MCQOPTIONS
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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. |
Nozzle drag varies with _________ |
| A. | position of nozzle, flight conditions, etc |
| B. | only nozzle flight conduit |
| C. | only with nozzle type |
| D. | only with nozzle pressure at combustion chamber |
| Answer» B. only nozzle flight conduit | |
| 2. |
If manufacturer’s thrust loss requirement is 3% and engine has mass flow of 20 unit then, determine how much bleed mass flow can be used? |
| A. | 0.3 unit |
| B. | 0.4 unit |
| C. | 0.8 unit |
| D. | 0.9835 unit |
| Answer» B. 0.4 unit | |
| 3. |
An engine has mass flow of 16 unit and bleed mass flow of 0.32 unit. Find the thrust loss due to the bleed air. |
| A. | 4% |
| B. | 6.98% |
| C. | 100.78% |
| D. | 21% |
| Answer» B. 6.98% | |
| 4. |
A supersonic aircraft is designed to operate at 2.0M if thrust loss is required to be less than 2% then determine the reference value of inlet pressure recovery. Given ram recovery Correction factor C is 1.2. |
| A. | 95% |
| B. | 99 |
| C. | 102 |
| D. | 70 |
| Answer» B. 99 | |
| 5. |
Engine manufacturer has provided the reference value of inlet pressure recovery as 0.94. If actual pressure recovery is found to be 0.91 then, find the thrust loss. Consider C of 1.25. |
| A. | 0.0375 |
| B. | 0.123 |
| C. | 0.0865 |
| D. | 0.568 |
| Answer» B. 0.123 | |
| 6. |
A subsonic flight has actual inlet pressure recovery of 0.975. Estimate the thrust loss by this subsonic engine. |
| A. | 3.37% |
| B. | 56% |
| C. | 2.5% |
| D. | 11.22% |
| Answer» B. 56% | |
| 7. |
A manufacturer’s uninstalled engine is required to operate at 1.8M. Find the reference pressure recovery based on military standard. |
| A. | 94.45% |
| B. | 12.56% |
| C. | 45.97% |
| D. | 100% |
| Answer» B. 12.56% | |
| 8. |
The installed net propulsive force is defined as _________ |
| A. | installed engine thrust minus the drag due to inlet, nozzle and throttle dependent trim drag |
| B. | uninstalled thrust plus drag due to inlet and nozzle |
| C. | installed lift by drag |
| D. | installer wing loading |
| Answer» B. uninstalled thrust plus drag due to inlet and nozzle | |
| 9. |
What do you mean by installed engine thrust? |
| A. | Actual thrust produced by an engine when installed |
| B. | Actual thrust when not installed |
| C. | Lifting property |
| D. | Installed wing lift |
| Answer» B. Actual thrust when not installed | |
| 10. |
Fudge factor is used to obtain ______________ |
| A. | manufacturer’s uninstalled engine thrust |
| B. | thrust loading and wing loading |
| C. | lofting |
| D. | lift to drag ratio |
| Answer» B. thrust loading and wing loading | |
| 11. |
The actual available thrust used in performance calculations is termed as __________ |
| A. | installed net propulsive force |
| B. | lift to drag ratio |
| C. | installed weight to reference area |
| D. | gross lift and weight |
| Answer» B. lift to drag ratio | |