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.
| 101. |
The central core of the zoned embankment type earth dam ________________________ |
| A. | checks the seepage |
| B. | prevents piping |
| C. | gives stability to the central impervious fill |
| D. | distribute the load over a large area |
| Answer» B. prevents piping | |
| 102. |
Which of the following theory is the most accurate method to design arch? |
| A. | The thin cylinder theory |
| B. | The theory of elastic arches |
| C. | The trial load method |
| D. | Creep theory |
| Answer» D. Creep theory | |
| 103. |
Multiple arch dams are generally used for ______________ |
| A. | high heights |
| B. | low heights |
| C. | medium heights |
| D. | any height |
| Answer» B. low heights | |
| 104. |
The major principal stress at the toe of a gravity dam under full reservoir condition neglecting the tailwater effect is given by ____________________ |
| A. | Pᵥ |
| B. | Pᵥ tanQ² |
| C. | Pᵥ secQ² |
| D. | Pᵥ sinQ² |
| Answer» D. Pᵥ sinQ² | |
| 105. |
The buttresses of a free deck buttress dam are provided at ‘x’ m clear spacing and buttress thickness is proposed to be ‘t’ m. The buttress section can then be designed like the section of a concrete gravity dam by considering the effective unit weight of water = Surcharge factor (S) x actual unit weight of water. The value of this surcharge factor is given as _____________ |
| A. | S = (x + t)/x |
| B. | S = (x + t)/t |
| C. | S = (x + t)/(x + 1) |
| D. | S = (x + t)/(t + 1) |
| Answer» C. S = (x + t)/(x + 1) | |
| 106. |
The Lacey’s scour depth R given by equation R = 0.473 (Q/f)^1/3 is applicable when the river width is equal to ___________ |
| A. | actual river width |
| B. | regime width |
| C. | any contracted width |
| D. | span length |
| Answer» C. any contracted width | |
| 107. |
In an arch dam, the extrados curve refer to the arch rings corresponding to the ____________________ |
| A. | the upstream face of the dam |
| B. | downstream face of the dam |
| C. | side face of the dam |
| D. | either upstream or downstream face of the dam |
| Answer» B. downstream face of the dam | |
| 108. |
In foundation slide failure___________________________ |
| A. | top of embankment gets cracked and lower slope moves outward forming large mud waves near the heel |
| B. | top of embankment gets cracked and lower slope moves inward forming large mud waves near the heel |
| C. | bottom of embankment gets cracked and lower slope moves outward forming large mud waves near the heel |
| D. | bottom of embankment gets cracked and lower slope moves inward forming large mud waves near the heel |
| Answer» B. top of embankment gets cracked and lower slope moves inward forming large mud waves near the heel | |
| 109. |
A V-shaped valley with stronger foundations can suggest the choice of an arch dam is of the type ___________________________ |
| A. | constant radius arch dam |
| B. | variable radius arch dam |
| C. | constant angle arch dam |
| D. | variable angle arch dam |
| Answer» D. variable angle arch dam | |
| 110. |
The length of horizontal blanket should be equal to _________________ |
| A. | 3 times the height of the dam |
| B. | 4 times the height of the dam |
| C. | 5 times the height of the dam |
| D. | 6 times the height of the dam |
| Answer» B. 4 times the height of the dam | |
| 111. |
What is the most critical condition of slide of the U/s slope? |
| A. | The sudden drawdown of the reservoir |
| B. | Reservoir full condition |
| C. | Steady seepage condition |
| D. | Sudden drawdown and reservoir full condition |
| Answer» B. Reservoir full condition | |
| 112. |
When the reservoir is full, the slope which is most likely to slide is _____________________ |
| A. | the upstream slope |
| B. | the downstream slope |
| C. | both upstream and downstream slope |
| D. | no effect |
| Answer» C. both upstream and downstream slope | |
| 113. |
Calculate the longitudinal braking force (P) for four-lane bridges designed for class 70R loading. |
| A. | 14 tonnes |
| B. | 21 tonnes |
| C. | 17.5 tonnes |
| D. | 35 tonnes |
| Answer» C. 17.5 tonnes | |
| 114. |
When the reservoir is empty, the single force acting on it is the self-weight of the dam which acts at a distance of ____________ |
| A. | B/2 from the heel |
| B. | B/6 from the heel |
| C. | B/3 from the heel |
| D. | B/4 from the heel |
| Answer» D. B/4 from the heel | |
| 115. |
The factor of safety against overturning generally varies between ___________ |
| A. | 2 to 3 |
| B. | 1.5 to 2 |
| C. | 0.5 to 1.5 |
| D. | 1 to 2 |
| Answer» B. 1.5 to 2 | |
| 116. |
Which of the following formula is valid when the downstream depth is more than 80% of the upstream depth? |
