【Daily Question】Chemical Engineering Principles 141: Stagnant Flow (August 14)
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The last edit to this post was made by Desert Fish on 2015-8-14 at 08:08. The Chemical Engineering Theory section is now launching a \"One Question per Day\" activity aimed at helping everyone reinforce their basic knowledge in chemical engineering. Subsequent series such as \"Chemical Engineering Principles,\" \"Mass Transfer and Separation,\" \"Chemical Engineering Thermodynamics,\" and \"Chemical Engineering Processes\" will also be introduced. We hope for your active support! Answers to the questions in the \"One Question per Day\" activity can be viewed directly, and the thread will be closed after 1 day! ! You get 2 wealth points just for participating, and an additional 3 wealth points if you answer correctly~~~ Multiple-choice question: When water flows stably in a circular straight pipe at a constant velocity, if the diameter of the pipe is doubled, the friction loss will be ( ) of the original value. A. 1/4 B. 1/2 C. 2 times A
When water flows stably in a circular straight pipe at a constant velocity, if the diameter of the pipe is doubled, the friction loss becomes (A) times the original value. A. 1/4 B. 1/2 C. 2 times
When water flows stably in a circular straight pipe at a constant velocity, if the diameter of the pipe is doubled, the friction loss becomes (A. 1/4) of the original value.
A. 1/4 A. 1/4 A. 1/4 A. 1/4 A. 1/4 A. 1/4 A. 1/4 A. 1/4 A. 1/4
My answer is A. Analysis: Laminar flow, also known as steady flow, has a resistance loss equation of hf=32x viscosity x length of pipe x velocity/(density x square of pipe diameter)
Multiple-choice question: Water flows in laminar flow within a circular straight pipe at a constant velocity; if the diameter of the pipe is doubled, the friction loss becomes (A) times the original value. A. 1/4 B. 1/2 C. 2 times
When water flows in a circular straight pipe with steady flow velocity, if the diameter of the pipe is doubled, the friction loss becomes (A) times the original value. A. 1/4 B. 1/2 C. 2 times
When water flows in a circular straight pipe with steady flow velocity, if the diameter of the pipe is doubled, the friction loss becomes (A) times the original value. In laminar flow in a circular pipe, the pipe resistance is proportional to the flow velocity and inversely proportional to the square of the pipe diameter
B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oh, that’s wrong. For laminar flow, it should be 1/4, so option A is correct; for turbulent flow, it’s 1/2, so option B is correct