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A flow is said to be laminar when : Dated: 15 Nov, 2018 Attempts: 52 Corrects: 41 Wrongs: 11Your Answer the fluid particles move in a zig-zag way the Reynolds number is high the fluid particles move in layers parallel to the boundary None of the aboveCorrect Answer the fluid particles move in a zig-zag way the Reynolds number is high the fluid particles move in layers parallel to the boundary None of the above Show Answer Share on FacebookShare on Twitter the fluid particles move in layers parallel to the boundary2. *For the laminar flow through a circular pipe : Dated: 15 Nov, 2018 Attempts: 47 Corrects: 20 Wrongs: 27Your Answer the maximum velocity = 1.5 times the average velocity the maximum velocity = 2 times the average velocity the maximum velocity = 2.5 times the average velocity None of the aboveCorrect Answer the maximum velocity = 1.5 times the average velocity the maximum velocity = 2 times the average velocity the maximum velocity = 2.5 times the average velocity None of the above Show Answer Share on FacebookShare on Twitter the maximum velocity = 2 times the average velocity3. The loss of pressure head for the laminar flow through pipe varies : Dated: 20 Nov, 2018 Attempts: 44 Corrects: 14 Wrongs: 30Your Answer as the square of velocity directly as velocity as the inverse of velocity None of the aboveCorrect Answer as the square of velocity directly as velocity as the inverse of velocity None of the above Show Answer Share on FacebookShare on Twitter directly as velocity4. For the laminar flow through a pipe, the shear stress over the cross-section : Dated: 20 Nov, 2018 Attempts: 35 Corrects: 9 Wrongs: 26Your Answer varies inversely as the distance from the center of the pipe varies directly as the distance from the surface of the pipe varies directly as the distance from the center of the pipe remains constant over the cross sectionCorrect Answer varies inversely as the distance from the center of the pipe varies directly as the distance from the surface of the pipe varies directly as the distance from the center of the pipe remains constant over the cross section Show Answer Share on FacebookShare on Twitter varies directly as the distance from the center of the pipe5. *For the laminar flow between two parallel plates : Dated: 20 Nov, 2018 Attempts: 27 Corrects: 4 Wrongs: 23Your Answer the maximum velocity = 2 times the average velocity the maximum velocity = 2.5 times the average velocity the maximum velocity = 1.33 times the average velocity None of the aboveCorrect Answer the maximum velocity = 2 times the average velocity the maximum velocity = 2.5 times the average velocity the maximum velocity = 1.33 times the average velocity None of the above Show Answer Share on FacebookShare on Twitter None of the above6. *The value of the kinetic energy correction factor α of the laminar flow through a circular pipe is : Dated: 20 Nov, 2018 Attempts: 23 Corrects: 7 Wrongs: 16Your Answer 1.33 1.50 2 1.25Correct Answer 1.33 1.50 2 1.25 Show Answer Share on FacebookShare on Twitter 27. *The value of the momentum correction factor β for the laminar flow through a circular pipe is : Dated: 20 Nov, 2018 Attempts: 16 Corrects: 6 Wrongs: 10Your Answer 1.33 1.50 2 1.25Correct Answer 1.33 1.50 2 1.25 Show Answer Share on FacebookShare on Twitter 1.338. The pressure drop per unit length of a pipe for laminar flow is : Dated: 20 Nov, 2018 Attempts: 17 Corrects: 0 Wrongs: 17Your Answer \[\frac{{12\mu vL}}{{\rho g{D^2}}}\] \[\frac{{12\mu v}}{{\rho g{D^2}}}\] \[\frac{{32\mu vL}}{{{D^2}}}\] None of the aboveCorrect Answer \[\frac{{12\mu vL}}{{\rho g{D^2}}}\] \[\frac{{12\mu v}}{{\rho g{D^2}}}\] \[\frac{{32\mu vL}}{{{D^2}}}\] None of the above Show AnswerSee Explanation\[\begin{array}{l} f = \frac{{64}}{{{{\mathop{\rm R}\nolimits} _e}}},{{\mathop{\rm R}\nolimits} _e} = \frac{{\rho vD}}{\mu }\\ f = \frac{{64\mu }}{{\rho vD}}\\ {h_f}/L = \frac{f}{D} \times \frac{{{v^2}}}{{2g}}\\ {h_f}/L = \frac{{64\mu }}{{\rho vD}} \times \frac{1}{D} \times \frac{{{v^2}}}{{2g}} = \frac{{32\mu v}}{{\rho g{D^2}}} \end{array}\] Share on FacebookShare on Twitter \[\frac{{12\mu vL}}{{\rho g{D^2}}}\]9. *For laminar flow between two parallel plates, the pressure drop per unit length is equal to : Dated: 20 Nov, 2018 Attempts: 14 Corrects: 0 Wrongs: 14Your Answer \[\frac{{12\mu vL}}{{\rho g{D^2}}}\] \[\frac{{12\mu vL}}{{{D^2}}}\] \[\frac{{32\mu vL}}{{{D^2}}}\] \[\frac{{12\mu v}}{{{D^2}}}\]Correct Answer \[\frac{{12\mu vL}}{{\rho g{D^2}}}\] \[\frac{{12\mu vL}}{{{D^2}}}\] \[\frac{{32\mu vL}}{{{D^2}}}\] \[\frac{{12\mu v}}{{{D^2}}}\] Show Answer Share on FacebookShare on Twitter \[\frac{{12\mu v}}{{{D^2}}}\]10. The velocity distribution in laminar flow through a circular pipe follow the : Dated: 20 Nov, 2018 Attempts: 26 Corrects: 18 Wrongs: 8Your Answer parabolic law linear law logarithmic law None of the aboveCorrect Answer parabolic law linear law logarithmic law None of the above Show Answer Share on FacebookShare on Twitter parabolic lawSubmit Answers