Aircraft Design - Design Process Overview Quiz(MCQ)

1 .

What is the initial phase of an Aircraft Design?

A)

Sizing

B)

Conceptual Design

C)

Detail Design

D)

Preliminary Design

Correct Answer : Conceptual Design

Explanation : Initial Phase of an Aircraft begins with the Conceptual Design. Preliminary design deals with the modelling. Detailed design is responsible for actual layout.

2 .

The whole Design philosophy of an Aircraft is termed as _____

A)

sizing

B)

anatomy

C)

design wheel

D)

design evaluation

Correct Answer : design wheel

Explanation : The whole Design philosophy of an Aircraft is called Design Wheel. The design processes as per the design wheel are then divided into different phases of Aircraft design such as sizing.

3 .

The requirements of an Aircraft will fall in ______ phase.

A)

conceptual design

B)

detail design

C)

preliminary design

D)

surface requirement

Correct Answer : conceptual design

Explanation : The requirements of an Aircraft is very basic question in whole process. Such basic questions are part of the conceptual design phase. Sizing and detail data will be put at later stages.

4 .

Which of the design phase is shown in below diagram?
Aircraft Design

A)

Detail Design

B)

First order sizing

C)

Preliminary Design

D)

Conceptual Design

Correct Answer : Detail Design

Explaination : Conceptual Design stage begins with requirements. Preliminary deals with lofting and testing. Detail Design deals with the actual manufacturing process in which the location and size of rivets will be finalized as per requirements.

5 .

What is meant by the term Lofting?

A)

Conceptual Drawing

B)

Trade study specifications

C)

Specifications and Requirements

D)

Mathematical modelling of the skin

Correct Answer : Mathematical modelling of the skin

Explanation : Lofting is defined as the mathematical modelling the outer layer of airframe i.e., skin of Aircraft. Lofting is nothing but defining the shape of the fuselage and overall aircraft. It is one of the main objectives of the Preliminary Design.

6 .

The main objective of the Preliminary stage is ______

A)

lofting

B)

fabrication

C)

manufacture

D)

first order sizing

Correct Answer : lofting

Explanation : Lofting is one of the main objectives of the preliminary design. Manufacturing and Fabrication are part of the Detail Design. First order sizing is done during the conceptual stage.

7 .

Which of these is not part of the Conceptual Design phase?

A)

Conceptual Drawing

B)

Lofting

C)

First weight estimation

D)

Specifications and Requirements

Correct Answer : Lofting

Explanation : The Conceptual Design is the first phase of Design. In this phase we are concerned about-What are the requirements? What should be the Weight? Will my design fly? First-order Sizing etc.

8 .

Which are the phases of Aircraft Design process?

A)

Only Preliminary Phase

B)

Only Detail Design Phase

C)

Conceptual Design only

D)

Conceptual Design, Preliminary Design and Detail Design

Correct Answer : Conceptual Design only

Explanation : Aircraft design process can be broken into three major phases. These phases are Conceptual Design, Preliminary Design and Detail Design. Each phase deals with distinct subjects.

9 .

Which of the following is a correct pair?

A)

Testing major parts for fabrication – Initial Design

B)

Testing major parts for fabrication – Conceptual Design

C)

Testing major parts for fabrication – Detail Design

D)

Testing major parts for fabrication – Preliminary Design

Correct Answer : Testing major parts for fabrication – Detail Design

Explaination : The Detail design is the final stage of any Aircraft. Here, we consider the actual processes for designing from fabrication to manufacturing. Conceptual and preliminary are the intermediate stages of an Aircraft design.

10 .

Which of the following is the correct pair in chronological order?

A)

Detail Design-Preliminary Design-Conceptual Design

B)

Conceptual Design-Detail Design-Preliminary Design

C)

Preliminary Design-Detail Design-Conceptual Design

D)

Conceptual Design-Preliminary Design-Detail Design

Correct Answer : Conceptual Design-Preliminary Design-Detail Design

Explanation : The Overall design process of an Aircraft goes through 3 distinct phases in sequence. Any Aircraft is designed based on specific criteria which are called as requirements of Aircraft. Hence, the correct pair in chronological order is Conceptual Design-Preliminary Design-Detail Design.

11 .

How Conceptual Design begins?

A)

With Lofting

B)

With CFD tests

C)

With Fabrication

D)

With predefined requirements or new concept

Correct Answer : With predefined requirements or new concept

Explanation : Conceptual Design is the first and foremost phase of Aircraft Design. Here, the rough design is being prepared based on certain requirements. In some cases it also initiated through new idea or concepts.

12 .

Which of these cannot be considered as design requirement of prop engine?

A)

Turbine Temperature

B)

Range

C)

Endurance

D)

Take-off and landing

Correct Answer : Turbine Temperature

Explanation : A typical Prop engine is reciprocating engine. Prop engine relies on the power produced through propeller. Range, take-off and landing, endurance etc. are affected by the power generated by the Prop engine. If asked for Turbo-prop then, we can include turbine as well.

13 .

The drawing which represents the rough idea of the actual design is called as ______

A)

conceptual digit

B)

conceptual sketch

C)

conceptual elevation

D)

conceptual parameter

Correct Answer : conceptual sketch

Explanation : Based on the general requirements, design engineer makes rough calculations of different parameters during the stage of conceptual design. Based on the initial estimation of weight and performance, engineers will draw a rough sketch having all the required details. Such rough drawing is called conceptual sketch.

14 .

Why do we use optimization after initial layout?

A)

To lower efficiency

B)

To reduce effectivity

C)

To provide lowest cost structure

D)

To improve highest cost structure

Correct Answer : To provide lowest cost structure

Explanation : Optimization techniques are used to provide the lightest and most cost effective structure. In other words, it is used to check whether my design is best for given requirements, for given cost constraints.

15 .

If design is carried out in CAD software then what should be the scale of design?

A)

Half Scale

B)

Full Scale

C)

Quarter Scale

D)

Tenth Scale

Correct Answer : Full Scale

Explanation : If designer is using computer aided design software then, they are required to design the full scale model. If engineer is using pen-paper then, the appropriate scale is required to draw the drawing for example, 1/15th scale.

16 .

The estimation of weight, fuel weight etc. is done by ____ process.

A)

lofting

B)

drafting

C)

drawing

D)

sizing

Correct Answer : sizing

Explanation : Sizing is the process to calculate some performance parameters of aircraft. Lofting is modelling of skin. Drafting and drawing are linked together.

17 .

What is the function of 'irst order sizing'?

A)

To provide data for initial layout

B)

To crate lofting

C)

To test model in Fluent

D)

To provide manufacturing

Correct Answer : To provide data for initial layout

Explanation : During the conceptual stage we make a rough sketch called a conceptual sketch. With the help of it we can provide initial estimation of some parameters such as aerodynamics, weight etc. This initial estimation will provide data for the initial layout. Thus, it is called as first order sizing.

18 .

The three view drawing which shows arrangements of parts during conceptual design is called as _____

A)

lofting

B)

analyzing

C)

planning

D)

first order sizing

Correct Answer : planning

Explanation : First order sizing is nothing but a three vie drawing base on initial estimated data. The three vie drawing can highlight vital information such as undercarriage location etc.