MCQOPTIONS
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MCQOPTIONS
This section includes 169 Mcqs, each offering curated multiple-choice questions to sharpen your Hazardous Waste Management knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The general value of lift for concrete is taken as __________________ |
| A. | 1.5 m |
| B. | 2.5 m |
| C. | 3 m |
| D. | 4 m |
| Answer» B. 2.5 m | |
| 52. |
Which type of dam is suitable on shallow pervious foundations? |
| A. | Zoned embankment type |
| B. | Homogenous embankment type |
| C. | Both Non-homogenous type and homogenous type |
| D. | Diaphragm type |
| Answer» B. Homogenous embankment type | |
| 53. |
The base width of a rock-fill dam in comparison to that of an earthen dam is _______________ |
| A. | much larger |
| B. | much smaller |
| C. | sometimes large sometimes smaller |
| D. | almost equal |
| Answer» C. sometimes large sometimes smaller | |
| 54. |
Which of the following dam requires no reinforcement? |
| A. | Fixed deck buttress dam |
| B. | Simple deck buttress dam |
| C. | Cantilever deck buttress dam |
| D. | Massive head buttress dam |
| Answer» E. | |
| 55. |
The axis of a gravity dam is the ______________________ |
| A. | line of the crown of the dam on the downstream side |
| B. | line of the crown of the dam on the upstream side |
| C. | centre-line of the top width of the dam |
| D. | line joining mid-points of the base |
| Answer» C. centre-line of the top width of the dam | |
| 56. |
Presence of tail-water in a gravity dam ____________________ |
| A. | increases the principal stress and decreases the shear stress |
| B. | increases both the principal stress and the shear stress |
| C. | decreases the principal stress and increases the shear stress |
| D. | decreases both the principal stress and the shear stress |
| Answer» E. | |
| 57. |
In order to prevent the possibility of the cross-flow towards the earthen embankments, it is necessary to provide _____________________ |
| A. | counter berms |
| B. | sides walls of sufficient height and length |
| C. | spoil banks |
| D. | sufficient freeboard |
| Answer» C. spoil banks | |
| 58. |
Which of the following attempts are made to reduce the uplift in order to economize on the provided section of a concrete gravity dam?i. Providing drainage gallery to collect seepage waterii. Constructing cut-off under upstream faceiii. Pressure grouting in dam foundationiv. Provision of shear keys or keyways |
| 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 | |
| 59. |
In a simple deck slab buttress dam of a given height, the buttress spacing can be increased by increasing the upstream slope. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 60. |
In order to keep the saturation line in a canal embankment well within the toe, it is necessary to provide _____________________ |
| A. | spoil bank |
| B. | counter berm |
| C. | freeboard |
| D. | berm |
| Answer» C. freeboard | |
| 61. |
What is suggested massiveness factor for simply supported RCC Decks? |
| A. | 2.5 to 3 |
| B. | 3 to 4.5 |
| C. | 4.5 to 7.5 |
| D. | 7.5 to 12 |
| Answer» B. 3 to 4.5 | |
| 62. |
If the uplift increases and the net effective downward force reduces, the resultant will shift towards the toe. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 63. |
Calculate the value of minimum base width for an elementary triangular concrete gravity dam supporting 72 m height of reservoir water and full uplift? (Take specific gravity of concrete as 2.4 and coefficient of friction as 0.7) |
| A. | 36.28 m |
| B. | 39.77 m |
| C. | 51.5 m |
| D. | 73.5 m |
| Answer» E. | |
| 64. |
For usual values of permissible compressive stress and specific gravity of concrete, a high concrete gravity is the one whose height exceeds ______________ |
| A. | 48 m |
| B. | 70 m |
| C. | 88 m |
| D. | 98 m |
| Answer» D. 98 m | |
| 65. |
When the reservoir is empty, the maximum vertical stress equal to ________________ |
| A. | At heel = 2W/B and at toe = 0 |
| B. | At heel = 0 and at toe = 2W/B |
| C. | At heel = toe = zero |
| D. | At heel = toe = 2W/B |
| Answer» B. At heel = 0 and at toe = 2W/B | |
| 66. |
The bottom portion of a concrete or a masonry gravity dam is usually stepped in order to _______ |
| A. | increase the overturning resistance of the dam |
| B. | increase the shear strength |
| C. | decrease the shear strength |
| D. | increase the frictional resistance |
| Answer» C. decrease the shear strength | |
| 67. |
The governing compressive stress in a concrete gravity dam which should not be allowed to exceed the permissible value of about 3000 KN/m² while analyzing full reservoir case is ____________________ |
