Question

Flude

l. (296) For symmetrical airfoil, te line that connects the middle points between the upper and the lower cambers A) Leading edge B) Camber line C) Chord line D) B and C 2. (2%) For symmetrical airfoil, at zero angle of attack the coefficient of lift will be A) negative B) Zero C) Positive D) Depend on Geometry 3, (2%) For a fixed angle of attack, where Mach number is 0.6 and with large Reynolds number, the coefficient of drag will depend on: A) Mach Number B) Reynolds number C) Air velocity D) A and E 4. (5%) Compare between open loop and closed loop wind tunnel (mention at least 3 characteristics for each). 5. (2%) Calculating losses in pipe systems can assist m: A) Designing an efficient system B) Determining the pump required C) Determine the major losses and minor losses D) All the above 2

Answer 1

(amber Line Gmbe iu te Comon Mean Camben n -hu locus 얼ttu hetcuen an