BECE 2012 Basic Design And Technology (Pre Technical Skills ) Past Question Paper Two

1

(a) Ama ate fried fish, kenkey and fresh pepper sauce

Copy and complete in a table what Ama ate into the functional groups of food.

Food item

Functional group

(i)     Fried fish

(ii)    Kenkey

(iii)   Fresh pepper sauce

(b) The diagram below is the drawing of a mango

(i) Enlarge the diagram

Bece-2012-BDT-Pre-Technical-Skills-Question-1b-image

(ii) Shade your drawing in
(b) (i) in three tones

(iii) List two other methods of shading apart from the one used in (b) (ii)

(c) (i) State two reasons why investigations are carried out in the design process.

(ii) List three electrical appliances used in the home

1. (a) Ama ate fried fish, kenkey and fresh pepper sauce

Copy and complete in a table what Ama ate into the functional groups of food.

Food itemFunctional group
(i)     Fried fishBody building food
(ii)    KenkeyEnergy giving food
(iii)   Fresh pepper sauceProtective food

(b)i The diagram below is the drawing of a mango

(ii) Shade your drawing in (b) (i) in three tones

 
Bece-2012-BDT-Pre-Technical-Skills-Question-1bii-image

(iii) List two other methods of shading apart from the one used in (b) (ii)

Hatching (shading with lines)
Cross hatching (shading with crossed lines)
Stippling (shading with dots)
Smudging (shading by smearing with finger)

(c) (i) State two reasons why investigations are carried out in the design process.
? To properly identify and specify the problem
? To decide on best solutions to the problem
? To decide on the most suitable materials and tools needed to solve the problem
? To decide on the right form/shape and size of the article

(ii) List three electrical appliances used in the home
? Pressing iron
? Radio set
? Television set
? Electric cooker
? Refrigerator
? Electric kettle
? Blender
? Microwave oven

2

The figure shows the pictorial view of a wooden block made from odum

 
Bece-2012-BDT-Pre-Technical-Skills-Question-2a-image

(a) (i) Draw full size the front elevation in the direction of arrow P

(ii) List two finishes that can be applied on the wooden block

(b) State one use each of the following in soft soldering:

(i) flux;
(ii) soldering bit

(c) Make a freehand sketch of a pair of snips

(d) The table below shows tools, their uses and ways of caring for them.

Copy and complete the table

Food item

Functional group

(i)     Fried fish

(ii)    Kenkey

(iii)   Fresh pepper sauce

 The figure shows the pictorial view of a wooden block made from odum

(i) Draw full size the front elevation in the direction of arrow P

Bece-2012-BDT-Pre-Technical-Skills-Question-2a-answer-image

(ii) List two finishes that can be applied on the wooden block
• Varnish
• Wax
• Lacquer
• Oil paint

(b) State one use each of the following in soft soldering:

(i) flux;
• It prevents oxidation (the formation of fresh oxides) by forming a protective layer on the solder.
• It cleans the surface of the base metal during heating.
• It eliminates impurities appearing on metal surface.
• It breakdowns the surface tension of molten solder which helps the easy flow.

(ii) soldering bit
• It gives the necessary heat to melt the solder

(c) Make a freehand sketch of a pair of snips

 
Bece-2012-BDT-Pre-Technical-Skills-Question-2c-answer-image

(d) The table below shows tools, their uses and ways of caring for them.

Copy and complete the table

Tool

One use each

One way of caring for the tool

(i)   Builders square

·    Used to check if the corners of walls, etc, are accurate right angles (90°)

·       Clean and keep it dry

·       Use it for the right job

·       Keep in a tool box

(ii)  Hand file

·    Used to file shoulders of metal

·    Used to file corners of metal

·       Clean after use

·       Use it for the right job

·       Keep the teeth sharp

·       Keep it in a tool box

·       Oil the metal part

(iii) Rip saw

·    Used for cutting a piece of wood into two

·       Sharpening

·       Shaping

·       Setting

·       Topping / Jointing

·       Oiling the blade

·       Cleaning

·       Racking the saw

(iv) Gauge rod

·    Used to check if the course height is accurate

·       Clean and keep it dry

·       Use it for the right job

·       Keep in a tool box

3

(a) Explain each of the following terms as used in concrete :
(i) fine aggregates
(ii) coarse aggregates

(b) List three methods of pictorial drawing

(c) (i) Make a freehand sketch of a pick-axe
(ii) Label any two parts on the tool sketched in (c)(i) above

(d) List two items made of cast iron.

