Basic Technology First Term Examination Questions 2019/2020 Session – Junior Secondary School Three (JSS 3)
EDUDELIGHT SECONDARY SCHOOL
1 BENSON AVENUE, LEKKI PHASE 1, LAGOS.
1ST TERM EXAMINATION 2017/2018
SUBJECT:BASIC TECHNOLOGY CLASS:JSS3 TIME:2hrs
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.
11.Which of the following is not an artificial wood defects?(a)bow (b)cup (c)ring shake (d)insect attack.
12.There are ………….methods of cutting veneers.(a)4 (b)2 (c)3 (d)5
13.Which of the following is not a method of processing plastics?(a)compression moulding (b)extraction method (c)injection moulding (d)vacuum forming.
14.Natural rubber is made from a milky liquid called…..(a)latex (b)rubble (c)sap (d)solution.
15.The spark plug in motorcar engines is a…….product.(a)ceramics (b)metallic (c)non-metallic (d)rubber.
16.In pottery,clay is mixed with water and pounded to remove……(a)air bubbles (b)excess heat (c)sand content (d)water log.
17………… are used to indicate that certain surfaces of metal parts are to be machined or machine allowance has to be provided.(a)ring lines (b)extension lines (c)elevation lines (d)finish marks.
18……………..is a type of drawing that shows three dimensions or sides of objects simultaneously on a single drawing.(a)isometric drawing (b)life drawing (c)multiview drawing (d)orthographic sketches.
19.The three intersecting lines of the isometric axes meet at a point called the…..(a)varnishing point (b)origin (c)right angle (d)angle of projection.
20.The purpose of wood finishes is to……..(a)prevent wood from warping (b)soften the wood (c)prevent the wood from absorbing water (d)make the wood last longer.
21.What is the amount of current that will flow in a circuit of 6v power and resistors of 4ohms and 2ohms connected in parallel.(a)8amps (b)4.5amps (c)3amps (d)2amps.
22.Wood preservatives are applied on planks so as to prevent them from…..(a)bending (b)cracking (c)drying (d)decaying.
23.An electronic device used in storing electron is a….(a)capacitor (b)resistor (c)diode (d)transistor.
24.A/An……………………drawing shows the front, plane and end elevations.(a)Axonometric (b)isometric (c)oblique (d)orthographic
25.Hard wood is gotten from …………..tree.(a)deciduous trees (b)coniferous trees (c)simple conifers (d)iroko tree.
26.An unexpected event that can cause injury or harm in the workshop is………….(a)accident (b)safety (c)injury (d)harm.
27.The type of plastic that cannot be remoulded after heating is………….(a)thermoplastic (b)thermoset (c)natural (d)artificial.
28.The simple treatment given to somebody before a doctor comes or before taking to the hospital is……………(a)treatment (b)first aid (c)attention (d)injection.
29.Those who ride bicycles and tricycles are called……..(a)pedestrians (b)cyclist (c)motorist (d)drivers.
30.A room where technology is practiced or studied is called…….(a)workshop (b)workroom (c)site (d)construction site.
31.The metal used in making battery plates is called…………..(a)zinc (b)copper (c)lead (d)tin.
32.Which of the engineering material is used for making gloves and sandals?(a)rubber (b)plastic (c)ceramics (d)wood.
33.All are ceramic products EXCEPT..(a)concrete (b)glass (c)bricks (d)plastics.
34.The commonest form of dimensioning is………..(a)dimension of circles (b)chain dimensioning (c)dimensioning small sizes (d)location dimensioning.
35.The part of building that bond the entire building to the soil is …..(a)foundation (b)floor (c)tile (d)earth.
36.One example of renewable energy source is…………….(a)sun (b)coal (c)petrol (d)natural gas.
37.All are related building career opportunities EXCEPT.(a)bricklayer (b)painter (c)roofer (d)luthier.
38.The process of cutting down a matured tree is …(a)seasoning (b)conversion (c)painting (d)preservatives.
39.All are preservatives EXCEPT…(a)creosote (b)zinc type (c)coalter (d)wax.
40.The supporting of the walls of foundation trenches with materials to prevent them from collapsing is known as…(a)benching (b)ceiling (c)timbering (d)scaffolding.
SECTION B (THEORY )
Answer question one and any other three
1.Show the figure below in isometric projection
2.Describe briefly two of the following processes used in the manufacturing of plastics?
a.compression moulding b.extrusion moulding c.film blowing d.injection moulding.
3a.What do you understand by seasoning of timber?List and explain types of seasoning.
3b. What is the percentage moisture content of a timber with 90g before and 60g after seasoning.
4.i.Name two types of rubber and explain them.
ii. How is natural rubber obtained?
iii.Give one difference between natural and synthetic rubber.
