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An earthquake acceleration of 0.1 g acting vertically downward causes in a gravity dam
- a)an increase in the weight of dam by 10%
- b)a reduction in the unit weight of concrete only by 10%
- c)a decrease in the unit weights of concrete and water by 10%
- d)a decreases in the unit weights of water by 10%
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
An earthquake acceleration of 0.1 g acting vertically downward causes ...
Effective unit weight is given by,
so when αv = 0.1 g (downward)
effective unit weight
Net effective weight of Dam
so when αv = 0.1 g (downward)
effective unit weight
Net effective weight of Dam
Most Upvoted Answer
An earthquake acceleration of 0.1 g acting vertically downward causes ...
Explanation:
An earthquake acceleration of 0.1 g acting vertically downward causes a decrease in the unit weights of concrete and water by 10%. Let's break down the explanation into different parts:
1. Earthquake Acceleration:
An earthquake acceleration is the measure of the force exerted on structures during an earthquake. It is usually expressed in terms of "g" which is the acceleration due to gravity. In this case, the earthquake acceleration is 0.1 g, which means it is one-tenth of the acceleration due to gravity.
2. Effect on Unit Weight:
The unit weight of a substance is the weight per unit volume. In this case, we are considering the unit weights of concrete and water.
3. Decrease in Unit Weight:
Due to the vertical downward acceleration of the earthquake, the effective weight of the dam increases. This is because the force exerted by the earthquake adds to the weight of the dam.
To maintain the equilibrium, the dam needs to adjust its unit weights. When there is a vertical acceleration, the unit weights of both concrete and water decrease by 10%.
4. Explanation of Option C:
Option C states that there is a decrease in the unit weights of concrete and water by 10%. This is the correct answer because the earthquake acceleration affects both concrete and water, leading to a decrease in their unit weights.
5. Other Options:
The other options are incorrect because they do not consider the decrease in the unit weights of concrete and water due to the earthquake acceleration.
- Option A states that there is an increase in the weight of the dam by 10%. This is incorrect because the weight of the dam does not increase, but the unit weights of the constituent materials decrease.
- Option B states that there is a reduction in the unit weight of concrete only by 10%. This is incorrect because both concrete and water are affected by the earthquake acceleration.
- Option D states that there is a decrease in the unit weights of water by 10%. This is incorrect because both concrete and water are affected by the earthquake acceleration.
In conclusion, option C is the correct answer as it accurately describes the effect of a vertical downward earthquake acceleration on the unit weights of concrete and water in a dam.
An earthquake acceleration of 0.1 g acting vertically downward causes a decrease in the unit weights of concrete and water by 10%. Let's break down the explanation into different parts:
1. Earthquake Acceleration:
An earthquake acceleration is the measure of the force exerted on structures during an earthquake. It is usually expressed in terms of "g" which is the acceleration due to gravity. In this case, the earthquake acceleration is 0.1 g, which means it is one-tenth of the acceleration due to gravity.
2. Effect on Unit Weight:
The unit weight of a substance is the weight per unit volume. In this case, we are considering the unit weights of concrete and water.
3. Decrease in Unit Weight:
Due to the vertical downward acceleration of the earthquake, the effective weight of the dam increases. This is because the force exerted by the earthquake adds to the weight of the dam.
To maintain the equilibrium, the dam needs to adjust its unit weights. When there is a vertical acceleration, the unit weights of both concrete and water decrease by 10%.
4. Explanation of Option C:
Option C states that there is a decrease in the unit weights of concrete and water by 10%. This is the correct answer because the earthquake acceleration affects both concrete and water, leading to a decrease in their unit weights.
5. Other Options:
The other options are incorrect because they do not consider the decrease in the unit weights of concrete and water due to the earthquake acceleration.
- Option A states that there is an increase in the weight of the dam by 10%. This is incorrect because the weight of the dam does not increase, but the unit weights of the constituent materials decrease.
- Option B states that there is a reduction in the unit weight of concrete only by 10%. This is incorrect because both concrete and water are affected by the earthquake acceleration.
- Option D states that there is a decrease in the unit weights of water by 10%. This is incorrect because both concrete and water are affected by the earthquake acceleration.
In conclusion, option C is the correct answer as it accurately describes the effect of a vertical downward earthquake acceleration on the unit weights of concrete and water in a dam.
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An earthquake acceleration of 0.1 g acting vertically downward causes in a gravity dama)an increase in the weight of dam by 10%b)a reduction in the unit weight of concrete only by 10%c)a decrease in the unit weights of concrete and water by 10%d)a decreases in the unit weights of water by 10%Correct answer is option 'C'. Can you explain this answer?
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An earthquake acceleration of 0.1 g acting vertically downward causes in a gravity dama)an increase in the weight of dam by 10%b)a reduction in the unit weight of concrete only by 10%c)a decrease in the unit weights of concrete and water by 10%d)a decreases in the unit weights of water by 10%Correct answer is option 'C'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about An earthquake acceleration of 0.1 g acting vertically downward causes in a gravity dama)an increase in the weight of dam by 10%b)a reduction in the unit weight of concrete only by 10%c)a decrease in the unit weights of concrete and water by 10%d)a decreases in the unit weights of water by 10%Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An earthquake acceleration of 0.1 g acting vertically downward causes in a gravity dama)an increase in the weight of dam by 10%b)a reduction in the unit weight of concrete only by 10%c)a decrease in the unit weights of concrete and water by 10%d)a decreases in the unit weights of water by 10%Correct answer is option 'C'. Can you explain this answer?.
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