Basic Technology

Len Academy Basic Technology Questions, JSS3

len Alfred Ajibola - Fri, 06th March, 2020 @ 14:50

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 Continued:

Please read on Questions 1-30 here.

31. The _____ protect electrical equipment from excessive current.

  1. Fuse
  2. Plug
  3. Switch
  4. Transformer


32. A device that converts electrical energy into heat energy will NOT include an electric _____.

  1. Stove
  2. Grinder
  3. Kettle
  4. Soldering Iron


33. A semi-conductor device is the _____.

  1. Capacitor
  2. Resistor
  3. Transistor
  4. Diode


34. The _____ stores electric charges.

  1. Diode
  2. Transistor
  3. Resistor
  4. Capacitor


35. Current flows through a path called _____.

  1. Electric Route
  2. Electric Circuit
  3. Conductor Channel
  4. Capacitor Pipes


36. A drawing which shows the plan, front and end elevation is _____.

  1. Perspective
  2. Pictorial
  3. Isometric
  4. Orthographic


37. The most popular floor finish used in a workshop is the _____.

  1. Carpet
  2. Rug
  3. Marble
  4. Concrete


38. The purpose of wood finishes is to _____.

  1. Prevent the wood from absorbing water
  2. Prevent the wood from wrapping
  3. Make the wood last longer
  4. Soften the wood


39. The main function of foundation in a building is to _____.

  1. Distribute the weight of the building to the soil
  2. Bond the wall
  3. Carry the weight of the wall
  4. Protect the building from erosion


40. If the scale chosen for a technical drawing assignment is 10mm to 2m; the scale 25m will be represented by _____.

  1. 50mm
  2. 55mm
  3. 100mm
  4. 125mm


41. Soldering bit is made of copper because copper _____.

  1. Does not rust
  2. Lasts longer
  3. Is a cheap material
  4. Is a good conductor of heat


42. The following devices uses the principles of rotary and linear motions EXCEPT _____.

  1. G-clamp
  2. Screw jack
  3. Screw
  4. Pliers


43. Wood preservative is added to planks so as to prevent _____.

  1. Decaying
  2. Drying
  3. Bending
  4. Cracking


44. A maintenance process carried out to prevent a machine from getting damaged is known as _____.

  1. Inspective
  2. Preventive
  3. Protective
  4. Productive
  5. Please read on Maintenance for correct Answer.


45. An electronic device that stores electrons is the _____.

  1. Capacitor
  2. Transistor
  3. Transformer
  4. Rectifier

You can check out what every student ought to know here.

46. Which of the Followings CANNOT be used to construct lintels in buildings?

  1. Concrete
  2. Clay
  3. Steel
  4. Timber


47. The easiest table top to clean and maintain is _____ top.

  1. Painted
  2. Polished
  3. Varnished
  4. Formica


48. A professional who determines the cost of materials, labour and workmanship that could be charged for a proposed building is known as _____.

  1. Architect
  2. Quantity Surveyor
  3. Structural Engineer
  4. Builder


49. A roofing material will NOT include _____.

  1. Asbestos
  2. Plain Tiles
  3. Plastics
  4. Corrugated Iron Sheets


50. The angle of inclination in an Isometric drawing is _____.

  1. 90o
  2. 60o
  3. 45o
  4. 30o


51. Which of the following is NOT a woodwork joint?

  1. Hinge
  2. Dovetail
  3. Butt
  4. Halving


52. Buffing in metal work means _____.

  1. Vanishing metal surfaces
  2. Painting metal surfaces
  3. Smoothing metal surfaces
  4. Polishing metal surfaces


53. The most effective chemical in making water transparent is _____.

  1. Limestone
  2. Calcium
  3. Chlorine
  4. Alum


54. Energy possessed by a moving object is said to be _____.

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


55. The most suitable kind of door for the entrance of a garage is the _____ door.

  1. Sliding
  2. Flush
  3. Roller Shutter
  4. Panel


56. One major function of lintel in a wall is to _____.

  1. Hold the blocks together
  2. Support the structure above the opening in the wall
  3. Join two column
  4. Beautify the wall


57. The use of compressed air to make machines work is termed _____

  1. Hydraulics
  2. Pneumatics
  3. Airlics
  4. Airflow


58. The tool used for cutting external screw thread is the _____.

  1. Die
  2. Tap
  3. Panel Saw
  4. Hack Saw


59. An example of a driving tool is the _____.

  1. Hack Saw
  2. Chisel
  3. Screw
  4. Screwdriver


60. Which of the following is NOT an example of a nail?

  1. Bowel
  2. Pin
  3. Oval
  4. Round

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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