Basic Science Jss 3 First Term Examination Questions
EXAMINATION
CLASS: SS3B
TIME: 2 HOURS
NAME: Andrew Momah
Instructions:
- Answer all questions in this section.
- Each question is followed by four options lettered A to D. Choose the correct option and shade the answer space on your answer sheet.
- Do all rough work on the question paper.
SECTION A (OBJECTIVE)
- A material that has high resistance to heat would:
A. conduct electricity
B. not conduct heat
C. have energy
D. allow heat to pass through - A fluorescent bulb converts energy to:
A. Heat/light energy
B. Kinetic/electrical energy
C. Electric/light energy
D. Mechanic/potential energy - Trees for timber are commonly found in the:
A. Rainforest zone
B. Free areas
C. Forest reserve
D. All of the above - What type of conversion involves cutting wood across the growth ring?
A. Plain
B. Panelling
C. Rift
D. Quarter - Which of these is referred to as the living layer in a timber?
A. Log
B. Bark
C. Veneer
D. Cambium - All except one is not a function of preservatives on timber:
A. Conduct electricity
B. Not conduct heat
C. Have energy
D. Allow heat to pass through - What type of seasoning is considered better because it can be regulated?
A. Natural seasoning
B. Kiln seasoning
C. Preservation
D. Shaping - What type of maintenance is required when an engine is making a strange noise?
A. Preventive
B. Predictive
C. Corrective
D. General - All except one is not a property of ceramic:
A. Toughness
B. Hardness
C. Brittleness
D. Heat resistance - Which of the following is a non-ferrous metal used for high tension electric wire?
A. Silver
B. Cast iron
C. Copper
D. None of the above
Good luck!
SECTION A (OBJECTIVE)
- A plastic material which cannot be melted and remoulded is known as:
A. Thermoplastic
B. Thermocouple
C. Thermoset
D. Tool plastics
- Which of the following is used to produce bronze alloy?
A. Aluminum
B. Tin
C. Steel
D. Brass
- The core conductors for house wiring are usually made of:
A. Aluminum
B. Brass
C. Copper
D. Iron
- All except one is not an artificial defect:
A. Check
B. Twist
C. Heart shake
D. Warping
- If a wood sample of 120kg weighs 80kg after seasoning, what is the percentage moisture content?
A. 32.5%
B. 30%
C. 40%
D. 50%
- The process of treating rubber with sulphur and other chemicals to become stronger is called:
A. Wood defects
B. Treatment
C. Seasoning
D. Vulcanization
- Which of these is not needed in the first aid box?
A. Iodine
B. Aspirin
C. Stethoscope
D. Dettol
- Which of the following properties does not identify Hardwood?
A. Broad leaves
B. Shed their leaves
C. Complex cellular structure
D. Dicot
- A way of rendering wood immune to defects and insects is:
A. Aesthetic purpose
B. Durability
C. Repel insects
D. None of the above
- _____ is the process of cutting logs into marketable sizes.
A. Preservation
B. Conversion
C. Planing
D. Shrinkage
- A panel saw is mainly used to cut wood:
A. Along the grain
B. Across the grain
C. Along and across the grain
D. None of the above
- The ability of metal to be drawn or stretched is known as:
A. Ductility
B. Soldering
C. Elasticity
D. Density
- The process of removing excess water or moisture from timber is known as:
A. Seasoning
B. Mending
C. Vulcanization
D. Polishing
- _____ wood possesses properties such as shedding its leaves.
A. Cedar
B. Hardwood
C. Redwood
D. Softwood
- _____ is the thin sheet obtained from wood.
A. Chipboard
B. Veneer
C. Plyboard
D. MDF
SECTION A (OBJECTIVE)
- _____ is a heavy metallic platform regarded as the metal workbench:
A. Tong
B. Anvil
C. Fuller
D. Metal Lathe
- Brass is an alloy made from zinc and:
A. Gold
B. Silver
C. Copper
D. Bronze
- Which of the following is used for marking and testing squareness or right angles?
A. Steel square
B. Protractor
C. Sliding bevel
D. Steel rule
- The following are products of plastic except:
A. Buckets
B. Car battery cases
C. China ware
D. Shopping bags
- Which of these is not an iron ore?
A. Hematite
B. Limonite
C. Magnetite
D. Thermocouple
- The sample of drawing shown below is in projection:
A. Orthographic
B. Plane figure
C. Oblique drawing
D. Isometric
- A pictorial drawing where two axes or views of the solid shape are drawn at 30° to the plane is:
A. Orthographic
B. Plane figure
C. Oblique drawing
D. Isometric
- Micrometer screw gauge is used for:
A. Cutting this metal
B. Drilling
C. Measuring thickness
D. Holding small metal
- Solder is an alloy of Tin and:
A. Cast iron
B. Lead
C. Carbon
D. Zinc
- Which of the following products is made from plastic?