| A. | Unwin’s formula |
| B. | Broad-crested weir formula |
| C. | Orifice formula |
| D. | Molesworth formula |
| Answer» D. Molesworth formula | |
| 117. |
While going to the Tirupati Tirumala Devasthanam from Madras, highway road is found to be lowered at several places over which natural drainage flow during the rainy season. Such dips in the roads are called ___________________ |
| A. | freeways |
| B. | road dips |
| C. | causeways |
| D. | broadways |
| Answer» D. broadways | |
| 118. |
What is the value of the coefficient of discharge for the wide bridge opening with floors? |
| A. | 0.90 |
| B. | 0.94 |
| C. | 0.96 |
| D. | 0.98 |
| Answer» D. 0.98 | |
| 119. |
During seepage through an earthen mass, the direction of seepage is ________________ to the equipotential lines. |
| A. | perpendicular |
| B. | parallel |
| C. | not defined |
| D. | diagonal |
| Answer» B. parallel | |
| 120. |
The vertical component of the earthquake wave which produces adverse effects on the stability of a dam when is acting in ____________________ |
| A. | upward direction |
| B. | downward direction |
| C. | both upward and downward direction |
| D. | any direction |
| Answer» C. both upward and downward direction | |
| 121. |
The effects of capillary fringe are on the slightly safer side and are neglected. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 122. |
Stone pitching or riprap is generally provided to avoid _______________ |
| A. | over-topping |
| B. | erosion of U/s and d/s face |
| C. | cracking due to frost action |
| D. | gully formation |
| Answer» C. cracking due to frost action | |
| 123. |
In a concrete gravity dam with a vertical upstream face the stabilising force is provided by the ___________________ |
| A. | weight of the dam |
| B. | the water supported against the upstream slope |
| C. | uplift pressure |
| D. | water pressure at the tail end |
| Answer» B. the water supported against the upstream slope | |
| 124. |
Provision of sufficient freeboard eliminates _______________i. Over-topping failureii. Erosion of U/s faceiii. Erosion of D/s faceiv. Cracking due to frost actionv. Gully formationWhich of the following is/are correct? |
| A. | i and v |
| B. | ii and iii |
| C. | iv and v |
| D. | i and iv |
| Answer» E. | |
| 125. |
For triangular dam section of height H for just no tension under the action of water pressure, self-weight and uplift pressure, the minimum base width required is _____________ |
| A. | H / (S-1) |
| B. | H / S^1/2 |
| C. | H / (S – 1)⁻¹ |
| D. | H / (S-1)^1/2 |
| Answer» E. | |
| 126. |
Which of the following zone in Zoned type embankment prevents piping through cracks? |
| A. | Central core |
| B. | Transition zone |
| C. | Outer zone |
| D. | Core wall |
| Answer» C. Outer zone | |
| 127. |
Which of the following criteria has to be satisfied for no tension at any point on a gravity dam? |
| A. | The resultant of all the forces must always pass through the mid-point of the base of the dam |
| B. | The resultant force for all conditions of loading must pass through the middle third of the base |
| C. | The resultant of all the forces must pass through the upstream extremity of the middle third of the base |
| D. | The resultant of all the forces must pass through the downstream extremity of the middle third of the base |
| Answer» C. The resultant of all the forces must pass through the upstream extremity of the middle third of the base | |
| 128. |
What is the value of horizontal destabilizing force caused by the formation of waves in a storage reservoir having a fetch of 52 km due to high wind of 172 km/h? |
| A. | 30 KN |
| B. | 60 KN |
| C. | 130 KN |
| D. | 180 KN |
| Answer» E. | |
| 129. |
The upward acceleration of dam due to seismic activity will ________________________ |
| A. | increase the base pressure |
| B. | decrease the base pressure |
| C. | not affect the effective weight of the dam |
| D. | increase the horizontal dynamic force |
| Answer» B. decrease the base pressure | |
| 130. |
Which among the following type of dam section is expected to be the thinnest and the most economical? |
| A. | Constant angle arch dam |
| B. | Shell-arch dam |
| C. | Constant radius arch dam |
| D. | Concrete gravity dam |
| Answer» C. Constant radius arch dam | |
| 131. |
____________________ is provided when large scale stratification occurs. |
| A. | Chimney drain |
| B. | Cut-off |
| C. | Relief wells |
| D. | Trenches |
| Answer» B. Cut-off | |
| 132. |
A bridge culvert is to be constructed across a proposed lined canal. The afflux at this site for a contracted canal width can be computed by __________ |
| A. | Unwin’s formula |
| B. | Broad-crested weir formula |
