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WorksheetsD38 MASTER THE DAY
Total questions: 113
Worksheet time: 2hrs 53mins
Name
Class
Date
1.
What is the theoretical profile shape of a rigid dam?
a)
Rectangular
b)
Right angle triangle
c)
Trapezoidal
d)
Curved shell
2.
Which type of dam primarily uses arch action to transfer load to abutments?
a)
Gravity dam
b)
Buttress dam
c)
Arch dam
d)
Earth dam
3.
Which type of dam is preferred in earthquake-prone areas due to its flexibility?
a)
Gravity dam
b)
Earth dam
c)
Rockfill dam
d)
Masonry dam
4.
Which dam type cannot be used as an overflow dam?
a)
Concrete dam
b)
Masonry dam
c)
Rockfill dam
d)
Buttress dam
5.
Which dam type is most suitable for narrow and deep gorges?
a)
Earth dam
b)
Arch dam
c)
Buttress dam
d)
Concrete dam
6.
Which is NOT a type of single curvature arch dam?
a)
Constant radius arch dam
b)
Varying radius arch dam
c)
Constant angle arch dam
d)
Cupola arch dam
7.
The shape of an elementary gravity dam is:
a)
Trapezoidal
b)
Polygon
c)
Right-angle triangle
d)
Parabola
8.
What dam structure is temporarily built to exclude water from a work site?
a)
Penstock
b)
Spillway
c)
Cofferdam
d)
Abutment
9.
Which component is the junction of the downstream face of a dam and natural ground?
a)
Heel
b)
Toe
c)
Abutment
d)
Spillway
10.
Which of the following is a function of spillway in a dam?
a)
Storing sediment
b)
Draining water into galleries
c)
Discharging excess flood water
d)
Providing foundation support
11.
Which force is considered the major external force acting on a dam?
a)
Wave pressure
b)
Water pressure
c)
Ice pressure
d)
Earthquake pressure
12.
In a gravity dam, what is the permissible maximum eccentricity for no tension?
a)
b/2
b)
b/3
c)
b/5
d)
b/6
13.
Which of the following is a disadvantage of earth dams?
a)
High initial cost
b)
Cannot be built in flat terrain
c)
Sudden failure without prior warning
d)
Not suitable for irrigation
14.
What is the function of a gallery in a dam?
a)
To store water
b)
To inspect and drain the dam
c)
To measure water level
d)
To collect debris
15.
Which dam uses inclined slabs supported by buttresses for support?
a)
Deck type buttress dam
b)
Massive head type buttress dam
c)
Multiple arch type dam
d)
Arch dam
16.
What is the economic height of a dam?
a)
Height at which dam is safest
b)
Height providing maximum water storage
c)
Height at which cost per unit storage is minimum
d)
Maximum height permitted by codes
17.
Which type of dam includes sills, struts, and laggings?
a)
Beaver type timber dam
b)
Rock-filled crib dam
c)
A-frame timber dam
d)
Steel dam
18.
Which of the following acts as a vertical opening connecting galleries?
a)
Outlet
b)
Shaft
c)
Intake
d)
Spillway
19.
Which dam type uses a sloping membrane supported by buttresses?
a)
Gravity dam
b)
Deck type buttress dam
c)
Arch dam
d)
Embankment dam
20.
Which dam is most suitable where locally available soil is used and no strong foundation is needed?
a)
Concrete dam
b)
Rockfill dam
c)
Earth dam
d)
Arch dam
21.
Which type of dam is also known as a conservation or impounding dam?
a)
Diversion dam
b)
Storage dam
c)
Detention dam
d)
Check dam
22.
Which dam type is most suitable for storing flood water and releasing it slowly?
a)
Diversion dam
b)
Storage dam
c)
Detention dam
d)
Rockfill dam
23.
What is the purpose of a debris dam or check dam?
a)
To divert water flow
b)
To trap sediments and prevent them from entering the main reservoir
c)
To store irrigation water
d)
To release excess floodwater
24.
Which of the following dams requires the strongest abutments but not necessarily a strong foundation?
a)
Gravity dam
b)
Arch dam
c)
Earth dam
d)
Buttress dam
25.
Which type of steel dam transmits water pressure through inclined struts directly to the foundation?
a)
Cantilever type
b)
Direct strutted type
c)
Multiple arch type
d)
Massive head type
26.
Which type of timber dam is best suited for regions with abundant timber and low height requirements?
a)
Rock filled crib type
b)
Beaver type
c)
A-frame type
d)
Deck type
27.
What does the term 'freeboard' in a dam refer to?
a)
Base width
b)
Top width
c)
Vertical distance between top of dam and water level
d)
Width of spillway
28.
Which is a disadvantage of gravity dams?
a)
Require least maintenance
b)
Sudden failure is likely
c)
Can be constructed to any height
d)
High initial cost and skilled labor required
29.
