Types of Dams: Buttress and Earthfill
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Questions and Answers

What type of dams are constructed using natural materials such as soil, clay, and rock?

  • Buttress Dams
  • Massive Head Type Dams
  • Rigid Dams
  • Rock Fill Dams (correct)

Which type of dam is mainly made from dumped and compacted rock fill?

  • Rock Fill Dams (correct)
  • Earthen Dams
  • Deck Type Dams
  • Multiple Arch Type Dams

What is the characteristic of non-rigid dams in terms of materials used for construction?

  • They are built with materials like earth, rock, or timber (correct)
  • They are made of concrete or masonry
  • They rely on their own weight and strength
  • They have an impermeable core

Which type of dam is designed to resist water pressure through its own weight and strength?

<p>Rigid Dams (A)</p> Signup and view all the answers

What is the purpose of buttresses in Buttress Dams?

<p>To support the sloping deck (C)</p> Signup and view all the answers

What distinguishes rock fill dams from earthen dams?

<p>The materials used (B)</p> Signup and view all the answers

What is the purpose of overflow dams?

<p>To allow excess water to flow over the top of the dam structure (A)</p> Signup and view all the answers

Which of the following is true about nonoverflow dams?

<p>They have spillways or outlets at lower levels (A)</p> Signup and view all the answers

What is the primary function of a reservoir?

<p>Storing water for drinking water supply (D)</p> Signup and view all the answers

How is a reservoir typically formed?

<p>By damming the outlet of a natural lake (B)</p> Signup and view all the answers

What is the difference between a storage reservoir and a direct supply reservoir?

<p>Direct supply reservoirs have uncontrolled outflow (A)</p> Signup and view all the answers

Which of the following is an advantage of overflow dams?

<p>Preventing flooding downstream (C)</p> Signup and view all the answers

What is the primary function of a dam gate known as a spillway gate?

<p>Releasing water during high flow events (A)</p> Signup and view all the answers

Which component of a dam gate physically controls the flow of water?

<p>Chute Spillway (A)</p> Signup and view all the answers

What is the purpose of a dam gate's operating mechanism?

<p>Control the flow rate of water (D)</p> Signup and view all the answers

Which type of spillway does not have a gate to control flow?

<p>Uncontrolled Spillway (D)</p> Signup and view all the answers

What type of mechanisms allow manual opening and closing of dam gates?

<p>Manual Mechanisms (D)</p> Signup and view all the answers

In which type of spillway are mechanical structures or gates provided to regulate the flow rate of water?

<p>Controlled Spillway (A)</p> Signup and view all the answers

What is the main purpose of spillways in a reservoir or dam?

<p>Prevent reservoir overflow and downstream floods (B)</p> Signup and view all the answers

How do spillways contribute to maintaining reservoir management?

<p>Releasing surplus water to maintain desired water levels (B)</p> Signup and view all the answers

What role do spillways play in preventing dam failure?

<p>Provide a controlled outlet for water to reduce pressure (B)</p> Signup and view all the answers

How do spillways assist in sediment management in rivers and reservoirs?

<p>Regulate flow to control sediment transport (D)</p> Signup and view all the answers

In what way can spillways be integrated into hydropower systems?

<p>Releasing water when not needed for power generation (A)</p> Signup and view all the answers

What is the critical impact of spillways during periods of high inflow?

<p>Can reduce the risk of dam failure by keeping water levels safe (D)</p> Signup and view all the answers

What type of mechanisms use hydraulic cylinders, pistons, or actuators to move the gate?

<p>Hydraulic mechanisms (B)</p> Signup and view all the answers

What component is responsible for creating a watertight closure when the gate is closed?

<p>Seals (A)</p> Signup and view all the answers

Which gate control system involves operators manually controlling gate operations using control panels, levers, or switches?

<p>Manual control (D)</p> Signup and view all the answers

What is the main disadvantage of hydraulic systems mentioned in the text?

<p>Risk of failure (C)</p> Signup and view all the answers

What type of gates are motorized systems often used for, according to the text?

<p>Large gates (A)</p> Signup and view all the answers

In gate control systems, which type of control system uses sensors, actuators, and computerized algorithms for automatic gate positioning adjustments?

<p>Automated control (C)</p> Signup and view all the answers
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