MECHANICAL AND PRODUCTING ENGINEERING DEPARTMENTMECH 3133 Engineering Design

ANSWER ALL QUESTIONS Test (1.5 Hours)

Question 1(a) Use a model of your choice to illustrate the process of engineering

design.[10 marks]

(b) Explain the salient features that are obtained from the QFD matrix and discuss their importance in the drafting of the product design specifications. You may use an example to illustrate.

[10 marks](c) Engineering design projects usually involve working in teams.

Develop a rating for assessing the effectiveness of team meetings. [5 marks]

Question 2A structural steel part is being designed as part of an assembly of components. The following concepts have been proposed by the design team;

A. Built up from steel plates and welded togetherB. Built up from steel plates and riveted together andC. Cast steel part

In the process of evaluating the concepts, the design team compiled the information shown in the table below.

Design Criteria

Weight Units AlternativeA B C

Material Cost 0.18 $/kg 60 60 50Manufacturing Cost

0.30 $ 2500 2200 3000

Reparability 0.12 Experience Good Excellent FairDurability 0.24 Experience High High GoodReliability 0.12 Experience Excellent Excellent FairTime to Produce

0.04 Hours 20 25 60

(i) Explain how the weights are obtained[3 marks]

(ii) Which alternative is the best? Explain your reasoning.[10 marks]

(a)Explain the following terminology as used in engineering design Patent a design Design for reliability Designer ethics Hazards free

[12 marks]