1) The stages of mission profile of a commercial aircraft are _______
a. Take-off → climb → cruise → descent → landing
b. Take-off → descent → climb → cruise → landing
c. Take-off → cruise → climb → descent → landing d. Take-off → climb → descent → cruise → landing
Answer
Explanation
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ANSWER: Take-off → climb → cruise → descent → landing
Explanation: The stages of mission profile of a commercial aircraft are Take-off → climb → cruise → descent → landing. An aircraft firstly take-off from ground at the initial airport. At an altitude of 50 foot it starts climbing to higher altitudes, next it starts to cruise to some designated distance and later it starts descending to lower altitude. Finally at an altitude of 50 foot above the ground the aircraft starts landing in the destination airport.
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2) What is meant by performance estimation?
a. Prediction of capabilities of the aircraft
b. Provide validated performance data for performance section
c. Verification of aircraft achievements d. Certification of performance
Answer
Explanation
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ANSWER: Prediction of capabilities of the aircraft
Explanation: Performance estimation involves the prediction of the capabilities of the aircraft from the consideration of its aerodynamic design, powerplant and operating environment. It is applied to design, modification and supplement.
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3) Which of the following is not applied to performance estimation?
a. Design
b. Modification
c. Supplement d. Validation of performance data
Answer
Explanation
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ANSWER: Validation of performance data
Explanation: Performance estimation is applied in fields of design of a new type of aircraft, modification of an existing aircraft type in respect to design changes affecting its aerodynamic characteristics and to supplement or extend the full-scale measured performance of an aircraft type for conditions outside those already established.
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4) ISA stands for_________
a. International Standard Atmosphere
b. International Standard Altitude
c. International Standard Airlines d. International Standard Aircraft
Answer
Explanation
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ANSWER: International Standard Atmosphere
Explanation: ISA stands for International Standard Atmosphere International Standard Atmosphere (ISA) is a linearized model of the temperature atmosphere. It represents the mean global atmosphere state with respect to seasonal changes and latitude and is used as the basis for aircraft design.
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5) The performance estimation process begins with the proposal of some performance target.
a. True
b. False
c. _ d. _
Answer
Explanation
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ANSWER: True
Explanation: The performance estimation process begins with the proposal of some performance target. Such as the requirement to carry a specified payload over a given route that forms the mission profile, possibly within time and cost limits.
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6) The elimination process will include an assumption of the environmental conditions of the atmosphere in which the aircraft will operate.
a. True
b. False
c. _ d. _
Answer
Explanation
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ANSWER: True
Explanation: The elimination process will include an assumption of the environmental conditions of the atmosphere in which the aircraft will operate. Since the atmosphere is a very variable medium in that its pressure and temperature vary with height and also with geographical location and time. Performance estimation is based on assumption of International Standard Atmosphere (ISA).
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7) International Standard Atmosphere (ISA) is a ____________
a. Linearized Model of the Temperature Atmosphere
b. Horizontal Model of the Temperature Atmosphere
c. Linearized Model of the Pressure Atmosphere d. Horizontal Model of the Pressure Atmosphere
Answer
Explanation
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ANSWER: Linearized Model of the Temperature Atmosphere
Explanation: International Standard Atmosphere (ISA) is a linearized model of the temperature atmosphere. It represents the mean global atmosphere state with respect to seasonal changes and latitude and is used as the basis for aircraft design.
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8) The performance estimation process is _________
a. optional
b. iterative
c. not required d. single attempt
Answer
Explanation
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ANSWER: iterative
Explanation: The performance estimation process is iterative. When the estimations show that the performance targets can be met, the aircraft can proceed to manufacture or modification and next is performance measurement and if the estimation fails then this process repeats.
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9) Alternative models of ISA are design atmospheres.
a. True
b. False
c. _ d. _
Answer
Explanation
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ANSWER: True
Explanation: Alternative models of ISA are design atmospheres. These represent the aircraft performance at hotter or colder climates depending on tropical or arctic regions which help in performance estimation.
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10) _________ is the important factor to be satisfied during performance estimation.
a. Temperature
b. Pressure
c. Airworthiness requirement d. Climate
Answer
Explanation
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ANSWER: Airworthiness requirement
Explanation: Airworthiness requirement is the important factor to be satisfied during performance estimation. Airworthiness is the measure of an aircraft’s suitability for safe flight. Certification of airworthiness is conferred by a certificate of airworthiness from the state of aircraft registry national aviation authority, and is maintained by performing the required maintenance actions.
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