| C. | Orifice formula |
| D. | Molesworth formula |
| Answer» E. | |
| 133. |
Calculate the value of maximum scour depth for a single span structure having normal scour depth 5m. |
| A. | 5 m |
| B. | 7.5 m |
| C. | 2.5 m |
| D. | 10 m |
| Answer» C. 2.5 m | |
| 134. |
Which of the following failures generally occur due to the development of unaccounted pore pressures? |
| A. | Hydraulic failures |
| B. | Piping through the dam body |
| C. | Sliding in embankments |
| D. | Sloughing of the d/s toe |
| Answer» D. Sloughing of the d/s toe | |
| 135. |
Calculate the economic length of one span for RCC Slab Bridge if the total height of abutment or pier from the bottom of its foundation to its top is 6m. |
| A. | 6 m |
| B. | 4 m |
| C. | 9 m |
| D. | 3 m |
| Answer» D. 3 m | |
| 136. |
Calculate the top width (A) of the earth dam of height 50 m. |
| A. | 5.0 m |
| B. | 4.75 m |
| C. | 6.10 m |
| D. | 3 m |
| Answer» D. 3 m | |
| 137. |
The process of laying and compacting earth in layers by power rollers under OMC for construction of earthen dams is known as ______________________ |
| A. | Rolled fill method |
| B. | Hydraulic fill method |
| C. | OMC method |
| D. | Compaction |
| Answer» B. Hydraulic fill method | |
| 138. |
The upstream face of the earth dam is considered as _____________________ |
| A. | equipotential line |
| B. | streamline |
| C. | streak line |
| D. | path line |
| Answer» B. streamline | |
| 139. |
The small openings made in the huge body of a concrete gravity dam such as sluices and inspection galleries can be assumed to be causing only local effects without any appreciable effect on the distribution of stresses as per the principle of_____________________ |
| A. | Laplace |
| B. | St. Venant |
| C. | Reynold |
| D. | St. Francis |
| Answer» C. Reynold | |
| 140. |
A concrete gravity dam having a maximum reservoir level at 200 m and the RL of the bottom of the dam 100 m. The maximum allowable compressive stress in concrete is 3000 KN/m² and the specific gravity of concrete is 2.4. Calculate the height of the dam and check whether it is a high dam or low dam. |
| A. | H = 90 m High gravity dam |
| B. | H = 90 m Low gravity dam |
| C. | H = 214.2 m High gravity dam |
| D. | H = 214.2 m Low gravity dam |
| Answer» B. H = 90 m Low gravity dam | |
| 141. |
Greater is the wall curvature in an arch dam, greater will be the economy in the dam thickness. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 142. |
In Fellenius method for small values of angle of internal friction of soil, the critical arc passes ________________ |
| A. | through the toe of the slope |
| B. | above the toe of the slope |
| C. | below the toe of the slope |
| D. | anywhere near the toe of the slope |
| Answer» D. anywhere near the toe of the slope | |
| 143. |
If the eccentricity of the resultant falls outside the middle third, the ultimate failure of the dam occurs by ______________ |
| A. | tension |
| B. | crushing |
| C. | sliding |
| D. | overturning |
| Answer» B. crushing | |
| 144. |
What is the value of eccentricity for no tension condition in the dam? |
| A. | e < B/6 |
| B. | e > B/6 |
| C. | e > B/3 |
| D. | e < B/3 |
| Answer» B. e > B/6 | |
| 145. |
Which of the following type of dam requires very strong and stable foundations and is not in use as much as the other types? |
| A. | Multiple dome-type dams |
| B. | Massive head type dam |
| C. | Columnar buttress type dam |
| D. | Deck slab type dam |
| Answer» D. Deck slab type dam | |
| 146. |
The seepage forces within the filter are controlled up to permissible small magnitudes when the ratio of D₁₅ of filter to D₁₅ of base material is ___________________ |
| A. | between 5 to 40 |
| B. | less than 5 |
| C. | between 5 to 20 |
| D. | less than 4 |
| Answer» B. less than 5 | |
| 147. |
What is the average value of acceleration that is sufficient for high dams in seismic zones? |
| A. | 0.1g to 0.15g |
| B. | 0.05g to 0.1g |
| C. | 0.3gs |
| D. | 0.15g (where g is the acceleration due to gravity) |
| Answer» B. 0.05g to 0.1g | |
| 148. |
What is Von Karman’s formula for hydrodynamic force (Pₑ)? |
| A. | Pₑ = 0.726 pₑ H |
| B. | Pₑ = 0.424 pₑ H |
| C. | Pₑ = 0.555 pₑ H |
| D. | Pₑ = 0.555.Kₕ. Yw H² |
| Answer» E. | |
| 149. |
The proposed masonry arch bridge having the total height of its abutments or piers from top to bottom as H can be proposed to have economical spans each equal to ______ |
| A. | 2/3 H |
| B. | 2H |
| C. | 1.2 H |
| D. | 1.5 H |
| Answer» C. 1.2 H | |
| 150. |
What is the suggested economic buttress spacing for a mean dam height of greater than 45 m? |
| A. | 4.5 |
| B. | 4.5 to 7.5 |
| C. | 7.5 to 12 |
| D. | 12 to 15 |
| Answer» E. | |