Which of the following terms refers to the part of the valley against which the dam is constructed?
a)
Toe
b)
Abutment
c)
Spillway
d)
Heel
30.
Which type of buttress dam is suitable for higher heights and uses arches to transmit loads?
a)
Deck type
b)
Massive head type
c)
Multiple arch type
d)
Arch dam
31.
Assertion: Rockfill dams are more flexible than gravity dams.
Reason: Rockfill dams are constructed using rock boulders with shock-absorbing capacity.
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
32.
Assertion: Arch dams are economical and use less material.
Reason: Arch dams are curved only in the vertical direction.
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
33.
Match the types of dams with their features:
A. Arch Dam B. Gravity Dam C. Earth Dam D. Buttress Dam
1.Heavy self weight 2.Use inclined slabs 3.Curved structure 4.locally available soil
a)
A-3, B-1, C-4, D-2
b)
A-2, B-1, C-3, D-4
c)
A-1, B-4, C-2, D-3
d)
A-3, B-4, C-1, D-2
34.
Which dam type is made of stone masonry in cement mortar and is usually a gravity dam?
a)
Concrete dam
b)
Earth dam
c)
Masonry dam
d)
Rockfill dam
35.
Which dam component is used to withdraw water for various purposes?
a)
Gallery
b)
Outlet or sluiceway
c)
Spillway
d)
Toe
36.
What is the primary function of an intake structure in a dam system?
a)
Storing floodwater
b)
Collecting water from the reservoir
c)
Releasing excess water
d)
Trapping sediments
37.
Which of the following is a minor force often neglected in dam design?
a)
Water pressure
b)
Wave pressure
c)
Ice pressure
d)
Wind pressure
38.
Which dam profile modification provides space for roadways and freeboard?
a)
Elementary profile
b)
Practical profile
c)
Trapezoidal profile
d)
U-shaped profile
39.
What ensures stability in a gravity dam by resisting external forces?
a)
Arch action
b)
Weight of the dam itself
c)
Flexible joints
d)
Steel reinforcements
40.
What is a major reason for failure in compression/crushing mode in dams?
a)
Water overtopping
b)
Excessive tensile forces
c)
Compressive stress exceeding allowable stress
d)
Slope instability
41.
Which type of arch dam is most economical among single curvature types?
a)
Constant radius arch dam
b)
Varying radius arch dam
c)
Constant angle arch dam
d)
Cupola arch dam
42.
Which type of arch dam is best suited for U-shaped valleys?
a)
Varying radius arch dam
b)
Cupola arch dam
c)
Constant radius arch dam
d)
Constant angle arch dam
43.
Which type of arch dam is used in V-shaped valleys?
a)
Constant angle arch dam
b)
Cupola arch dam
c)
Constant radius arch dam
d)
Varying radius arch dam
44.
Which dam type is more flexible and has lesser base width compared to earth dams?
a)
Concrete dam
b)
Rockfill dam
c)
Steel dam
d)
Gravity dam
45.
Which type of dam consists of sills fastened to rock by bolts and uses timber?
a)
Beaver type
b)
A-frame type
c)
Crib type
d)
Deck type
46.
Which is the simplest type of arch dam design?
a)
Varying radius arch dam
b)
Constant angle arch dam
c)
Cupola dam
d)
Constant radius arch dam
47.
Which steel dam type involves cantilever action from the top strut?
a)
Direct strutted type
b)
Arch type
c)
Cantilever type
d)
Deck type
48.
What is the base width of a gravity dam profile represented as?
a)
Parabolic
b)
Polygonal
c)
Triangular
d)
Rectangular
49.
Why is a shear key provided at the heel of a gravity dam?
a)
To improve aesthetics
b)
To provide overflow channel
c)
To prevent overturning
d)
To increase shear strength of base
50.
What is the best angle for constant angle arch dam design?
a)
133° 34′
b)
90°
c)
120°
d)
110° 45′
51.
What is the key feature of a multiple arch buttress dam?
a)
Flat slab panels
b)
U-shaped spillway
c)
Series of arches supported by buttresses
d)
Massive concrete section
52.
Which dam uses horizontal and vertical curvature for load transfer?
a)
Constant angle arch dam
b)
Cupola or double curvature arch dam
c)
Varying radius arch dam
d)
Earth dam
53.
What is the usual material used in a rock-filled crib timber dam?
a)
Concrete
b)
Steel
c)
Rock boulders
d)
Plastic
54.
Which part of the dam structure is used to measure its deflection?
a)
Toe
b)
Gallery
c)
Plumber shaft
d)
Spillway
55.
Which force is resisted by shear strength of the soil in an earth dam?
a)
Wind pressure
b)
Wave pressure
c)
Water pressure
d)
Seismic pressure
56.
