BECE 2013 Basic Design And Technology (Pre Technical Skills ) Past Question Paper Two

1

(a) State two functions of protein in the body

(b) List two ways by which patching can be done

(c) (i) Explain a design brief
(ii) List three methods of carrying out design investigations.
(iii) State two factors to consider when selecting the best solution from the generated possible solutions in designing.

(d) (i) What is the colour spectrum?
(ii) List the three primary colours
(iii) Explain secondary colours

(a) State two functions of protein in the body
It promotes growth and development.
It repairs worn out tissues in the body.
It provides energy in the absence of carbohydrates
It supports production of hormones and enzymes

(b) List two ways by which patching can be done
By hand
By machine

(c) (i) Explain a design brief
A short statement that expresses the solution to a problem
Or
A statement of what the designer intends to design and make

(ii) List three methods of carrying out design investigations.
By observing carefully
By visiting
By experimenting
By reading relevant literature
By interviewing
By surfing the internet

(iii) State two factors to consider when selecting the best solution from the generated possible solutions in designing.
Its function / effectiveness
Its physical appearance (Aesthetics)
Its cost of designing and making
Its safety and suitability
Its durability

(d) (i) What is the colour spectrum?
The distribution of colours produced when white light is dispersed by a prism

(ii) List the three primary colours?
The primary colours for
(α) pigment: red, yellow and blue
(β) light (additive): red, green and blue
(γ) light (subtractive): magenta, cyan and yellow

(iii) Explain secondary colours
A colour resulting from the mixing of two primary colours in equal proportions

For pigment, the secondary colours are
Violet = (red + blue),
green = (yello + blue) and
orange = (red + yellow)

For light (additive), the secondary colours are
Yellow = (green + red)
Cyan = (green + blue)
Magenta = (red + blue)

For light (subtractive), the secondary colours are:
Red = (yellow + magenta)
Green = (yellow + cyan)
Blue = (magenta + cyan)

2

 Figure 1 shows two views of a solid to be produced with sheet metal

 
Bece-2013-BDT-Home-Economics-Question-2-image

(a) Draw full size the following:
(i) front view
(ii) plan
(iii) surface development

(b) State the name of the solid in figure 1

(c) (i) make a freehand pictorial sketch of a marking gauge
(ii) Label any two parts of the tool you have sketched in (c)(i) above

Figure 1 shows two views of a solid to be produced with sheet metal

(a) Draw full size the following:
(i) front view
(ii) plan
(iii) surface development

Bece-2013-BDT-Home-Economics-Question-2-answer-image

(b) State the name of the solid in figure 1
Square pyramid

(c) (i) make a freehand pictorial sketch of a marking gauge

 
Bece-2013-BDT-Home-Economics-Question-2b-answer-image

(ii) Label any two parts of the tool you have sketched in (c)(i) above
 Thumbscrew
 Stem
 Spur / marking pin
 Stock

3

 Using symbols, draw an electrical circuit diagram to show the following
(i) two bulbs in parallel
(ii) a switch
(iii) a cell

(b) State one function of a light emitting diode (LED) in an electrical circuit.

(c) (i) Make a freehand sketch of a dot punch.

(ii) Indicate the point angle on the tool you sketched in (c)(i) above

(d) Copy and complete the table below

ITEM

ONE SUITABLE MATERIAL FOR MAKING IT

Traditional oven

Kitchen stool

Bristle of tooth brush

Garden rake

(e) State one reason each for carrying out the following processes
(i) leveling a wall
(ii) applying flux when soldering

(a) Using symbols, draw an electrical circuit diagram to show the following
(i) two bulbs in parallel
(ii) a switch
(iii) a cell

Bece-2013-BDT-Home-Economics-Question-3-answer-image

(b) State one function of a light emitting diode (LED) in an electrical circuit.
 Used to indicate the presence of electric current in the electrical circuit.
 It allows electric current to flow through in only one direction.

(c) (i) Make a freehand sketch of a dot punch.

 
Bece-2013-BDT-Home-Economics-Question-3c-answer-image

(ii) Indicate the point angle on the tool you sketched in (c)(i) above
60°

(d) Copy and complete the table below

ITEM

ONE SUITABLE MATERIAL FOR MAKING IT

Traditional oven

 Clay

Kitchen stool

Odum, wawa

Bristle of tooth brush

Nylon

Garden rake

Iron, cast iron, steel

(e) State one reason each for carrying out the following processes
(i) leveling a wall
To ensure that the wall is perfectly horizontal
OR
To check the horizontal straightness of the wall.

(ii) applying flux when soldering
• To prevent oxidation (the formation of fresh oxides) by forming a protective layer on the solder.
• To clean the surface of the base metal during heating.
• To eliminate impurities appearing on metal surface.
• To breakdown the surface tension of molten solder which helps the easy flow.

4

(a) Explain the following
(i) ratio 1:4 for mortar mixture;
(ii) non-ferrous alloys

(b) (i) Make a freehand pictorial sketch of a flat screwdriver
(ii) Label two parts of the tool you sketched in (b)(i) above
(iii) State one main use of the tool you sketched in (b)(i) above.

(c) (i) Add three more courses to the wall in Figure 2
(ii) Show a toothing end on the wall
(iii) List two tools for laying the wall
(iii) State one reason for intruding a half-bat in the wall.

 (a) Explain the following
(i) ratio 1:4 for mortar mixture;
One part of cement to be mixed with four parts of sand.

(ii) non-ferrous alloys
Non ferrous alloys are alloys that do not contain iron
OR
Non ferrous alloys are uniform mixtures of metals that do not contain iron

(b) (i) Make a freehand pictorial sketch of a flat screwdriver

Bece-2013-BDT-Home-Economics-Question-4b-answer-image

(ii) Label two parts of the tool you sketched in (b)(i) above
• Handle
• Shaft
• Blade
• Tip

(iii) State one main use of the tool you sketched in (b)(i) above.
It is used to drive in / tighten and drive out / loosen screws into/out of work peices

(c) (i) Add three more courses to the wall in Figure 2
(ii) Show a toothing end on the wall

Bece-2013-BDT-Home-Economics-Question-4c-answer-image

(iii) List two tools for laying the wall
 hand trowel
 spirit level
 float
 gauge rod
 straight edge
 mortar board
 line and pins
 brick hammer / comb hammer
 bolster and club hammer
 builder’s square

(iii) State one reason for intruding a half-bat in the wall.
To avoid continuous vertical joints

End Of Paper

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