A. | A hyper-critical velocity meets a stream moving with a critical velocity |
| B. | A hyper-critical velocity meets a stream moving with a hyper-critical velocity |
| C. | A hyper-critical velocity meets a stream moving with a sub-critical velocity |
| D. | A sub-critical velocity meets a stream moving with a hyper-critical velocity |
| Answer» D. A sub-critical velocity meets a stream moving with a hyper-critical velocity | |
| 123. |
If the intensity of rainfall is more than the infiltration capacity of soil, then the infiltration rate will be |
| A. | equal to rate of rainfall |
| B. | equal to infiltration capacity |
| C. | more than rate of rainfall |
| D. | more than infiltration capacity |
| Answer» C. more than rate of rainfall | |
| 124. |
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. | |
| 125. |
For designing the venturi head, |
| A. | Width of the throat should not be less than one-third of the bed width of main canal |
| B. | Length of the throat should be 2.5 times the depth measured to F.S.L. in the main canal |
| C. | Minimum throat width should not be less than 60 cm |
| D. | All the above |
| Answer» E. | |
| 126. |
Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas.Reason R : Rainfall gradient is steep.Select your correct answer according to the coding system given below : |
| A. | Both A and R are true and R is the correct explanation of A |
| B. | Both A and R are true but R is not the correct explanation of A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» B. Both A and R are true but R is not the correct explanation of A | |
| 127. |
In case of non-availability of space due to topography, the most suitable spillway is |
| A. | straight drop spillway |
| B. | shaft spillway |
| C. | chute spillway |
| D. | ogee spillway |
| Answer» C. chute spillway | |
| 128. |
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 | |
| 129. |
F.S.L. of a canal at its head with respect to parent channel is kept |
| A. | At the same level |
| B. | 15 cm lower |
| C. | 15 cm higher |
| D. | None of these |
| Answer» C. 15 cm higher | |
| 130. |
The level of the floor of a syphon aqueduct can be obtained |
| A. | By subtracting the depth of the culvert from the canal bed level |
| B. | By subtracting the thickness of culvert plus the depth of the culvert from the canal bed level |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» C. Both (A) and (B) | |
| 131. |
A land is said to be water-logged if its soil pores within |
| A. | A depth of 40 cm are saturated |
| B. | A depth of 50 cm are saturated |
| C. | Root zone of the crops are saturated |
| D. | All the above |
| Answer» D. All the above | |
| 132. |
The field capacity of a soil depends upon |
| A. | Capillary tension in soil |
| B. | Porosity of soil |
| C. | Both (A) and (B) |
| D. | Neither (A) nor (B) |
| Answer» D. Neither (A) nor (B) | |
| 133. |
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. | |
| 134. |
If V₀ is the critical velocity of a channel, its silt transporting power, according to Kennedy, is proportional to |
| A. | V₀1/2 |
| B. | V₀3/2 |
| C. | V₀5/2 |
| D. | V₀7/2 |
| Answer» D. V₀7/2 | |
| 135. |
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 | |
| 136. |
To hold hydraulic jumps, baffle walls are provided in |
| A. | Sarda type falls |
| B. | English type falls |
| C. | Montague type falls |
| D. | Vertical type falls |
| Answer» C. Montague type falls | |
| 137. |
Canals taken off from ice-fed perennial rivers, are known |
| A. | Permanent canals |
| B. | Ridge canals |
| C. | Perennial canals |
| D. | Inundation canals |
| Answer» D. Inundation canals | |
| 138. |
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» C. does not change the water logging area | |
| 139. |
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 | |
| 140. |
The useful storage is the volume of water stored in the reservoir between |
| A. | minimum pool level and maximum pool level |
| B. | minimum pool level and normal pool level |
| C. | normal pool level and maximum pool level |
| D. | river bed and minimum pool level |
| Answer» C. normal pool level and maximum pool level | |
| 141. |
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. | |
| 142. |
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» D. Discharge and time in chronological order | |
| 143. |
According to Lacey, in regime conditions |
| A. | Silt is kept in suspension by vertical components of eddies |
| B. | Entire cross-section of the channel is generated at all points by the forces normal to the wetted perimeter |
| C. | Both (A) and (B) |
| D. | Neither (A) nor (B) |
| Answer» D. Neither (A) nor (B) | |
| 144. |
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 | |
| 145. |
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» B. Storm characteristics only | |
| 146. |
An aggrading river is a |
| A. | silting river |
| B. | scouring river |
| C. | both silting and scouring river |
| D. | neither silting nor scouring river |
| Answer» B. scouring river | |
| 147. |
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. | |
| 148. |
The sinuosity of a meander is the ratio of |
| A. | Meander length and the width of meander |
| B. | Meander length and half width of the river |
| C. | Curved length and the straight distance |
| D. | None of these |
| Answer» D. None of these | |
| 149. |
The intensity of irrigation means |
| A. | Percentage of culturable commanded area to be irrigated annually |
| B. | Percentage of gross commanded area to be irrigated annually |
| C. | Percentage of the mean of culturable commanded area and the gross commanded area to be irrigated annually |
| D. | Total depth of water supplied by the number of waterings |
| Answer» B. Percentage of gross commanded area to be irrigated annually | |
| 150. |
For wave action in dams, the maximum height of freeboard is generally taken to be equal to (where hw is height of wave.) |
| A. | 0.5 hw |
| B. | 0.75 hw |
| C. | 1.25 hw |
| D. | 1.50 hw |
| Answer» E. | |