Physics ETEA MCQs

By: Prof. Dr. Fazal Rehman | Last updated: May 20, 2025

1. : To delay the separation of the flow, which of the following visualization types are used?
(A) PVT
(B) Surface oil film technique
(C) Smoke flow visualization
(D) Shadow projecting

2. : Drag on the cylinder is made due to?
(A) Viscous effect
(B) Friction
(C) Boundary layer
(D) Surface layer

3. : Which of the following is lift upon cylinder?
(A) One
(B) Zero
(C) Negative
(D) Greater than zero

4. : When the cylinder is placed in the wind tunnel, what is the position of the stagnation point?
(A) Lower part
(B) Upper part
(C) Middle part
(D) No stagnation point

5. : By installing the small cylinder, how much is the drag reduced?
(A) 48%
(B) 65%
(C) 40%
(D) 85%

6. : Which of the following techniques of visualization are in the quantitative flow?
(A) Smoke flow visualization
(B) Surface framing
(C) Shadow projecting
(D) Shadow graphic technique

7. : By which of the following is finite lift in the cylinder measured?
(A) Moving up and down
(B) Moving up
(C) Moving left and right
(D) Spinning cylinder

8. : Because of what is more drag created by the circular cylinder?
(A) The difference of pressure between the downstream and upstream direction of flow
(B) The difference of pressure between downstream and relative wind direction of flow
(C) The difference of pressure between direction and upstream of the flow
(D) The difference of pressure between downstream of the flow

9. : In the wind tunnel test, the cylinder vibrates due to?
(A) High pressure
(B) Low pressure
(C) Relative pressure
(D) Fluctuations in the flow

10. : To reduce the drag coefficient over a cylinder, which of the following methods of passive flow control is used?
(A) Surface framing
(B) Flow visualization
(C) Roughened surfaces
(D) Wiring surfaces

11. : At the top of the cylinder, which of the following is the velocity flow?
(A) Higher
(B) Lower
(C) Constant
(D) Does not vary