SECTION A [40MKS]
- State a safety hazard associated with carrying of material in the workshop when the materials are :[2mks]
- heavy.
- large
- State four problems that you may encounter if you used blunt tools to work in the workshop [2mks].
- State a safety hazard associated with carrying of material in the workshop when the materials are :[2mks]
- List down four job opportunitiesthat are in the woodwork industry for a form four school leaver can pursue [2mks]
- Give three main reasons why heartwood is preferred to sapwood on construction. [3mks]
- Using a neat sketches , describe the correct method of testing a try square for accuracy [3mks]
- Briefly describe the circumstances under which a cutting gauge may be used [2mks]
- State three causes of clogging when planning and describe how each can be rectified[3mks]
- State the uses of the following woodwork tools [2mks]
- The drill
- The bradawl
- A sample of wood of weight 200g weighed 180g after being dried in a kiln for 10hrs . Calculate the moisture content of the sampleof wood after the 10 hrs [6mks]
- Explain briefly any three conditions that affect the rate of tree growth[3mks]
- Give two reasons why quarter sawn timber is of better quality than timber obtained from the plain sewing method.[4mks]
- Name 4 parts of a bow saw and state their function [4mks]
- The figure 1 shown represents the two orthographic views of an object .Sketch the isometric view of the object in good proportion [5mks]
SECTION B [60MKS]
answer question 11 and any other three question from this section . Your are advised to spend not more than 25 min on question 11.
- Fig 2 shows an isometric view of a shaped block .Draw FULL size the three views of the object in1stangle projection [15mks]
- Using sketches describe two methods of cutting veneers from logs [6mks]
- With the aid of labeled sketches outline the procedure of sharpening auger bitspurs and state the necessary precautions [61/2 mks]
- list down the reasons for reconditioning a plane [2 1/2MKS]
- State and briefly explain five reasons for seasoning timber [5mks]
- Give three main reasons why woodworker would prefer using heartwood rather than rapwood when making woodwork projects [3mks]
- Outline the procedure of finishing using French polish [7mks]
- Name any five types of machines used in woodwork besides a circular rip saw [5mks]
- List down five different tasks that can be done using a circular rip saw in woodwork [5mks]
- Name two types of machines used in shaping (decorating) wood and two types used for cut out different types of joints [5mks]
- Name five different widening and four framing joints used in woodwork [4 1/2marks]
- Using sketches of exploded views show five different ways of making widening joints [4 1/2 mks]
- Briefly explain the steps followed in the making of a haunched mortise and tenon joint [6mks]
MARKING SCHEME
SECTION A [40MKS]
- State a safety hazard associated with carrying of material in the workshop when the materials are :[2mks]
heavy
One can fall under the heavy load
large
one can be obscured by the large load when moving - State four problems that you may encounter if you used blunt tools to work in the workshop [2mks].
cannot cut efficiently
can slip and one can get injured
makes one o get tired very fast
makes one use alot of force
- State a safety hazard associated with carrying of material in the workshop when the materials are :[2mks]
- List down four job opportunitiesthat are in the woodwork industry for a form four school leaver can pursue [2mks]
can be self employed
can be employed in a woodworking firm
can be employed in forestry departments
can be employed in construction sites - Give three main reasons why heartwood is preferred to sapwood on construction. [3mks]
rich in colour
shrinkage is even
not easily attacked by insect and fungi - Using a neat sketches , describe the correct method of testing a try square for accuracy [3mks]
using a true edge a line is marked across
reverse the try square and align the line marked on the ariss edge .
