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WorksheetsD37 MASTER THE DAY
Total questions: 117
Worksheet time: 2hrs 56mins
Name
Class
Date
1.
Which of the following is NOT a purpose of diversion headwork?
a)
To raise the water level in the river
b)
To generate electricity
c)
To regulate water into the canal
d)
To control silt entry into canal
2.
A solid obstruction put across a river with major ponding by crest is called:
a)
Dam
b)
Barrage
c)
Weir
d)
Spur
3.
In a barrage, most of the ponding is done by:
a)
Crest
b)
Gates
c)
Guide banks
d)
Fish ladder
4.
Afflux refers to:
a)
Water level drop downstream of the weir
b)
Flow velocity increase after sluice
c)
Rise in upstream flood level due to weir construction
d)
None of the above
5.
Weirs aligned at right angles to river flow are used when:
a)
River bed is gravel
b)
River bed is silty or sandy
c)
River is perennial
d)
Trough stage is not suitable
6.
Gravity weirs balance uplift pressure using:
a)
Weight of floor only
b)
Weight of pier only
c)
Weight of body and floor
d)
Frictional resistance of floor
7.
Which of the following weir types is obsolete?
a)
Concrete weir with sloping glacis
b)
Masonry weir with vertical drop
c)
Barrage type
d)
Hydraulic jump-based weir
8.
Silt excluders are constructed at:
a)
Downstream of head regulator
b)
Bed of canal upstream
c)
Bed of river upstream
d)
On crest of weir
9.
Failure by piping occurs due to:
a)
Direct uplift pressure
b)
Hydraulic jump rupture
c)
Seepage removing foundation soil
d)
Insufficient afflux
10.
Bligh's creep theory does NOT consider:
a)
Vertical creep
b)
Horizontal creep
c)
Exit gradient
d)
Uplift pressure
11.
Component of diversion headwork that separates undersluices from the weir:
a)
Canal head regulator
b)
Fish ladder
c)
Divide wall
d)
Scouring sluice
12.
Fish ladder is provided to:
a)
Divert water to canal
b)
Control silt entry
c)
Allow fish to pass upstream
d)
Form hydraulic jump
13.
Which device removes silt from canal water downstream of the head regulator?
a)
Silt excluder
b)
Silt ejector
c)
Scouring sluice
d)
Fish ladder
14.
Uplift failure is countered by:
a)
Providing weep holes
b)
Using lighter concrete
c)
Providing sufficient floor thickness
d)
None of the above
15.
Scouring sluices are used to:
a)
Release flood water
b)
Control fish movement
c)
Remove silt from pocket near head regulator
d)
Measure flow
16.
Relative density of concrete is 2.5, uplift pressure head is 4.5 m. Min thickness of floor?
a)
1m
b)
2m
c)
1.8m
d)
4m
17.
Best location for diversion headwork is:
a)
Upper catchment
b)
Alluvial trough stage
c)
Mountainous region
d)
Delta
18.
Main reason for choosing concrete weir with sloping glacis:
a)
Aesthetics
b)
Obsolete technology
c)
Suitable for permeable foundations
d)
Suitable for rocky foundations only
19.
Crest of canal head regulator is kept:
a)
Below crest of undersluice
b)
Same as weir crest
c)
Above crest of undersluice
d)
Below pond level
20.
Bligh’s theory assumes uplift pressure distribution as:
a)
Linear
b)
Parabolic
c)
Non-linear
d)
Stepwise
21.
Which of the following is a permanent type of diversion headwork?
a)
Bund
b)
Spur
c)
Weir
d)
Sandbag
22.
Crest level in a diversion headwork refers to:
a)
Maximum flood level
b)
Top of the weir
c)
Bottom of canal bed
d)
Level of silt ejector
23.
Hydraulic jump in a modern concrete weir is formed on the:
a)
Upstream glacis
b)
Downstream glacis
c)
Crest
d)
Floor
24.
Barrage is considered more efficient than weir because:
a)
It is cheaper
b)
It uses crest height only
c)
It uses gates for ponding
d)
It doesn't require training works
25.
