Basic Technology

Len Academy Questions for Basic Technology JSS3, 2nd Term

len Alfred Ajibola - Fri, 06th March, 2020 @ 14:52

Topics in Basic Technology

Definitions of technology and their explanations Examples of technology Forms of technology explained with their differences Types of chain drive Types of belt drive Types of Ceramics Advantages and Disadvantages of Chain Drives Len Academy Questions for Basic Technology JSS3, 2nd Term Len Academy Basic Technology Questions, JSS3 Belt and Pulley Drives: Types of belt in belt drives Refrigerator as an electromechanical device, its parts and operations What is chain drive? Classification of chain drive What are Belt Drives? Advantages and Disadvantages of Belt Drives Type of Lines in Technical Drawings Len Academy questions for Basic Technology, JSS2, 2nd Term Len Academy questions for Basic Technology JSS2, 2nd Term, Part 2 What is Maintenance? Types of Maintenance Hardwood and Softwood - Characteristics and Examples What are Ceramics? Characteristics of Ceramics

Academic Questions in Basic Technology

Please click here to see all Questions and Answers

The _____ functions to remove excess heat from the refrigerator.

  • A. Evaporator

  • B. Compressor

  • C. Condenser

  • D. Expansion Valve

  • E. Thermostat

  • F. Defrost System

A fluid or gas that runs through the compartments of a refrigerator is termed _____.

  • A. Water vapor

  • B. Liquid vapor

  • C. Frost

  • D. Refrigerant

  • E. Compressed water

  • F. Evaporated water

Current flows through a path called _____.

  • A. Electricity

  • B. Electric Route

  • C. Electrolysis

  • D. Transformer

  • E. High Tension

  • F. Electric Circuit

Googles are safety wears.

  • A. True

  • B. False

Which of the following is false concerning advanced ceramics?

  • A. They can be made from metallic oxides

  • B. They are very hard and durable

  • C. They are corrosion resistant

  • D. They are fired in the presence of oxygen

  • E. They are fired at a very high temperature of about 1700oC

  • F. They can be made from non-oxides such as carbides and borides

A thin continuous line is used for representing the followings except _____.

  • A. Intersections

  • B. Hatching lines

  • C. Long breaks

  • D. Diagonal line used to state plane surfaces

  • E. Leader lines

  • F. Back section lines

Inverted toothed chain drive - Len Academy

With regards to chain drives, the diagram above is a/an _____ chain.

  • A. Roller

  • B. Silent

  • C. Leaf

  • D. Flat-top

  • E. Detachable

  • F. Acceleration

A type of chain drive commonly used in bicycles is the _____ chain.

  • A. Roller

  • B. Silent

  • C. Leaf

  • D. Flat-top

  • E. Detachable

  • F. Acceleration

Basic Technology Questions, JSS3, 2nd Term:

1. A bench vice functions as a _____ tool.

  1. Boring
  2. Hammering
  3. Holding
  4. Cutting


2. Safety wears will NOT include _____.

  1. Apron
  2. Wrist watch
  3. Googles
  4. Cover shoes


3. A tool used for drawing circles and arcs on a sheet of metal is the _____.

  1. Scriber
  2. Spring Divider
  3. Claw Hammer
  4. Cross Cut Chisel


4. Technology through _____ has made the world a global village.

  1. Power
  2. Electricity
  3. Internet
  4. Agriculture
  5. Please read on this Article as a clue to Answer.


5. Driving tools will NOT include _____.

  1. Punch
  2. Screw
  3. Mallet
  4. Hammer


6. _____ steel is used in the production of Hack saw blades.

  1. Stainless
  2. High Carbon
  3. Low Carbon
  4. Mild


7. A power saw moves in _____ motion.

  1. Circular
  2. Linear
  3. Random
  4. Translational


8. Which of the following is NOT a part of a circle?

  1. Chord
  2. Segment
  3. Section
  4. Sector


9. The line passing through the center and touches the circumference of a circle is known as _____.

  1. Section
  2. Tangent
  3. Diameter
  4. Quadrant


10. A polygon with 10 sides is called _____.

  1. Decagon
  2. Nonagon
  3. Heptagon
  4. Hexagon


11. A French tool is used to draw _____ lines.

  1. Diagonal
  2. Oblique
  3. Straight
  4. Curved


12. A scalene triangle has _____.

  1. Unequal sides
  2. Parallel sides
  3. All angles equal
  4. All sides equal


13. An angle greater the 90o but less than 180o is called _____ angle.

  1. Complementary
  2. Supplementary
  3. Obtuse
  4. Reflex
  5. Please read on Angles for correct Answer.


14. A thick continuous line is used for _____.

  1. Outline
  2. Projection
  3. Center Line
  4. Cutting Plane
  5. Please read on Types of Line in Technical Drawing for correct Answer.