if the lines coincide,the try square is accurate - Briefly describe the circumstances under which a cutting gauge may be used [2mks]
cut thin wood
cut small rebates
cut veneers
cutting across the grains
- Using a neat sketches , describe the correct method of testing a try square for accuracy [3mks]
- State three causes of clogging when planning and describe how each can be rectified[3mks]
-planning against the grains
-when the mouth is too small
- when the edge of the cap iron is not in close contact with the blade - State the uses of the following woodwork tools [2mks]
The drill
-making round holes
The bredawl
-making small holes to start screws and nails
- State three causes of clogging when planning and describe how each can be rectified[3mks]
- A sample of wood of weight 200g weighed 180g after being dried in a kiln for 10hrs . Calculate the moisture content of the sampleof wood after the 10 hrs [6mks]
- 200g – 180g ˣ 100%
180g
20 ˣ 100%
180
= 11.1% - Explain briefly any three conditions that affect the rate of tree growth[3mks]
- type of tree
- climatic conditions
- type of soils - Give two reasons why quarter sawn timber is of better quality than timber obtained from the plain sawing method.[4mks]
-is stable
- is rich in colour - Name 4 parts of a bow saw and state their function [4mks]8. Give two reasons why quarter sawn timber is of better quality than timber obtained from the plain sewing method.[4mks]7. Explain briefly any three conditions that affect the rate of tree growth[3mks]
key – turns and tensions the cord
cord – tensions the blade
cross bar – supports the arm
blade – for cutting - The figure 1 shown represents the two orthographic views of an object .Sketch the isometric view of the object in good proportion [5mks]
fig 1
SECTION B [60MKS]
answer question 11 and any other three question from this section . Your are advised to spend not more than 25 min on question 11.
- Fig 2 shows an isometric view of a shaped block .draw FULL size the three views of the object in 1stangle projection [15mks]
- Using sketches describe two methods of cutting veneers from logs [6mks]
-Rotary cutting
- log in mounted between centres of a large lathe.
-it is reduced to a true cylinder and then rotated against a razor sharp knife ,producing a comtinuous veneer.
- slice cutting
-log in sawn to a machine bed
- the machine moves the bulk diagonally across a knife which shaves off a veneer
- the process is continued - With the aid of labeled sketches outline the procedure of sharpening auger bitspurs and state the necessary precautions [61/2 mks]
-Auger bit file or a triangle file is used .Triangular should not have teeeth at the corners.
-Auger bit is held firmly against the edge of the bench with the screw pointing up.
- the inside of the spurs is then filled until it forms a knife- like edge.
- The filling is done across the complete inside face of the spur rather than just on the leading edge.
- The bit is repositioned and the opposite spur filled in the same manner. - list down the reasons for reconditioning a plane [2 1/2MKS]
- when the cutting edge is nicked
- when the cutting edge is rounded
- when the edge is not square
- when the bevel is too short
- Using sketches describe two methods of cutting veneers from logs [6mks]
- State and briefly explain five reasons for seasoning timber [5mks]
- to reduce weight
- to prevent it from insect and fungi attacks
- to make it accept finishes
- to make it workable
- to make it stable - Give three main reasons why woodworker would prefer using heartwood rather than sapwood when making woodwork projects [3mks]
- it's decorative
- not easily attacked by insects
-it is stable - Outline the procedure of finishing using French polish [7mks]
-Rubber is changed and and glinded on the surface with light presssure to start with.
- Rubber is used along the grain while the pressure is increased gradually.
- Rubber is recharged and then used with circular movements.
-Final strokes are taken along the grain.
-Surface is left to dry for 24hrs
- State and briefly explain five reasons for seasoning timber [5mks]
- Name any five types of machines used in woodwork besides a circular rip saw [5m
-woodturninglathe -thicknesser - tenonner
-bandsaw -surface planneR - List down five different tasks that can be done using a circular rip saw in woodwork [5mks]
-ripping -rebating -mitring
-grooving -crosscuting - Name two types of machines used in shaping (decorating) wood and two types used for cut out different types of joints [5mks]
-woodturning lathe -band saw
-spindle moulder
-tenonner
- Name any five types of machines used in woodwork besides a circular rip saw [5m
- Name five different widening and four framing joints used in woodwork [4 1/2marks]
-butt joint - mortice& tenon
-splined edge joint - mitred joint
- rebated edge joint - brindle joint
- t &g joint -gross halvin joints
- dowelled edge joint - Using sketches of exploded views show five different ways of making widening joints [41/2mks]
- Briefly explain the steps followed in the making of a haunched mortise and tenon joint [6mks]
-prepare the mortice & tenon piece.
-divide the tenon and mortice pieces into three equal parts on the thickness side .
- mark the waste material.
- mark the hawned on the tenon piece.
-cut the shoulder and remove the waste material from the tenon piece.
- chop out the waste material on the mortise piece.
- Name five different widening and four framing joints used in woodwork [4 1/2marks]
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