Basic Technology

Len Academy questions for Basic Technology JSS2, 2nd Term, Part 2

len Alfred Ajibola - Thu, 06th June, 2019 @ 07:32: AM

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, JSS2, 2nd Term Continued:

Please read Questions 1 - 30 here.

31. Vices are _______ tools.

  1. Boring

  2. Percussion

  3. Holding

  4. Marking out


32. