by Sunday | Oct 5 | NABTEB QUESTIONS
(i) Knots: Occur when a branch or limb is cut through during the process of conversion, knots reduce the strength of the timber owing to the short or gross grain which surrounds them. Types of knots include line or sound knot, loose or dead knot and spray knot. (ii)...
by Sunday | Oct 5 | NABTEB QUESTIONS
Natural method of air season: This is the method whereby the timber is stacked in the open air, where it is dried by the prevailing weather conditions, the temperature, the humidity of the air, and the speed of air circulation govern the rate of drying. The stack is...
by Sunday | Oct 5 | NABTEB QUESTIONS
The Advantages of seasoning timber include:- i. Further shrinkage, checking and distortion are reduced to minimum ii. Conditions are less favourable for decay, mould, strain and some insect attack. iii. The timber is higher in weight, more economical to transport, and...
by Sunday | Oct 5 | NABTEB QUESTIONS
Seasoning is the drying out of most of the moisture from the wood, so that the timber is conditioned before use.
by Sunday | Oct 4 | NABTEB QUESTIONS
(i) Carcass: This is a body or the „bare bones of a boxlike construction. Any wide boards joined together to make such articles as boxes, cupboards, sideboards etc for a carcass. In other words, it is the skeleton of a job before it is covered up with plywood or other...
by Sunday | Oct 4 | NABTEB QUESTIONS
Five parts of a lathe machine are as follow: (i) Drive pulley (ii) Chuck or screw chuck (iii) Tail stock (iv) Tool rest holder (v) Auger
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