Failure of weir due to seepage is called:
a)
Sliding
b)
Cracking
c)
Piping
d)
Washing
26.
Which method is used to counter piping failure in weirs?
a)
Reduce crest level
b)
Provide downstream cutoff pile
c)
Raise canal bed level
d)
Increase pond level
27.
In Khosla’s theory, which foundation condition is considered?
a)
Impervious and rigid
b)
Permeable and compressible
c)
Impervious and elastic
d)
Permeable and rigid
28.
What is the typical value of afflux?
a)
0.25 m
b)
1 m
c)
2.5 m
d)
3 m
29.
Which structure helps in repelling river currents away from the weir?
a)
Divide wall
b)
Fish ladder
c)
Silt ejector
d)
Scour sluice
30.
Undersluices are provided to:
a)
Supply water to canal
b)
Create turbulence upstream
c)
Remove silt from riverbed
d)
Stop fish migration
31.
In a non-gravity weir, uplift pressure is resisted by:
a)
Friction of base
b)
Weight of floor and pier
c)
Tension rods
d)
Wings walls
32.
Silt excluders are installed at:
a)
Downstream of canal head
b)
Upstream in riverbed
c)
On weir crest
d)
Side channel
33.
Which weir type is based on Khosla’s theory?
a)
Rockfill weir
b)
Vertical drop weir
c)
Concrete sloping glacis weir
d)
Spur weir
34.
What determines the top level of guide banks?
a)
Afflux
b)
Pond level
c)
FSL
d)
Crest height
35.
Which structure in a weir diverts fish upstream?
a)
Fish ladder
b)
Silt excluder
c)
Divide wall
d)
Undersluice
36.
The weight of the structure in a gravity weir resists:
a)
Wave pressure
b)
Uplift due to seepage
c)
Water temperature
d)
Earthquake forces
37.
Which type of dam is most suitable in an earthquake-prone area due to its flexibility?
a)
Gravity dam
b)
Arch dam
c)
Rockfill dam
d)
Masonry dam
38.
The theoretical profile of a rigid dam is generally:
a)
Trapezoidal
b)
Circular
c)
Parabolic
d)
Right-angled triangle
39.
Which dam primarily transfers water pressure to the abutments?
a)
Arch dam
b)
Earth dam
c)
Gravity dam
d)
Buttress dam
40.
Which of the following is NOT an advantage of gravity dams?
a)
Can be used as overflow sections
b)
Require skilled labour
c)
Least maintenance
d)
Can be built to any height
41.
What is the typical shape of the theoretical profile of an earth dam?
a)
Trapezoidal
b)
Rectangular
c)
Circular
d)
Parabolic
42.
Which dam type requires very strong abutments but not necessarily a strong foundation?
a)
Earth dam
b)
Arch dam
c)
Gravity dam
d)
Buttress dam
43.
What is the name of a temporary dam built to exclude water during construction?
a)
Spillway
b)
Cofferdam
c)
Check dam
d)
Diversion dam
44.
In a gravity dam, where should the resultant of all forces lie to avoid tension?
a)
At the toe
b)
At the heel
c)
In the middle third
d)
Outside the dam section
45.
Which type of dam is suitable for narrow V-shaped valleys?
a)
Constant radius arch dam
b)
Varying radius arch dam
c)
Gravity dam
d)
Rockfill dam
46.
Which force is typically not considered significant in dam design?
a)
Ice pressure
b)
Silt pressure
c)
Wind pressure
d)
Weight of dam
47.
Which dam type uses inclined struts to transfer water pressure to foundation?
a)
Deck type buttress dam
b)
Massive head dam
c)
Rockfill dam
d)
Arch dam
48.
Which of the following is a temporary type of timber dam?
a)
Multiple arch type
b)
Beaver type
c)
Gravity dam
d)
Cantilever type
49.
Which dam uses both arch and cantilever actions to transfer loads?
a)
Gravity dam
b)
Earth dam
c)
Arch dam
d)
Buttress dam
50.
