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. |
To improve IR detection of engine, we can ____________ |
| A. | hide the nozzle from expected location of an IR sensor |
| B. | use higher exhaust temperature |
| C. | show nozzle at IR sensor |
| D. | nozzle does not affect the IR detection |
| Answer» B. use higher exhaust temperature | |
| 2. |
Sun glint affects the IR detection of an aircraft. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Which of the following is one of the countermeasures for IR detection? |
| A. | Decoy |
| B. | Temperature increase |
| C. | Engine exhaust temperature increase |
| D. | Not mixing plume with outside air |
| Answer» B. Temperature increase | |
| 4. |
Plume emissions can be reduced by ___________ |
| A. | quickly mixing exhaust with outside air |
| B. | increasing exhaust temperature |
| C. | increasing engine outlet temperature |
| D. | increasing plume temperature |
| Answer» B. increasing exhaust temperature | |
| 5. |
A military aircraft can use _____ as a countermeasure for IR detection. |
| A. | flares |
| B. | lift |
| C. | glares |
| D. | engine temperature increase |
| Answer» B. lift | |
| 6. |
An aircraft is flying with Mach 2.0. Calculate recovery temperature if ambient temperature is 305K. Assume recovery factor is 0.85. |
| A. | 512.4K |
| B. | 253.2K |
| C. | 100 C |
| D. | 400 C |
| Answer» B. 253.2K | |
| 7. |
Which of the following is primarily responsible for an IR signature? |
| A. | Engine exhaust |
| B. | Passenger |
| C. | Fuel tank |
| D. | Cabin crew |
| Answer» B. Passenger | |
| 8. |
What is an IR signature of an aircraft? |
| A. | Total of detectable emissions and reflections |
| B. | Sum of some emissions only |
| C. | Only reflections |
| D. | Only refraction |
| Answer» B. Sum of some emissions only | |
| 9. |
Calculate the irradiance E in W/cm2 if, radiant intensity I is 10 W/sr and range R is 10cm. |
| A. | 0.1 |
| B. | 0.001 |
| C. | 0.45 |
| D. | 10 |
| Answer» B. 0.001 | |
| 10. |
In general, an IR detector will respond to? |
| A. | Irradiance |
| B. | Rotational fluid |
| C. | Rotational force |
| D. | RCS |
| Answer» B. Rotational fluid | |
| 11. |
An aircraft does not emit any IR radiation. |
| A. | True |
| B. | False |
| Answer» C. | |