Which condition applies when reservoir is full and earthquake occurs?
a)
Extreme load condition
b)
Normal condition
c)
Uplift-free condition
d)
Dry load condition
57.
Which failure mode occurs when resultant of forces lies outside the base width?
a)
Sliding
b)
Overturning
c)
Crushing
d)
Tension
58.
Which dam type is constructed temporarily to divert flow during construction?
a)
Spillway dam
b)
Diversion dam
c)
Cofferdam
d)
Outlet dam
59.
What is the life span of typical timber dams?
a)
10–20 years
b)
30–40 years
c)
50–60 years
d)
70–80 years
60.
Which is an advantage of using rockfill dam over gravity dam?
a)
Can be constructed to any height
b)
Requires very strong foundation
c)
Better suited for seismic regions
d)
Requires least maintenance
61.
Which material is generally used in a massive head type buttress dam?
a)
Plain concrete
b)
Steel
c)
Masonry
d)
Reinforced concrete
62.
Which type of dam uses panels made of flat reinforced concrete slabs?
a)
Deck type buttress dam
b)
Massive head type dam
c)
Multiple arch dam
d)
Cupola dam
63.
The base width of a gravity dam depends on which factor?
a)
Length of dam
b)
Specific gravity of concrete
c)
Height of reservoir
d)
Type of riverbed
64.
In which type of dam does the uplift pressure play a significant design role?
a)
Earth dam
b)
Gravity dam
c)
Rockfill dam
d)
Steel dam
65.
What is the major design concern in a dam when reservoir is empty?
a)
Wave pressure
b)
Sliding
c)
Earthquake loading
d)
Silt pressure
66.
Which dam component refers to the contact between upstream face and foundation?
a)
Toe
b)
Heel
c)
Abutment
d)
Spillway
67.
Which dam is preferred when soil is weak but plenty of rock boulders are available?
a)
Gravity dam
b)
Rockfill dam
c)
Steel dam
d)
Arch dam
68.
What shape does the hydrostatic pressure distribution in a dam resemble?
a)
Rectangle
b)
Square
c)
Right angle triangle
d)
Parabola
69.
What is the function of a shaft in dam structure?
a)
Prevent seepage
b)
Transfer load
c)
Connect galleries vertically
d)
Discharge water
70.
Which type of dam includes flood control as its primary purpose?
a)
Diversion dam
b)
Detention dam
c)
Storage dam
d)
Cofferdam
71.
Which shape profile is adopted in practical gravity dams to accommodate roadways and freeboard?
a)
Circular
b)
Trapezoidal
c)
Practical profile
d)
Parabolic
72.
In which type of dam is failure most likely without prior warning?
a)
Rockfill dam
b)
Earth dam
c)
Concrete dam
d)
Arch dam
73.
Which dam transfers water thrust using cantilever action to the foundation?
a)
Arch dam
b)
Earth dam
c)
Steel dam
d)
Deck dam
74.
What is a key benefit of using double curvature arch dams?
a)
Thicker section
b)
Ease of design
c)
Economical and efficient stress distribution
d)
Higher material consumption
75.
Assertion: Gravity dams can be constructed to any height.
Reason: Gravity dams are highly flexible and deformable.
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
76.
Assertion: Cofferdams are used during construction.
Reason: Cofferdams store water for irrigation.
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
77.
Match the dam type with characteristic profile: A. Gravity Dam B. Rockfill Dam C. Arch Dam D. Earth Dam
1.trapezoidal profile
2.curved
3.right angle triangle
4.less base width
a)
A-3, B-4, C-2, D-1
b)
A-1, B-2, C-4, D-3
c)
A-4, B-2, C-3, D-1
d)
A-1, B-3, C-2, D-4
78.
Which dam type is composed entirely of a single kind of material?
a)
Zoned earth dam
b)
Homogeneous earth dam
c)
Rockfill dam
d)
Hydraulic fill dam
79.
Which structural component of a dam is used to measure vertical deflections?
a)
Gallery
b)
Outlet
c)
Plumber shaft
d)
Core wall
80.
What is the unit pressure of ice considered in dam design for cold regions?
a)
150 kN/m²
b)
200 kN/m²
c)
250 kN/m²
d)
300 kN/m²
81.
Which dam type is also known as a shell arch dam?
a)
Constant radius arch dam
b)
Varying radius arch dam
c)
Constant angle arch dam
d)
Double curvature arch dam
82.
Which dam is cited as an example of a deck type buttress dam?
a)
Hoover dam
b)
Stony George dam
c)
Idukki dam
d)
Pueblo dam
83.
Which component of an earth dam is used as a barrier to uplift pressure?
a)
Gallery
b)
Blanket
c)
Core wall
d)
Abutment
84.
What is the major resisting force that counteracts water and uplift pressure in dams?
a)
Wind pressure
b)
Silt pressure
c)
Weight of dam
d)
Ice pressure
85.
