Which of the following is a rigid dam?
Analysis & Theory
Gravity dams are rigid structures made of concrete or masonry that resist loads by weight.
Which of the following is a characteristic of non-rigid dams?
B
Can deform slightly under pressure
C
Cannot be used in seismic zones
D
Always constructed in narrow gorges
Analysis & Theory
Non-rigid dams like earthen and rock-fill types can deform slightly without failure.
An arch dam is classified as:
Analysis & Theory
Arch dams are rigid because they are built of concrete and do not deform appreciably under load.
Which dam type is most suitable for wide valleys with soft foundations?
Analysis & Theory
Earthen dams (non-rigid) are suitable for wide valleys with weaker soil foundations.
Which of the following is NOT a rigid dam?
Analysis & Theory
Rock-fill dams are non-rigid structures built using rocks and earth materials.
Which of the following statements is true for rigid dams?
A
They are made of soil and rock
B
They cannot withstand high pressure
C
They maintain their shape under pressure
D
They deform under water load
Analysis & Theory
Rigid dams maintain their geometry under pressure due to their stiff construction materials.
Which type of dam is more economical for low-height constructions on soft foundations?
Analysis & Theory
Earthen dams are more economical and suitable for low to medium height on soft ground.
Which of the following is a major disadvantage of non-rigid dams?
C
Susceptibility to seepage and erosion
D
Not suitable for wide valleys
Analysis & Theory
Non-rigid dams like earth dams are prone to seepage and require proper drainage design.
Rigid dams are usually preferred when:
B
Material availability is limited
C
The site is a narrow gorge with strong abutments
D
Construction speed is the priority
Analysis & Theory
Rigid dams like arch dams are preferred in narrow gorges with strong side supports.
Which of the following materials is commonly used in non-rigid dams?
Analysis & Theory
Non-rigid dams use compacted earth or rocks for construction.