MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
How to reduce engine noise? |
| A. | By using chevron nozzle |
| B. | By using high velocity jet |
| C. | Using small diameter and high velocity jet |
| D. | Higher exhaust jet with less diameter of exhaust |
| Answer» B. By using high velocity jet | |
| 2. |
By directing the exhaust away from the ground we can _____________ |
| A. | reduce the aural signature |
| B. | increase the aural signature |
| C. | increase noise |
| D. | noise is not dependent on the direction of exhaust |
| Answer» B. increase the aural signature | |
| 3. |
Let s consider a propeller aircraft propeller diameter of 24 feet then, what would be the minimum value of clearance that is required for safe operation of propeller typically? |
| A. | 6ft |
| B. | 8ft |
| C. | 10ft |
| D. | 20ft |
| Answer» B. 8ft | |
| 4. |
To reduce aural signatures of engine exhaust, we can use _____________ |
| A. | insulating material |
| B. | lofting |
| C. | drafting |
| D. | non-insulating material |
| Answer» B. lofting | |
| 5. |
Propeller aircraft experiences internal noise. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
To reduce piston exhaust noise ______________ |
| A. | we can use more mufflers |
| B. | mufflers can be used only |
| C. | reduce lift always |
| D. | increase jet speed always |
| Answer» B. mufflers can be used only | |
| 7. |
Arrange in the correct order of noise produced by engine type. |
| A. | Turbojet > turbofan > reciprocating engine |
| B. | Turbojet < turbofan < reciprocating engine |
| C. | Turbojet > turbofan = reciprocating engine |
| D. | Turbojet > turbofan < reciprocating engine |
| Answer» B. Turbojet < turbofan < reciprocating engine | |
| 8. |
Small diameter and high velocity jet will produce _____________ |
| A. | more noise |
| B. | less noise |
| C. | less aural signature |
| D. | independent of diameter and velocity |
| Answer» B. less noise | |
| 9. |
Primary cause of aircraft noise is ___________ |
| A. | engine exhaust |
| B. | lift |
| C. | fuselage |
| D. | cabin |
| Answer» B. lift | |
| 10. |
Noise produced by an aircraft is called __________ |
| A. | aural signature |
| B. | aurora beam |
| C. | signal beam |
| D. | ir beam |
| Answer» B. aurora beam | |