15. A drawing with a scale 1:2 is said to be _____.

  1. Outlined
  2. Reduced
  3. Enlarged
  4. Sectioned

You can attempt Len Academy Questions on various Subjects (with Answers) here.

16. An information NOT obtained in the title block of a drawing is the _____.

  1. Age
  2. Name
  3. Date
  4. Scale


17. The right tool for smoothening sheet metal is the _____.

  1. Chisel
  2. File
  3. Snips
  4. Pliers


18. _____ saw is used for cutting curves in wood.

  1. Dovetail
  2. Tenon
  3. Compass
  4. Cross-cut


19. A permanent joint can be made via _____.

  1. Bolt and Nut
  2. Soldering
  3. Welding
  4. Screw


20. Metal finishing does NOT include _____.

  1. Brushing
  2. Painting
  3. Plating
  4. Waxing


21. An example of a multipurpose saw is the _____ saw.

  1. Coping
  2. Dovetail
  3. Panel
  4. Tenon


22. A jack as a simple machine is a/an _____ multiplier.

  1. Power
  2. Force
  3. Efficiency
  4. Energy


23. A body at rest possess _____ energy.

  1. Kinetic
  2. Potential
  3. Mechanical
  4. Chemical


24. Which of the following is NOT required in transmission and distribution of power at low frequency?

  1. Amplifier
  2. Substation
  3. Control Panel
  4. Circuit Breaker


25. The following devices will convert electrical energy to mechanical energy EXCEPT _____.

  1. Bread Toaster
  2. Pepper Grinder
  3. Fruit Blender
  4. Electric Fan


26. _____ is the rate at which work is done.

  1. Energy
  2. Force
  3. Power
  4. Voltage


27. Which of the following is a gaseous fuel?

  1. Butane
  2. Bitumen
  3. Methane
  4. Carbon(IV)oxide


28. The chemical energy in fuel is converted to heat energy through a process called _____.

  1. Condensation
  2. Heating
  3. Boiling
  4. Burning


29. The most widely used AC supply system in Nigerian houses is the _____.

  1. Single Phase 2-wire
  2. Single Phase 3-wire
  3. Two Phase 3-wire
  4. Two Phase 4-wire


30. Which of the following functions to lower or raise the voltage in a circuit?

  1. Transformers
  2. Busbar
  3. Circuit Breaker
  4. Fuse

Please read the remaining Questions here.

You can read on our various Basic Technology Topics here.

You can Read on Basic Technology Questions for JSS2, 2nd Term here.

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Amazing facts in Basic Technology

Rubber bands - Len Academy

Rubber bands last longer when refrigerated

Lighter was invented before matches

Johann Wolfgang Dobereiner was credited with the invention of lighter in 1826 while the match was made 3 years later

Volkswagen group of companies own some of the top cars of the world. These are Audi, Bentley, Bugatti, Ducati, Lamborghini and Porsche

Notable points in Basic Technology

Arrowhead Lines - Len Academy

Arrowhead lines are lines with pointed edges at one or both ends. The pointed edges are in the form of an arrow.

Arrowhead lines are used:

  • At the end of dimensional lines.

  • As measurement lines.

Please read more on types of line here.

A thin continuous line could be a straight or curved line. However, the main point to remember is this: 'it is a tiny line with no dot or dashes within it'.


A thin continuous line is used for representing the followings:

  • Projection lines

  • Hatching lines

  • Construction lines

  • Short center lines

  • Measurement lines

  • Diagonal lines used to state plane surfaces

  • Intersections

  • Leader lines

  • Backside section lines

Any action that involves the servicing, checking, replacing and repairing of an equipment, object or device is termed maintenance.

Maintenance has two main goals. These are:

  1. To prevent a breakdown

  2. To repair the breakdown


Below are the types of maintenance:

  • Preventive maintenance

  • Corrective maintenance

  • Predictive maintenance

  • Periodic maintenance

  • Reinforcement

  • Overhaul

Please read more on maintenance here.


Softwoods are often derived from coniferous trees, that is: trees with needle-like leaves, and whose seeds are covered in cones.

Below are some characteristics of softwood:

  • Most softwood have lower densities than hardwood (weighs lower).

  • In terms of price, they are often less expensive than hardwood.

  • Their growth rate is faster than hardwood.

  • Most softwood do not shed their needle-like leaves during the year. However, the softwood 'larch' and 'cypress' are exceptions.

  • They are less fire resistant.

Please read on hardwood and softwood here

The diagram below shows the various types of line in technical drawing, their description and general application:

Type of Lines - Len Academy

Please read more on the types of line in technical drawing here