McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
Chapters
| 101. |
Drag force is affected by__________ |
| A. | Cross sectional area and smoothness |
| B. | Rigidity and density |
| C. | Pressure and temperature |
| D. | Mass |
| Answer» A. Cross sectional area and smoothness | |
| Explanation: Drag force is affected by cross sectional area and smoothness. If it is affected by cross sectional area, then it is called form drag. If it is affected by surface smoothness, then it is called as surface drag. | |
| 102. |
The lift force acts in _____ to the flow velocity. |
| A. | Perpendicular direction |
| B. | Same direction |
| C. | Opposite direction |
| D. | Different directions |
| Answer» A. Perpendicular direction | |
| Explanation: The lift force acts in the perpendicular direction to that of the relative flow velocity. It acts in the perpendicular direction with respect to a surrounding fluid flow. Thus, option Perpendicular direction is correct. | |
| 103. |
Which among the following is the correct formula for drag? |
| A. | D = Cd * A * 0.5 * r * V2 |
| B. | D = Cd * A * 0.5 * r * V*2 |
| C. | D = Cd * A * 0.5 * r * V/2 |
| D. | D = 0.5 * r * V |
| Answer» A. D = Cd * A * 0.5 * r * V2 | |
| Explanation: The drag force acts in the opposite direction to that of the relative flow velocity. It acts in the opposite direction with respect to a surrounding fluid flow. Thus, the correct option is D = Cd * A * 0.5 * r * V2. | |
| 104. |
Which among the following is the correct formula for lift? |
| A. | D = Cl * A * 0.5 * r * V2 |
| B. | D = Cl * A * 0.5 * r * V*2 |
| C. | D = Cl * A * 0.5 * r * V/2 |
| D. | D = 0.5 * r * V |
| Answer» A. D = Cl * A * 0.5 * r * V2 | |
| Explanation: The lift force is a force that acts in the perpendicular direction to that of the relative flow velocity. It acts in the perpendicular direction with respect to a surrounding fluid flow. Thus, the correct option is D = Cl * A * 0.5 * r * V2. | |
Done Studing? Take A Test.
Great job completing your study session! Now it's time to put your knowledge to the test. Challenge yourself, see how much you've learned, and identify areas for improvement. Don’t worry, this is all part of the journey to mastery. Ready for the next step? Take a quiz to solidify what you've just studied.