| A. | the vertical maximum stress at the toe |
| B. | the major principal stress at toe |
| C. | the shear stress at the toe |
| D. | the principal stress at the heel |
| Answer» C. the shear stress at the toe | |
| 68. |
What is the maximum permissible tensile stress for high concrete gravity dam under worst conditions? |
| A. | 500 KN/m² |
| B. | 500 kg/cm² |
| C. | 5 kg/m² |
| D. | 50 KN/m² |
| Answer» B. 500 kg/cm² | |
| 69. |
Which failure occurs when the net horizontal force above any plane in the dam or at the base of the dam exceeds the frictional resistance developed at that level? |
| A. | Overturning |
| B. | Crushing |
| C. | Sliding |
| D. | By development of tension |
| Answer» D. By development of tension | |
| 70. |
Which failure occurs when the minimum stress exceeds the allowable compressive stress of the dam material? |
| A. | Overturning |
| B. | Crushing |
| C. | Sliding |
| D. | By development of tension |
| Answer» C. Sliding | |
| 71. |
The two-dimensional stability analysis of gravity dams proves better for U-shaped valleys than for V-shaped valleys. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 72. |
Which of the following method is also called as the Slices method? |
| A. | Fellenius method |
| B. | Swedish slip circle method |
| C. | Bishop’s simplified method |
| D. | Spencer’s method |
| Answer» C. Bishop’s simplified method | |
| 73. |
Which of the following dam is also known as the Amberson dam? |
| A. | Multiple arch buttress dam |
| B. | Mushroom head buttress dam |
| C. | Massive head buttress dam |
| D. | Free deck buttress dam |
| Answer» E. | |
| 74. |
According to Terzaghi, the ratio of D₁₅ of filter to D₁₅ of base material should be _____________ |
| A. | > 5 |
| B. | < 4 |
| C. | 4 to 5 |
| D. | < 5 |
| Answer» D. < 5 | |
| 75. |
Calculate the value of free-board that should be provided for a reservoir having a wind velocity of 92 km/h and it extends up to 18 km upstream. |
| A. | 1.2 m |
| B. | 1.6 m |
| C. | 2.25 m |
| D. | 2.5 m |
| Answer» D. 2.5 m | |
| 76. |
A rock toe and a horizontal filter is provided on the downstream base of an earthen dam in order to _________________ |
| A. | prevent piping action in the dam body |
| B. | prevent piping action in the dam foundation |
| C. | reduce the seepage quantity by blocking its flow |
| D. | collect and drain out the seepage flow |
| Answer» E. | |
| 77. |
Leakage through the transverse joints in a gravity dam is prevented by ____________ |
| A. | shear keys |
| B. | keyways |
| C. | water stops |
| D. | galleries |
| Answer» D. galleries | |
| 78. |
Which of the following soil material is most preferred for the central core material of zoned embankment type dam? |
| A. | Highly impervious clay |
| B. | Sands or silty clays |
| C. | Coarse sands |
| D. | Gravels |
| Answer» C. Coarse sands | |
| 79. |
The vertical downward earthquake acceleration aᵥ = 0.1g acting on a gravity dam will ________________________ |
| A. | increase the resisting weight of the dam by 10% |
| B. | decrease the resisting weight of the dam by 10% |
| C. | increase the uplift by 10% |
| D. | decrease the uplift by 10% |
| Answer» C. increase the uplift by 10% | |
| 80. |
What is the suggested slenderness ratio for simply supported RCC decks? |
| A. | 4.5 to 7.5 |
| B. | 7.5 to 12 |
| C. | 12 to 15 |
| D. | 15 to 18 |
| Answer» D. 15 to 18 | |
| 81. |
During the maintenance of an earthen dam, the apparent seepage through the foundation of the dam is best taken care of by providing ______________________ |
| A. | chimney drain |
| B. | rock toe |
| C. | drain trench along the downstream toe |
| D. | upstream impervious cut-off |
| Answer» D. upstream impervious cut-off | |
| 82. |
A gravity dam is subjected to hydrodynamic pressure caused by __________ |
| A. | the rising waves of the reservoir when a flood wave enters into it |
| B. | the rising waves in the reservoir due to high winds |
| C. | the increase in water pressure momentarily caused by the horizontal earthquake acting towards the reservoir |
| D. | the increase in water pressure momentarily caused by the horizontal earthquake acting towards the dam |
| Answer» D. the increase in water pressure momentarily caused by the horizontal earthquake acting towards the dam | |
| 83. |
What is the U.S.B.R recommended value for freeboard when the height of the dam is more than 60 m? |
| A. | 2 m to 3 m |
| B. | 2.5 m above the top of gates |
| C. | 3 m above the top of gates |
| D. | More than 3 m |
| Answer» D. More than 3 m | |