The basic profile of a gravity dam is:
a)
Trapezoidal
b)
Triangular
c)
Circular
d)
Hexagonal
51.
The main purpose of a detention dam is:
a)
Power generation
b)
Drinking water
c)
Flood control
d)
Irrigation
52.
Which component is used to measure deflection in a dam?
a)
Gallery
b)
Toe
c)
Plumber shaft
d)
Abutment
53.
In which dam type is the base width significantly less than that of an earth dam?
a)
Gravity dam
b)
Rockfill dam
c)
Arch dam
d)
Buttress dam
54.
Assertion (A): Gravity dams require strong foundations. Reason (R): Their stability depends primarily on their weight.
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
55.
Assertion (A): Arch dams require strong foundations. Reason (R): They transfer load vertically to the base.
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
56.
Match the following: A) Arch dam B) Earth dam C) Gravity dam D) Buttress dam
a)
A-Load to abutments, B-Trapezoidal, C-Weight-based, D-Uses piers
b)
A-Weight-based, B-Uses piers, C-Trapezoidal, D-Load to abutments
c)
A-Trapezoidal, B-Weight-based, C-Uses piers, D-Load to abutments
d)
A-Uses piers, B-Load to abutments, C-Trapezoidal, D-Weight-based
57.
Which type of dam combines overflow and non-overflow sections in a river valley project?
a)
Arch dam
b)
Storage dam
c)
Combined dam
d)
Concrete dam
58.
Which type of dam is most economical and practical in remote locations?
a)
Gravity dam
b)
Arch dam
c)
Masonry dam
d)
Timber dam
59.
Which type of buttress dam is suitable for heights over 50 meters?
a)
Deck type
b)
Multiple arch type
c)
Massive head type
d)
Shell arch type
60.
What is the function of a spillway in a dam?
a)
Store sediment
b)
Support dam walls
c)
Discharge flood water
d)
Measure uplift pressure
61.
Which of the following is not a force acting on a dam?
a)
Wave pressure
b)
Weight of dam
c)
Wind pressure
d)
Friction pressure
62.
Which part of a dam connects the galleries at various levels?
a)
Abutment
b)
Heel
c)
Shaft
d)
Spillway
63.
Which condition represents the most extreme design scenario for dams?
a)
Reservoir empty
b)
Reservoir full with normal uplift
c)
MWL with maximum uplift
d)
Only dead load acting
64.
Which is an example of a single curvature arch dam?
a)
Idukki dam
b)
Hoover dam
c)
Wildhorse dam
d)
Pueblo dam
65.
Which dam is made from stone masonry in cement mortar?
a)
Steel dam
b)
Masonry dam
c)
Earth dam
d)
Arch dam
66.
Which is a disadvantage of steel dams?
a)
High flexibility
b)
High strength
c)
Corrosion maintenance cost
d)
Long lifespan
67.
Which type of timber dam consists of sills, struts, and laggings?
a)
Rock filled crib
b)
A-frame type
c)
Beaver type
d)
Shell arch type
68.
What shape does the profile of a non-rigid dam typically take?
a)
Rectangular
b)
Circular
c)
Trapezoidal
d)
Triangular
69.
Which type of dam cannot be used as an overflow dam?
a)
Gravity dam
b)
Masonry dam
c)
Concrete dam
d)
Earth dam
70.
Which component in a dam helps collect water from rivers or lakes?
a)
Spillway
b)
Gallery
c)
Intake structure
d)
Sluiceway
71.
Which element of a dam is located at the downstream face meeting the ground?
a)
Toe
b)
Heel
c)
Spillway
d)
Abutment
72.
Which type of steel dam transmits water pressure through inclined struts?
a)
Cantilever type
b)
Direct strutted type
c)
Arch type
d)
Frame type
73.
What is the best angle for constant angle arch dams?
a)
90°
b)
120°
c)
133° 34′
d)
145°
74.
Which curve is used to identify the economic height of a dam?
a)
Cost vs material
b)
Height vs cost per unit storage
c)
Volume vs storage
d)
Stress vs pressure
75.
