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Question 1 of 4
1. Question1 pointsCategory: MECHANICAL OPERATIONS
A propeller (diameter D = 15 m) rotates at N = 1 revolution per second (rps). To understand the flow around the propeller, a lab-scale model is made. Important parameters to study the flow are velocity of the propeller tip (V = πND) , diameter D and acceleration due to gravity (g). The lab-scale model is 1/100th of the size of the actual propeller.The rotation speed of the lab-scale model, to the nearest integer, should be _________ rps.Correct
Question 2 of 4
2. Question1 pointsCategory: FLUID MECHANICS
Oil is being delivered at a steady state flow rate through a circular pipe of a radius 1.25 ×10-² m and length 10 m. The pressure drop access the pipe is 500 Pa.The shear stress at the pipe wall, rounded to 2 decimal places______ PaCorrect
Question 3 of 4
3. Question2 pointsCategory: FLUID MECHANICS
The following table provides four sets of Fanning friction factor data, for different values of Reynolds number (Re) and roughness factor (K/D).
Which of the above sets of friction factor data is correct?Correct
Question 4 of 4
4. Question1 pointsCategory: FLUID MECHANICS
In a venturimeter, ΔP1 and ΔP2 are the pressure drops corresponding to volumetric flowrates Q1 and Q2 . If Q2/Q1 =2, then ΔP2/ΔP1 equals