| 84. |
Tension cracks in the dam may sometimes lead to the failure of the structure by? |
| A. | Sliding of the dam at the cracked section |
| B. | Overturning about the toe |
| C. | Crushing of concrete starting from the toe |
| D. | Both overturning and crushing |
| Answer» D. Both overturning and crushing | |
| 85. |
Which among the following is not an assumption of the ‘Trial Load Analysis’ method of design of arch dams? |
| A. | Plane sections normal to the axis remain plane after flexure |
| B. | Any horizontal arch ring is independent of the arch rings below and above |
| C. | Modulus of elasticity of concrete and rock foundation is equal for compression and tension |
| D. | Stresses are proportional to strains |
| Answer» C. Modulus of elasticity of concrete and rock foundation is equal for compression and tension | |
| 86. |
On moderate foundations and particularly in seismic areas, the type of dam which can preferably be considered for construction is ___________________ |
| A. | masonry gravity dam |
| B. | earthen dam |
| C. | rock-fill dam |
| D. | arch dam |
| Answer» D. arch dam | |
| 87. |
Which of the following component of a buttress dam is also called counterfort? |
| A. | Corbel |
| B. | Buttress |
| C. | Lateral brace |
| D. | Sloping deck |
| Answer» C. Lateral brace | |
| 88. |
Which embankment has the thickness of the diaphragm at an elevation less than 10 meters or the height of the embankment above the corresponding elevation? |
| A. | Diaphragm type dam |
| B. | Zoned type dam |
| C. | Non-homogenous earth dam |
| D. | Homogenous earth dam |
| Answer» B. Zoned type dam | |
| 89. |
The thin cylinder theory for designing arch dams is based only on ___________________ |
| A. | temperature stresses |
| B. | ice pressures |
| C. | yield stresses |
| D. | hydrostatic water pressure |
| Answer» E. | |
| 90. |
Greater is the afflux, lesser will be the available clearance for the same deck level. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 91. |
Greater is the reduction in the linear waterway, the lesser is the afflux. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 92. |
The average grain size of the bed material is 0.16 mm for medium silt, Lacey’s silt factor is likely to be _______ |
| A. | 0.30 |
| B. | 0.45 |
| C. | 0.70 |
| D. | 1.32 |
| Answer» D. 1.32 | |
| 93. |
The waterway for a bridge on the river in alluvial plain having a dominant discharge of 3600 cumecs should be ________ m. |
| A. | 250 m |
| B. | 285 m |
| C. | 300 m |
| D. | 225 m |
| Answer» C. 300 m | |
| 94. |
In Broad Crested Weir formula, the discharge is dependent on ________________ |
| A. | upstream water depth only |
| B. | downstream water depth only |
| C. | both upstream and downstream water depth |
| D. | independent of both U/s and D/s water depth |
| Answer» B. downstream water depth only | |
| 95. |
The greater is the heading up of water at the inlet end, the greater will be the flow velocity in case of culvert across some flat terrain. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 96. |
The foundations of bridges on erodible beds are taken down below the HFL by an amount equal to _____________ |
| A. | 4/3 times the maximum scour depth |
| B. | 2/3 times the maximum scour depth |
| C. | 1.5 times the maximum scour depth |
| D. | 2 times the maximum scour depth |
| Answer» B. 2/3 times the maximum scour depth | |
| 97. |
The relation between the scour depth (R) and Regime scour depth (Rₑ) for an alluvial river having regime width (W) and contracted width (B) is given by ______ |
| A. | R = Rₑ (W/B)^0.61 |
| B. | R = Rₑ (B/W)^0.61 |
| C. | R = Rₑ (W/B)^0.33 |
| D. | R = Rₑ (W/B)^0.33 |
| Answer» B. R = Rₑ (B/W)^0.61 | |
| 98. |
A road bridge is proposed to be constructed across an alluvial stream with the estimated design discharge as 2500 m³/s. It is decided to adopt a total effective waterway equal to 300 m for this bridge as against the regime width of 237.5 m due to afflux considerations. If the HFL at the site is at RL 214 m, then the RL of the open foundation can be suggested as _______ |
| A. | 206.6 m |
| B. | 208.5 m |
| C. | 207.2 m |
| D. | 210.2 m |
| Answer» B. 208.5 m | |
| 99. |
Culverts are all those road bridges whose spans are up to ________ |
| A. | 6 m |
| B. | 8 m |
| C. | 10 m |
| D. | 12 m |
| Answer» C. 10 m | |
| 100. |
The horizontal component of an earthquake wave producing instability in a dam is the one which acts __________________ |
| A. | towards the reservoir |
| B. | towards the dam |
| C. | away from the reservoir |
| D. | away from the dam |
| Answer» B. towards the dam | |