MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
Find the ratio of weight to length of the turboprop engine which has bhp of 3000. |
| A. | 12.6 |
| B. | 60.12 |
| C. | 60.012 |
| D. | 60.1206 |
| Answer» B. 60.12 | |
| 2. |
A turboprop engine is to be scaled from an existing engine. If scale factor is 0.85 then, what will be the value of diameter of our engine? Given actual diameter of selected existing engine is 8.56unit. |
| A. | 8.4 unit |
| B. | 23 |
| C. | 0.89 |
| D. | 9.123 |
| Answer» B. 23 | |
| 3. |
A turboprop engine is designed to generate bhp of 2500. Estimate the appropriate weight of the engine based on statistical models. |
| A. | 893.84 lb. |
| B. | 21kg |
| C. | 4555lb |
| D. | 321 slug |
| Answer» B. 21kg | |
| 4. |
Scaling factor of turboprop engine is 1.2. If, the actual length of an existing turboprop engine is 12 unit then, what will be the length of scaled engine? |
| A. | 23.68 |
| B. | 56.6 |
| C. | 12 |
| D. | 32 |
| Answer» B. 56.6 | |
| 5. |
Which of the following is an example of a cooling system? |
| A. | Downdraft cooling |
| B. | Downdraft lofting |
| C. | Sideway lofting |
| D. | Sideway circulation |
| Answer» B. Downdraft lofting | |
| 6. |
Let’s consider we need to design a propeller engine which has 3 blades. What will be the typical value of propeller diameter? Engine is expected to produce 400 Hp of power. |
| A. | 80.5 unit |
| B. | 129 |
| C. | 128.94 |
| D. | 129.95 |
| Answer» B. 129 | |
| 7. |
If a propeller is designed to have 200 Hp then find the appropriate diameter for the propeller. Consider 2 blades. |
| A. | 82.73 unit |
| B. | 210 |
| C. | 34.56 |
| D. | 180 |
| Answer» B. 210 | |
| 8. |
Which of the following is correct for two blade propeller? |
| A. | Diameter d = 22*(Hp)0.25 |
| B. | Diameter d = 22*(Hp)0.56 |
| C. | Diameter d = 12.22*(Hp)0.25 |
| D. | Diameter d = 2.2 ft |
| Answer» B. Diameter d = 22*(Hp)0.56 | |
| 9. |
If propeller has static tip speed of 600 ft. per second then, find diameter of propeller. Given n = 1250rpm. |
| A. | 9.167 |
| B. | 19.8976 |
| C. | 23.96 |
| D. | 3.2876 |
| Answer» B. 19.8976 | |
| 10. |
Propeller has diameter of 25 unit. What will be the static tip speed of the propeller? (Given n = 1200rpm.) |
| A. | 1570.8 unit |
| B. | 3004.5 |
| C. | 2345.67 unit |
| D. | 7643.23 |
| Answer» B. 3004.5 | |
| 11. |
Helical tip speed is given by ____________ |
| A. | \(\sqrt{Vtip^2+ V^2}\) |
| B. | 2*ᴨ*d |
| C. | CL*d |
| D. | Drag*Lift |
| Answer» B. 2*ᴨ*d | |
| 12. |
What is the old thumb rule to design a propeller? |
| A. | Keep it as long as possible |
| B. | Keep it as short as possible |
| C. | Keep it as short and wide as possible |
| D. | Keep it as half of diameter always |
| Answer» B. Keep it as short as possible | |