MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Aircraft Design knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is correct for nacelle form factor (FF)? |
| A. | FF = 1+(0.35/f) |
| B. | FF = 1*(0.35/f) |
| C. | FF = 1-(0.35/f) |
| D. | FF = 1/(0.35/f) |
| Answer» B. FF = 1*(0.35/f) | |
| 2. |
Determine Flat plate skin friction coefficient if Reynolds number is 123500. Consider flow to be laminar. |
| A. | 0.0038 |
| B. | 1.234 |
| C. | 0.045 |
| D. | 123500 |
| Answer» B. 1.234 | |
| 3. |
Flat plate skin friction coefficient depends upon _____________ |
| A. | mach number only |
| B. | reynolds number only |
| C. | mach number, reynolds number etc |
| D. | weight of the aircraft |
| Answer» B. reynolds number only | |
| 4. |
Determine the value of form factor for fuselage if fuselage fineness ratio f is 1.2. |
| A. | 35.725 |
| B. | 12 |
| C. | 100 |
| D. | 423.2 |
| Answer» B. 12 | |
| 5. |
Find the approximate value of wetted area Swet for given reference area of Sref=20 unit and parasite drag coefficient of 0.0028. Consider equivalent skin friction coefficient Cf as 0.003. |
| A. | 18.67 unit |
| B. | 12 unit |
| C. | 20 unit |
| D. | 65 unit |
| Answer» B. 12 unit | |
| 6. |
Consider equivalent skin friction coefficient as 0.0025 and Swet/Sref = 0.6. Evaluate parasite drag. |
| A. | 0.0015 |
| B. | 02.34 |
| C. | 1.23 |
| D. | 0.000025 |
| Answer» B. 02.34 | |
| 7. |
Determine the initial estimation of parasite drag coefficient if, equivalent skin friction coefficient is 0.004 and ratio of wetted area to the reference area is 0.8. |
| A. | 0.0032 |
| B. | 1.2 |
| C. | 4.2 |
| D. | 0.04 |
| Answer» B. 1.2 | |
| 8. |
To get initial estimation of the parasite drag, aircraft wetted area can be multiplied by _____ |
| A. | equivalent skin friction coefficient |
| B. | weight |
| C. | lift |
| D. | wing span |
| Answer» B. weight | |
| 9. |
Equivalent skin friction coefficient may include ______________ |
| A. | skin friction and separation drag |
| B. | only wave drag |
| C. | only skin friction drag |
| D. | only thrust loading |
| Answer» B. only wave drag | |
| 10. |
Equivalent skin friction coefficient can be used to provide initial estimation of the parasite drag. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
Which of the following is a method for estimating the potato drag? |
| A. | Equivalent skin friction method |
| B. | Mach number |
| C. | Weight only |
| D. | Conceptual design |
| Answer» B. Mach number | |