A. Balloon
B. Bicycle tube
C. Engine belts
D. Car bumper
- Which of the following is not a method of processing ceramic?
A. Casting
B. Potter’s wheel
C. Coil pot
D. Hand pinch
- Thermal insulation describes the ability of ceramics to withstand:
A. Force
B. Heat
C. Load
D. Tension
- All except one is not a woodworking holding tool:
A. Bench vice
B. F clamp
C. Center punch
D. Sash clamp
- One of these is not an advantage of wood in making engineering tools handles:
A. Durability
B. Lightweight
C. Strength
D. Expensive
SECTION A (OBJECTIVE)
- Cassiterite is an alloy of which of the following elements?
A. Magnesium
B. Tin
C. Aluminum
D. Steel
- Which of the following is not a measuring tool?
A. Vernier caliper
B. Micrometer screw gauge
C. Inside and outside caliper
D. Scriber
- Which of the following is not a positive impact of technology in society?
A. Global Warming
B. Improved transportation system
C. Improved household gadgets
D. Improved information system
- Which of the following is not a career prospect in technology?
A. Optician
B. Civil Engineering
C. Management science
D. Information communication technology
- Aluminum is suitable for manufacturing cooking utensils due to its:
A. Attractiveness
B. High density
C. Low density
D. Heat conductivity
- _____ is a career prospect in engineering that involves inspection, repair, and service of vehicles.
A. Transport
B. Mechanical
C. Aeronautic
D. Automobile
- A pair of compasses is required to perform these tasks, except to:
A. Construct circles
B. Draw arcs
C. Bisect angles/lines
D. Measure angles
- An angle greater than 90° but less than 180° is a/an:
A. Acute angle
B. Complimentary angle
C. Obtuse angle
D. Reflex angle
- Which of these is an acute angle?
A. 30°
B. 45°
C. 60°
D. 90°
- The triangle represented below can have how many lines of symmetry?
A. Four
B. Three
C. Two
D. No line of symmetry
- If the diagram below indicates isometric axes, what is the value of the angle?
A. 75°
B. 30°
C. 110°
D. 120°
- Which of the following is not a method of wood conversion?
A. Plain sawing
B. Crosscut sawing
C. Rift sawing
D. Quarter sawing
Good luck!
SECTION A (OBJECTIVE)
- All except one is not a method of processing steel:
A. Bessemer Converter method
B. Blast furnace method
C. Electric Arc
D. Open hearth furnace
- The hardness of steel is determined by:
A. Quantity of steel
B. Alloying material
C. Carbon content
D. Tempering
- Which of these is not a type of glass?
A. Sheet
B. Annealing
C. Reinforced
D. Fibre
- _____ is a metal that opposes easy flow of electricity.
A. Aluminum
B. Nichrome
C. Brass
D. Steel
- The process of heating and sharp-cooling a metal is known as:
A. Tempering
B. Forming
C. Malleability
D. Coating
- Which of these is not a method of processing plastic?
A. Injection
B. Coating
C. Extrusion
D. Blasting
- Release of toxic chemicals to the atmosphere is a disadvantage of:
A. Moulding
B. Potter’s wheel
C. Smelting
D. Glazing
- Which of the following is not a feature of perspective drawing?
A. Vanishing point
B. Station point
C. Horizon line
D. Sections
- Cast iron is produced in a ______ furnace.
A. Bessemer converter
B. Electric arc
C. Cupola
D. Reverberated
SECTION B
Answer Question One and Any Other Two in this part.
SECTION A
- Draw a title block with the following information:
- (i) Name
- (ii) Class
- (iii) Title
- (iv) Scale
- (v) Date
- Draw the isometric block above in oblique projection to full scale (1:1).
SECTION B
- Mention two types of orthographic projection, draw their symbols.
- Define the following:
- (i) Felling
- (ii) Wood Conversion
- (iii) Wood Seasoning
- Define wood preservative, give two examples.
- State four importance of wood seasoning.
- A sample of wood weighs 100g after seasoning. If it has 40% moisture content, calculate the wet weight.
SECTION C
- (a) Mention/explain five (5) properties of metals.
(b) State two differences between glass and ceramics.
(c) State four uses of ceramics.
(d) What is annealing?
SECTION D
- (a) Explain the difference between ferrous and non-ferrous metals, giving 4 examples of each.
(b) Describe the following terms in metal:
- (i) Smelting
- (ii) Casting
- (iii) Forming
- In processing pig iron, coke serves _______ while limestone serves ________.
- Define alloy.
- Describe four alloys under these headings:
- Alloy Name
- Metals
- Use
Good luck with your exam!