(e) Draw the symbol for each of the following electronic components
(i) resistor
(ii) capacitor
(iii) a switch

(f) The figure below shows a pictorial view of a coal-pot made from a metal plate

 
Bece-2012-BDT-Pre-Technical-Skills-Question-3f-image

Arrange the following steps in a sequential order for making the coal-pot.

(i) File pieces to the required sizes;
(ii) Mark-out the parts of the coal-pot
(iii) Assemble the parts;
(iv) Measure the metal pieces to the required dimensions;
(v) Cut out pieces.

(a) Explain each of the following terms as used in concrete :
(i) fine aggregates

Sand which has been washed and sieved to remove particles greater than 5mm in diameter and is to be used for mortar.
OR
Sieved sand, of diameter less than 5 mm, to be used for mixing mortar.

(ii) coarse aggregates
The mixture of sand, stones, gravel and other particles whose diameters are greater then 5 mm and used for mixing mortar

(b) List three methods of pictorial drawing
? Oblique drawing
? Isometric drawing
? Perspective drawing

(c) (i) Make a freehand sketch of a pick-axe

Bece-2012-BDT-Pre-Technical-Skills-Question-3c-answer-image

(ii) Label any two parts on the tool sketched in (c)(i) above

• Shaft / handle
• Head
• Pick
• Chisel / adze

(d) List two items made of cast iron.

(e) Draw the symbol for each of the following electronic components


Bece-2012-BDT-Pre-Technical-Skills-Question-3e-answer-image

Arrange the following steps in a sequential order for making the coal-pot.
(i) File pieces to the required sizes;
(ii) Mark-out the parts of the coal-pot
(iii) Assemble the parts;
(iv) Measure the metal pieces to the required dimensions;
(v) Cut out pieces.

(i) Measure the metal pieces to the required dimensions;
(ii) Mark-out the parts of the coal-pot
(iii) Cut out pieces
(iv) File pieces to the required sizes;
(v) Assemble the parts;

4

 (a) (i) State the difference between plumbing and leveling in walling (ii) List two tools used for plumbing and leveling in walling

(b) List two examples each of a conductor and an insulator

(c) State one purpose each for the following (i) curing a brick; (ii) applying a piece of chalk on the face of a file.

(d) (i) Make a freehand sketch of the soldering iron used in sheet metal work. (ii) Label any two parts on the tool sketched in (d) (i)

(e) The table below shows two materials to be glued together

Copy and complete the table

Prepared Materials

Types of adhesive

(i) Odum to odum

 

(ii) Formica to wawa

 

(iii) Veneer to odum

 

 (a) (i) State the difference between plumbing and levelling in walling
Plumbing refers to checking the vertical uprightness of the wall, whilst
Levelling refers to checking the horizontal levelness of the wall.

(ii) List two tools used for plumbing and leveling in walling
Plimb line and Spirit level / bubble level

(b) List two examples each of a conductor and an insulator

CONDUCTORINSULATOR

Copper

Gold

Silver

Aluminium

Molybdenum

Zinc

Nickel

etc

wood

clay

plastics

fabric

paper

rubber

glass

etc

(c) State one purpose each for the following
(i) curing a brick;
to make it stronger
to reduce cracking
to reduce shrinking
to make it bond better

(ii) applying a piece of chalk on the face of a file.
to prevent metal chips from clogging the teeth of the file
to prevent pinning
to make its teeth easier to clean

(d) (i) Make a freehand sketch of the soldering iron used in sheet metal work.

 Bece-2012-BDT-Pre-Technical-Skills-Question-4d-answer-image

(ii) Label any two parts on the tool sketched in (d) (i)
• Handle
• Heating element
• Soldering Tip / copper tip

(e) The table below shows two materials to be glued together

Copy and complete the table

Prepared Materials

Types of adhesive

(i) Odum to odum

White glue / Polyvinyl acetate (PVA)

(ii) Formica to wawa

Contact adhesive / impact adhesive

(iii) Veneer to odum

Contact adhesive / impact adhesive

End Of Paper

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