Which force is the major cause of overturning in gravity dams?
a)
Weight of dam
b)
Wave pressure
c)
Water pressure
d)
Uplift pressure
76.
Which type of reservoir is used to store water during excess flow and release it during demand?
a)
Flood control reservoir
b)
Multipurpose reservoir
c)
Storage reservoir
d)
Distribution reservoir
77.
What is the function of a distribution reservoir?
a)
Store flood water
b)
Used in power generation
c)
Serve cities during peak demands
d)
Prevent overtopping of dams
78.
Which of the following is known as Full Reservoir Level (FRL)?
a)
Minimum draw down level
b)
Crest level of spillway
c)
Bed level
d)
Dead storage level
79.
The water between Normal Pool Level and Maximum Pool Level is called:
a)
Dead storage
b)
Surcharge storage
c)
Live storage
d)
Bank storage
80.
The difference between top of dam and Maximum Water Level is:
a)
Freeboard
b)
Gross freeboard
c)
Net freeboard
d)
FRL
81.
What does a 'Retarding reservoir' primarily do?
a)
Supply irrigation water
b)
Retain flood water and control outflow
c)
Distribute municipal water
d)
Recharge groundwater
82.
Valley storage in a reservoir refers to:
a)
Dead storage between bed and DSL
b)
Minimum volume before dam construction
c)
Volume behind the gates
d)
Storage during rainy season
83.
Bank storage helps in:
a)
Reducing storage
b)
Preventing seepage
c)
Increasing storage capacity
d)
Controlling evaporation
84.
Dead storage in a reservoir is the volume of water:
a)
Above NPL
b)
Between MWL and top of dam
c)
Below minimum pool level
d)
Between MDDL and FRL
85.
Which of the following reservoirs do not have controlling gates or valves?
a)
Detention reservoir
b)
Storage reservoir
c)
Distribution reservoir
d)
Flood control reservoir
86.
Statement 1: Detention reservoirs are used to reduce peak floods.
Statement 2: They are not equipped with gates or valves.
a)
Both statements are true
b)
Only Statement 1 is true
c)
Only Statement 2 is true
d)
Both statements are false
87.
Statement 1: Live storage is the water between NPL and minimum pool level.
Statement 2: This water is usually not used for power generation.
a)
Both statements are true
b)
Only Statement 1 is true
c)
Only Statement 2 is true
d)
Both statements are false
88.
Gross storage capacity is defined as:
a)
Storage between FRL and bed level
b)
Storage between FRL and MWL
c)
Storage between NPL and MDDL
d)
Storage below DSL
89.
The area submerged at FRL is called:
a)
Surcharge zone
b)
Water spread area
c)
Dead storage zone
d)
Freeboard
90.
Minimum Draw Down Level (MDDL) refers to:
a)
Top of the dam
b)
Level to which reservoir is used for power
c)
Valley floor
d)
Crest of spillway
91.
Effective storage is equal to:
a)
Live + Dead
b)
Gross – Surcharge
c)
Useful + Surcharge – Valley
d)
Gross + Valley
92.
Which zone stores water below Minimum Pool Level?
a)
Surcharge storage
b)
Bank storage
c)
Dead storage
d)
Live storage
93.
What is the purpose of providing freeboard in dams?
a)
Increase gross storage
b)
Control sedimentation
c)
Prevent overtopping
d)
Enhance evaporation
94.
Which type of reservoir is used in hydroelectric power plants?
a)
Distribution reservoir
b)
Detention reservoir
c)
Storage reservoir
d)
Flood control reservoir
95.
Which level marks the invert of supply sluice?
a)
DSL (Dead Storage Level)
b)
Bed level
c)
MWL (Max Water Level)
d)
FRL (Full Reservoir Level)
96.
Sluices in a dam extend from:
a)
Top to base
b)
Upstream to downstream face
c)
Left to right abutment
d)
Top of dam to crest
97.
