EDUDELIGHT SECONDARY SCHOOL
1 BENSON AVENUE, LEKKI PHASE 1, LAGOS.
FIRST TERM CAT 2017/2018
SUBJECT:BASIC TECHNOLOGY LASS:JSS3 TIME:40min
OBJECTIVE: Answer all questions
1.The grade of steel is determined by its…..(a)air (b)carbon (c)oxygen (d)iron.
2.The blast furnace is used for manufacturing ……(a)aluminium (b)lead (c)metal sheet (d)pig iron.
3.Which of the following materials is needed in the production of iron?(a)cast iron (b)iron ore (c)pig iron (d)white iron
4.If a 90g piece of timber weighs 60g when completely dried,the dry moisture content is….(a)30 (b)33.5 (c)50 (d)125.
5.The following are artificial wood defects EXCEPT..(a)bow (b)check (c)cup (d)knot.
6.A thin sheet of wood 1mm thick cut from a log is called…(a)batten (b)laminate (c)veneer (d)plywood.
7.The type of chemicals used to protect wood against termites/insects attack and decay are called……………(a)appliances (b)polishes (c)preservatives (d)treatments.
8.The kiln method of drying wood is ……than the air method.(a)better (b)faster (c)inferior (d)slower.
9.The process of reducing the moisture content in wood is known as…..(a)conversion (b)felling (c)seasoning (d)preservation.
10.In woodwork,……………..is the process of splitting logs with saw machine into commercial purposes.(a)balking (b)conversion (c)felling (d)preservation.
SECTION B THEORY
1a.What do you understand by seasoning of timber? List and explain types of seasoning. 5Marks
1b. What is the percentage moisture content of a timber with 90g before and 60g after seasoning. 5mrks.