KCSE Past Papers 2017 Woodwork Paper 1

2 marks

(b) Disadvantages of spirit stains

2. (a) Hand saws

- Tennon saws, dovetail saws, backsaw, rip saw, cross-cut saw, panel saw. Any 3

(b) Curve cutting saw

3. (a) (i) Heart rot

Decay caused by fungi near the heart of the living tree, it includes the pith and some of the true wood.

(ii) Knots

Occurs when a branch or a limb is cut through during the growth of the tree.

(b) Types of glue used for veneering;

- Animal glue - Synthetic resin

Casein glue - Contact or/impact adhesive

Safety when using power drill:

Then turn the square over. Any inaccuracy will show as a divergence of the line and the blade.

6.

It is advisable to always stagger the nails and angle to avoid nails hitting one another.

7. The cap iron is fitted close to the cutting edge and the cutting iron is fitted with the beveled edge against the stock.

This correct positioning of the cutting iron allows the shaving to immediately bend and break resulting in clean cuts.

The cap iron is fitted on the beveled side of the cutting iron.

The shavings elongate and rip out of the surface of the board as opposed to being bent and broken resulting in rough cuts.

( a) Factors that may cause closure of a business:

b Patterns of matching veneers.

(b) Using a piece of scrap stock to bore directly through the work.

A method of laying veneers when a veneer hammer is used to press the veneers into close contact with the core and squeeze out excess glue and air bubbles.

(ii) Caul and press veneering

The veneers are pressed into close contact with the glued core by means of cauls with bearers and cramps or mechanical press.

(b) Procedure of shooting end grain

Mark the required true end.

Firmly squeeze the stock against the chosen tail with one hand about 1mm projecting over the bed.

(c) (i) Twist

13. (a) (i) names or bits

x — Expansive bit

y — Forstner bit

(ii) Expansive bit

Used for boring holes of varying diameters in softwood.(1)

Forstner bit

Drills an accurate flat bottomed hole I.

(a). procedure of sharpening the cutting tilade or a jack plane using an oilstone

Procedure of marking and cutting

1 — Measure and mark the length of tennon using a pencil and try square.

2 — Divide the width of the piece into 3 equal parts and draw the lines to the length mark.

3 — Mark one face of the tennon using a try square.

4 — Turn to the other face and mark the mitre with the bevel square.

5 — Cut the face marked square and remove the waste.

6 — Cut the mitre and remove the waste.

(i) ruolic Sector:

These are government owned organizations which provide services to the public.

Examples: - Government ministries

(ii) Private Sector

These are organizations that are privately owned and not part of government.

Examples: - Private corporations

- Partnerships

- Sole business e.t.c

(b) (i) Name of device

Cutting gauge,cutting board/mitre template

(ii) Name of parts

A — Stock

B — Adjustable stopper

(iii) Used when cutting many pieces of equal length.

(iV) Safety precautions to observe:

(i) Ensure that the device is held firmly on the working bench.

(ii) Ensure that cutting is along the slot.

(iii) Hold the stock firmly to avoid vibration.

(c) Safety precaution to be observed while using a surface planes.

Ensure no loose parts before you switch on the machine.

Remove all loose knots from the stock before surfacing.

15. (a)

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