Which of the following is the correct sequence of levels from bottom to top?
a)
Bed level, DSL, MDDL, FRL, MWL
b)
DSL, Bed level, MDDL, FRL, MWL
c)
FRL, DSL, MDDL, Bed level, MWL
d)
MDDL, DSL, FRL, Bed level, MWL
98.
What does MWL stand for in reservoir terminology?
a)
Minimum Water Level
b)
Maximum Water Level
c)
Median Water Level
d)
Measured Water Limit
99.
Which storage is located above the Full Reservoir Level?
a)
Dead storage
b)
Live storage
c)
Surcharge storage
d)
Bank storage
100.
What is the significance of Net Free-board in dams?
a)
It allows sediment deposition
b)
It adds to dead storage
c)
It prevents overtopping above MWL
d)
It increases live storage
101.
Which of the following decreases the effective capacity of a reservoir?
a)
Bank storage
b)
Dead storage
c)
Valley storage
d)
Gross free-board
102.
Reservoirs that serve irrigation and domestic water needs simultaneously are called:
a)
Single-purpose reservoir
b)
Retarding reservoir
c)
Multipurpose reservoir
d)
Flood control reservoir
103.
Which reservoir is best suited for small rivers and has no gates or valves?
a)
Retarding reservoir
b)
Distribution reservoir
c)
Flood control reservoir
d)
Multipurpose reservoir
104.
Live storage is defined as:
a)
Below dead storage
b)
Above dead storage and below FRL
c)
Above MWL
d)
Storage in valley area
105.
Why is minimum draw down level important for hydropower projects?
a)
It defines max reservoir height
b)
Below it, power cannot be generated
c)
It is FRL
d)
Used for navigation
106.
Which storage zone is normally unused under ordinary conditions?
a)
Surcharge storage
b)
Live storage
c)
Dead storage
d)
Gross storage
107.
Which component marks the highest level attained by water during design flood?
a)
MDDL
b)
FRL
c)
MWL
d)
DSL
108.
Water stored below Minimum Pool Level is termed as:
a)
Live storage
b)
Dead storage
c)
Bank storage
d)
Surcharge storage
109.
The contour areas at 2 m intervals are 1550 m², 2100 m², 2500 m², and 2900 m². Calculate the volume using the trapezoidal formula.
a)
16000 m³
b)
14500 m³
c)
17400 m³
d)
13650 m³
110.
Areas enclosed by contours are A1=3000 m², A2=4000 m², A3=4500 m², A4=5000 m². Contour interval is 3 m. Calculate volume using prismoidal formula.
a)
42000 m³
b)
39600 m³
c)
38400 m³
d)
40200 m³
111.
If gross storage = 300 million m³, useful storage = 200 million m³, what is dead storage?
a)
100 million m³
b)
50 million m³
c)
80 million m³
d)
120 million m³
112.
Gross storage = 800 Mm³, Valley storage = 120 Mm³, find Effective storage.
a)
700 Mm³
b)
680 Mm³
c)
720 Mm³
d)
650 Mm³
113.
If FRL = 120 m, MWL = 124 m, find Net Freeboard if Top of dam is at 126 m.
a)
2 m
b)
4 m
c)
6 m
d)
3 m
114.
If FRL = 110 m, Top of dam = 117 m, what is Gross Freeboard?
a)
5 m
b)
6 m
c)
7 m
d)
8 m
115.
Live storage = 250 Mm³, Surcharge = 40 Mm³, Valley storage = 20 Mm³. Find Effective storage.
a)
290 Mm³
b)
270 Mm³
c)
310 Mm³
d)
230 Mm³
116.
Trap efficiency = 60%, total sediment inflow = 50000 tonnes. Find retained sediments.
a)
30000 tonnes
b)
25000 tonnes
c)
35000 tonnes
d)
28000 tonnes
117.
Volume using trapezoidal method: A1 = 1000, A2 = 1200, A3 = 1300, A4 = 1250. Interval = 3 m.
a)
10875 m³
b)
11475 m³
c)
12250 m³
d)
12500 m³
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