Civil Engineering (CE) Exam  >  Civil Engineering (CE) Questions  >  Consider fully developed laminar flow in a ci... Start Learning for Free
Consider fully developed laminar flow in a circular pipe of a fixed length:
1) The friction factor is inversely proportional to Reynolds number
2) The pressure drop in the pipe is proportional to the average velocity of the flow in the pipe
3) The friction factor is higher for a rough pipe as compared to a smooth pipe
4) The pressure drop in the pipe is proportional to the square of average of flow in the pipe.
Which of the above statements are correct?
  • a)
    1 and 4
  • b)
    3 and 4
  • c)
    2 and 3
  • d)
    1 and 2
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Consider fully developed laminar flow in a circular pipe of a fixed le...
Understanding Fully Developed Laminar Flow in a Circular Pipe
In a circular pipe under fully developed laminar flow, the following concepts are fundamental:
1. Friction Factor and Reynolds Number
- The friction factor (f) is inversely proportional to the Reynolds number (Re) for laminar flow.
- This means as the Reynolds number increases, the friction factor decreases. For laminar flow, f = 64/Re.
2. Pressure Drop and Average Velocity
- The pressure drop (ΔP) in the pipe is directly proportional to the average velocity (V) of the flow.
- This is expressed as ΔP = f * (L/D) * (ρV²/2), where L is the length, D is the diameter, and ρ is the fluid density. In laminar flow, this relation holds true, making this statement correct.
3. Friction Factor for Rough vs. Smooth Pipes
- In laminar flow, the friction factor does not depend on the surface roughness of the pipe. The friction factor is determined solely by the Reynolds number.
- Thus, the statement that the friction factor is higher for a rough pipe compared to a smooth pipe is incorrect for laminar flow.
4. Pressure Drop and Average Velocity Squared
- The statement that pressure drop is proportional to the square of the average velocity is true in turbulent flow, not laminar flow.
- In laminar flow, it is proportional to the average velocity, not its square.
Conclusion
Therefore, the correct statements are:
- Statement 1 (Correct)
- Statement 2 (Correct)
- Statement 3 (Incorrect)
- Statement 4 (Incorrect)
Thus, the correct answer is option 'D' (1 and 2).
Explore Courses for Civil Engineering (CE) exam

Top Courses for Civil Engineering (CE)

Consider fully developed laminar flow in a circular pipe of a fixed length:1) The friction factor is inversely proportional to Reynolds number2) The pressure drop in the pipe is proportional to the average velocity of the flow in the pipe3) The friction factor is higher for a rough pipe as compared to a smooth pipe4) The pressure drop in the pipe is proportional to the square of average of flow in the pipe.Which of the above statements are correct?a)1 and 4b)3 and 4c)2 and 3d)1 and 2Correct answer is option 'D'. Can you explain this answer?
Question Description
Consider fully developed laminar flow in a circular pipe of a fixed length:1) The friction factor is inversely proportional to Reynolds number2) The pressure drop in the pipe is proportional to the average velocity of the flow in the pipe3) The friction factor is higher for a rough pipe as compared to a smooth pipe4) The pressure drop in the pipe is proportional to the square of average of flow in the pipe.Which of the above statements are correct?a)1 and 4b)3 and 4c)2 and 3d)1 and 2Correct answer is option 'D'. 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 Consider fully developed laminar flow in a circular pipe of a fixed length:1) The friction factor is inversely proportional to Reynolds number2) The pressure drop in the pipe is proportional to the average velocity of the flow in the pipe3) The friction factor is higher for a rough pipe as compared to a smooth pipe4) The pressure drop in the pipe is proportional to the square of average of flow in the pipe.Which of the above statements are correct?a)1 and 4b)3 and 4c)2 and 3d)1 and 2Correct answer is option 'D'. 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 Consider fully developed laminar flow in a circular pipe of a fixed length:1) The friction factor is inversely proportional to Reynolds number2) The pressure drop in the pipe is proportional to the average velocity of the flow in the pipe3) The friction factor is higher for a rough pipe as compared to a smooth pipe4) The pressure drop in the pipe is proportional to the square of average of flow in the pipe.Which of the above statements are correct?a)1 and 4b)3 and 4c)2 and 3d)1 and 2Correct answer is option 'D'. Can you explain this answer?.
Solutions for Consider fully developed laminar flow in a circular pipe of a fixed length:1) The friction factor is inversely proportional to Reynolds number2) The pressure drop in the pipe is proportional to the average velocity of the flow in the pipe3) The friction factor is higher for a rough pipe as compared to a smooth pipe4) The pressure drop in the pipe is proportional to the square of average of flow in the pipe.Which of the above statements are correct?a)1 and 4b)3 and 4c)2 and 3d)1 and 2Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Civil Engineering (CE). Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free.
Here you can find the meaning of Consider fully developed laminar flow in a circular pipe of a fixed length:1) The friction factor is inversely proportional to Reynolds number2) The pressure drop in the pipe is proportional to the average velocity of the flow in the pipe3) The friction factor is higher for a rough pipe as compared to a smooth pipe4) The pressure drop in the pipe is proportional to the square of average of flow in the pipe.Which of the above statements are correct?a)1 and 4b)3 and 4c)2 and 3d)1 and 2Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Consider fully developed laminar flow in a circular pipe of a fixed length:1) The friction factor is inversely proportional to Reynolds number2) The pressure drop in the pipe is proportional to the average velocity of the flow in the pipe3) The friction factor is higher for a rough pipe as compared to a smooth pipe4) The pressure drop in the pipe is proportional to the square of average of flow in the pipe.Which of the above statements are correct?a)1 and 4b)3 and 4c)2 and 3d)1 and 2Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Consider fully developed laminar flow in a circular pipe of a fixed length:1) The friction factor is inversely proportional to Reynolds number2) The pressure drop in the pipe is proportional to the average velocity of the flow in the pipe3) The friction factor is higher for a rough pipe as compared to a smooth pipe4) The pressure drop in the pipe is proportional to the square of average of flow in the pipe.Which of the above statements are correct?a)1 and 4b)3 and 4c)2 and 3d)1 and 2Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Consider fully developed laminar flow in a circular pipe of a fixed length:1) The friction factor is inversely proportional to Reynolds number2) The pressure drop in the pipe is proportional to the average velocity of the flow in the pipe3) The friction factor is higher for a rough pipe as compared to a smooth pipe4) The pressure drop in the pipe is proportional to the square of average of flow in the pipe.Which of the above statements are correct?a)1 and 4b)3 and 4c)2 and 3d)1 and 2Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Consider fully developed laminar flow in a circular pipe of a fixed length:1) The friction factor is inversely proportional to Reynolds number2) The pressure drop in the pipe is proportional to the average velocity of the flow in the pipe3) The friction factor is higher for a rough pipe as compared to a smooth pipe4) The pressure drop in the pipe is proportional to the square of average of flow in the pipe.Which of the above statements are correct?a)1 and 4b)3 and 4c)2 and 3d)1 and 2Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Civil Engineering (CE) tests.
Explore Courses for Civil Engineering (CE) exam

Top Courses for Civil Engineering (CE)

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev