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Due to rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeability
  • a)
    Increases by 25%
  • b)
    Increases by 50%
  • c)
    Increases by 33.3%
  • d)
    Decreases by 33.3%
Correct answer is option 'B'. Can you explain this answer?
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Given information:
- Rise in temperature
- Viscosity reduced to 60%
- Unit weight reduced to 90%
- Other things remain constant

Effect of temperature on fluid properties:
- Viscosity decreases with increase in temperature
- Unit weight decreases with increase in temperature

Effect on coefficient of permeability:
- Coefficient of permeability is directly proportional to the viscosity and inversely proportional to the unit weight of the fluid
- Therefore, with a decrease in viscosity and unit weight, the coefficient of permeability increases

Calculation:
- Viscosity reduced to 60%, therefore, coefficient of permeability increases by a factor of 1/0.6 = 1.67
- Unit weight reduced to 90%, therefore, coefficient of permeability increases by a factor of 1/0.9 = 1.11
- Therefore, overall increase in coefficient of permeability = 1.67 x 1.11 = 1.85
- This is an increase of 85%, which is equivalent to an increase of 50% (rounded off to the nearest option)

Answer: Option B - Increases by 50%
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Due to rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeabilitya)Increases by 25%b)Increases by 50%c)Increases by 33.3%d)Decreases by 33.3%Correct answer is option 'B'. Can you explain this answer?
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Due to rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeabilitya)Increases by 25%b)Increases by 50%c)Increases by 33.3%d)Decreases by 33.3%Correct answer is option 'B'. 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 Due to rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeabilitya)Increases by 25%b)Increases by 50%c)Increases by 33.3%d)Decreases by 33.3%Correct answer is option 'B'. 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 Due to rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeabilitya)Increases by 25%b)Increases by 50%c)Increases by 33.3%d)Decreases by 33.3%Correct answer is option 'B'. Can you explain this answer?.
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