EGD Level 3 (Example of Exam paper Sept. 2012)

QUESTION 1: ISOMETRIC

FIGURE 1 shows two views of a tool holder drawn in third-angle orthographic projection. Do not draw the given views.

1.1

Construct a suitable isometric scale.

(3)

1.2

Below the isometric scale, draw an isometric projection of the holder.

(10)

No hidden detail is required.

                                                              

FIGURE 1

[13]

QUESTION 2: ASSEMBLY DRAWING

FIGURE 2 (next page) shows the primary views of the components of a Footstep bearing.

The complete list of parts is as follows: Item 1……………..base…………………………..1 off………………………cast iron Item 2……………..body…………………………..1 off……………………...cast iron Item 3……………..bush…………………………..1 off……………………...bronze Item 4……………..shaft…………………………..1 off……………………...brass Item 5 …………….M16 hexagonal head bolt…..1 off……………………..mild steel

2.1	Draw as an assembly drawing, according to scale 1:2, a full sectional front view of the assembly.		(20)
2.2	Insert any five dimensions on the assembly drawing.		(5)

2.3

Insert the item numbers on the assembly view.

(3)

2.4

Insert a suitable title and scale centrally below the drawing.

(2) [30]

Figure 2

QUESTION 3: DETAILED DRAWING

FIGURE 3 shows three views of the assembly of a drive head.

Draw, according to scale 1:1 and in FIRST-ANGLE ORTHOGRAPHIC PROJECTION, detailed drawings of the following parts: (Show all hidden detail)

3.1

The pipe clamp  (item 1) showing the following views:

3.1.1 3.1.2

A full sectional front view with the left half in section A Left view

(10)   (10) [20]

Figure 3

QUESTION 4: INTERPENETRATION

FIGURE 4 shows, in first-angle orthographic projection, an incomplete front view and left view of  a  round pipe interpenetration.

4.1 4.2 4.3

Draw the TWO given views to scale 1:1 Complete the front view by plotting the curve of interpenetration. Show all the projection lines.

(2) (8) (2)

  

FIGURE 4

[12]

QUESTION 5: DEVELOPMENT

FIGURE 5 below shows a square based sheet metal pyramid

5.1

Make us of a scale of 1:1 and develop the square based sheet metal pyramid by using the radial line development method.

                        

[10]

Level 4 ERD sample exam paper (2011)

QUESTION 1

1.1

By using the “Pollution prevention hierarchy” in the correct order, name and explain the FOUR steps by which pollution should be prevented.

(8)

1.2

You are a Mechanical Design Engineer, and you have been approached by a prospective investor to design a tricycle (a bicycle with three wheels).   By using the steps of the design process indicated below, explain fully what actions you will take during each step.

1.2.1

Design specifications

(1)

1.2.2

Research

(1)

1.2.3

Initial design ideas

(1)

1.2.4

Development/Schematic preparation.

(1)

1.2.5

Analyze and select final solution.

(1)

1.2.6

Build a prototype.

(1)

1.2.7

Test and evaluate

(1)

1.2.8

Present results.

(1)

1.4

What does “CAD” stand for?

(1)

1.5	Write down TWO things that the Arithmetic Logic Unit (ALU) of a computer can perform.		(2)

QUESTION 2

2.1

List any FOUR input devices related to computers and discuss ONE function of each.

(8)

2.2

Discuss TWO advantages and TWO disadvantages of building prototype models of a specific design.

(4)

2.3

Supply a short definition of flexi-time and discuss whether it will work for all jobs. Give a reason for your answer.

(4)

2.4

What does ‘ECSA’ stand for?

(2)

2.5

When writing a technical report on research done, the report writer will have headings in the report such as ‘Conclusions’ and ‘recommendations’.   What are the differences between Conclusions and Recommendations?

(4)

  

QUESTION 3

3.3

Various models are used in the design process.   Discuss the mathematical model as used in the design process.

(4)

3.4	An artisan works in a very noisy workshop.   He is busy on the bench grinder, grinding a piece of steel for a specific purpose.   Apart from safety shoes, which personal protective equipment is he required to wear during this activity?		(3)

 QUESTION 4

4.1

Explain the difference between “biodegradable waste” and “non-biodegradable waste:, and supply an example of a biodegradable waste.

(3)

4.2

Professional bodies such as ECSA represent, amongst others, its own interest.   Name TWO other responsibilities/roles of these professional bodies.

(2)

4.3

Discuss TWO negative effects that construction vehicles may have on society as a whole.

(2)

4.5

Various models are used in the design process.   Discuss the role of the physical model as used in the design process.

(3)