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Three parallel pipes connected at the two ends have flowrates Q1, Q2, and Q3, respectively, and the corresponding frictional head losses are hL1, hL2, and hL3 respectively. The correct expressions for total flow rate (Q) and frictional head loss across the two ends (hL) are
  • a)
    Q = Q1 + Q2 + Q3; hL = hL1 + hL2 + hL3
  • b)
    Q = Q1 + Q2 + Q3; hL = hL1 = hL2 = hL3
  • c)
    Q = Q1 = Q2 = Q3; hL = hL1 + hL2 + hL3
  • d)
    Q = Q1 = Q2 = Q3; hL = hL1 = hL2 = hL3
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Three parallel pipes connected at the two ends have flowrates Q1, Q2, ...
Total flow rate, Q = Q1 + Q2 + Q3 and frictional head loss,
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Most Upvoted Answer
Three parallel pipes connected at the two ends have flowrates Q1, Q2, ...
Explanation:

Flowrate in Parallel Pipes:
- When pipes are connected in parallel, the total flow rate (Q) is the sum of individual flow rates in each pipe.
- Therefore, Q = Q1 + Q2 + Q3.

Frictional Head Loss in Parallel Pipes:
- The frictional head loss in each pipe is independent of the others when they are connected in parallel.
- Therefore, the total frictional head loss (hL) across the two ends is equal to the sum of individual head losses in each pipe.
- Hence, hL = hL1 + hL2 + hL3.
Therefore, the correct expressions for the total flow rate and frictional head loss across the two ends when three parallel pipes are connected are:
- Q = Q1 + Q2 + Q3
- hL = hL1 + hL2 + hL3
This explains why option 'B' is the correct answer.
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Question Description
Three parallel pipes connected at the two ends have flowrates Q1, Q2, and Q3, respectively, and the corresponding frictional head losses are hL1, hL2, and hL3 respectively. The correct expressions for total flow rate (Q) and frictional head loss across the two ends (hL) area)Q = Q1 + Q2 + Q3; hL = hL1 + hL2 + hL3b)Q = Q1 + Q2 + Q3; hL = hL1 = hL2 = hL3c)Q = Q1 = Q2 = Q3; hL = hL1 + hL2 + hL3d)Q = Q1 = Q2 = Q3; hL = hL1 = hL2 = hL3Correct answer is option 'B'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Three parallel pipes connected at the two ends have flowrates Q1, Q2, and Q3, respectively, and the corresponding frictional head losses are hL1, hL2, and hL3 respectively. The correct expressions for total flow rate (Q) and frictional head loss across the two ends (hL) area)Q = Q1 + Q2 + Q3; hL = hL1 + hL2 + hL3b)Q = Q1 + Q2 + Q3; hL = hL1 = hL2 = hL3c)Q = Q1 = Q2 = Q3; hL = hL1 + hL2 + hL3d)Q = Q1 = Q2 = Q3; hL = hL1 = hL2 = hL3Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Three parallel pipes connected at the two ends have flowrates Q1, Q2, and Q3, respectively, and the corresponding frictional head losses are hL1, hL2, and hL3 respectively. The correct expressions for total flow rate (Q) and frictional head loss across the two ends (hL) area)Q = Q1 + Q2 + Q3; hL = hL1 + hL2 + hL3b)Q = Q1 + Q2 + Q3; hL = hL1 = hL2 = hL3c)Q = Q1 = Q2 = Q3; hL = hL1 + hL2 + hL3d)Q = Q1 = Q2 = Q3; hL = hL1 = hL2 = hL3Correct answer is option 'B'. Can you explain this answer?.
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