Which structure is provided at the base to withdraw water from a reservoir?
a)
Gallery
b)
Spillway
c)
Cutoff wall
d)
Sluice way
86.
Which profile represents the ideal shape of a gravity dam to resist water pressure?
a)
Parabolic
b)
Trapezoidal
c)
Rectangular
d)
Triangular
87.
Which term refers to a layer of coarser material placed at the downstream face of an earthen dam?
a)
Blanket
b)
Turfing
c)
Filter
d)
Core wall
88.
Which failure in earthen dams occurs due to erosion from heavy rain on slopes?
a)
Piping
b)
Gullying
c)
Toe erosion
d)
Structural failure
89.
What is the shape of the phreatic line in an earthen dam?
a)
Straight line
b)
Hyperbola
c)
Parabola
d)
Circle
90.
Which dam has both horizontal and vertical curvatures?
a)
Constant radius dam
b)
Constant angle dam
c)
Double curvature dam
d)
Deck type dam
91.
Which force is calculated using γw(H²)/2 and acts at H/3 from the base?
a)
Wave pressure
b)
Water pressure
c)
Silt pressure
d)
Wind pressure
92.
What percentage of dam failures is attributed to structural failure?
a)
20%
b)
30%
c)
40%
d)
10%
93.
Which type of dam uses sills, struts, and laggings in its structure?
a)
Beaver type dam
b)
Rock filled crib dam
c)
A-frame timber dam
d)
Steel dam
94.
Which timber dam type is suitable for small heights and abundant timber areas?
a)
A-frame type
b)
Beaver type
c)
Rock filled crib type
d)
Deck type
95.
What is the formula used to estimate uplift pressure at the dam gallery?
a)
γwH
b)
γw(H' + 1/3(H – H'))
c)
γwH²/2
d)
γwH'/2
96.
Which dam is an example of a double curvature arch dam in India?
a)
Hirakud Dam
b)
Idukki Dam
c)
Bhakra Nangal Dam
d)
Pandoh Dam
97.
Which pressure acts due to sediments accumulating at the upstream face of a dam?
a)
Uplift pressure
b)
Water pressure
c)
Silt pressure
d)
Wave pressure
98.
What kind of failure is caused when internal erosion creates tunnels within the dam?
a)
Sliding
b)
Piping
c)
Gullying
d)
Structural collapse
99.
In dam design, what is the minimum factor of safety against overturning?
a)
1.25
b)
1.0
c)
1.5
d)
2.0
100.
Which pressure acts horizontally due to wind on the dam surface?
a)
Uplift pressure
b)
Water pressure
c)
Wind pressure
d)
Silt pressure
101.
Which failure is likely due to an under-designed spillway?
a)
Structural failure
b)
Overtopping
c)
Seepage
d)
Piping
102.
Which layer is provided to counter saturation gradient in earth dams?
a)
Filter
b)
Blanket
c)
Pustha
d)
Sluice
103.
What type of earth dam uses different materials for core and shells?
a)
Homogeneous earth dam
b)
Zoned earth dam
c)
Rolled fill dam
d)
Hydraulic fill dam
104.
Which type of steel dam transmits pressure directly through inclined struts?
a)
Cantilever type
b)
Direct strutted type
c)
Massive head type
d)
Deck type
105.
Which dam type allows for automatic gradation of materials during construction?
a)
Zoned dam
b)
Homogeneous dam
c)
Hydraulic fill dam
d)
Rolled fill dam
106.
Which dam structure consists of number of spans with water load transferred to buttresses?
a)
Arch dam
b)
Buttress dam
c)
Gravity dam
d)
Earth dam
107.
Which dam component is constructed vertically to intercept water seepage at base?
a)
Blanket
b)
Core wall
c)
Cutoff wall
d)
Gallery
108.
Which method is currently adopted for earth dam construction?
a)
Hydraulic fill method
b)
Rolled fill method
c)
Sluice fill method
d)
Mixed fill method
109.
Which dam type may fail suddenly without warning due to structural weakness?
a)
Rockfill dam
b)
Zoned dam
c)
Concrete dam
d)
Deck type dam
110.
Which component is provided to distribute load over a large area in zoned earth dams?
a)
Core
b)
Blanket
c)
Outer shell
d)
Pustha
111.
What does the term 'heel' refer to in gravity dams?
a)
Base width
b)
Junction of upstream face and foundation
c)
Downstream edge of dam
d)
Water outlet
112.
What is the function of a gallery inside a gravity dam?
a)
Prevent overtopping
b)
Drain seepage and provide inspection access
c)
Control uplift
d)
Store floodwater
113.
Which dam type uses concrete with reinforcement to handle loads?
a)
Masonry dam
b)
Timber dam
c)
Concrete dam
d)
Steel dam
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