What is an adverse pressure gradient? (9.2) A. Where pressure increases with distance downstream O..

What is an adverse pressure gradient? (9.2) A. Where pressure increases with distance downstream O B. Where pressure decreases with distance downstream C. Where pressure is uniform in the flow D. Where pressure is pushing the iow downstream QUESTION 2 (T2) Where does an adverse pressure gradient occur on an airfoil? (9.2) O A. Leading edge O B. Near or after the point of maximum thickness O C.Only in a region where the boundary layer is turbulent O D.Only in a region where the boundary layer is laminar QUESTION 3 (T3) What is pressure drag? (9.5) Drag due to skin friction Drag due to separation Drag due to turbulence QUESTION 4 (D1) In order for flow to separate, (9.3) O A the boundary layer must first have transitioned from a laminar boundary layer to turbulent boundary layer the boundary layer must first have transitioned from a turbulent boundary layer to laminar boundary layer the flow must be in a favorable pressure gradient the flow must be in an adverse pressure gradient the surface must be dimpled QUESTION 5 (D2) The Reynolds number is a non-dimensional parameter that illustrates the relative magnitude of the momentum of the flow versus viscous force of the fluid. Flow A has a Reynolds number of 1,000,000. Flow B has a Reynolds number of 10,000? What conclusions can you draw? (8.7) O A Flow B has a greater ratio of momentum torces to viscous torc es O B. Flow A has a greater ratio of momentum forces to viscous forces Nothing can be discemed about the two flows using their Reynolds numbers QUESTION 6 (D3) Because many of aerodynamic principles are based on Reynolds number, matching the Reynolds number can matter more than matching scale or velocity for many estects. We use this principle with a water tunnel where the increased density allows O A smaller,velocities B larger, velocities O C. larger, angles-or-attack models to be tested at lower_ while still matching realtworld results. (8.T) D smaller, angles-of-attack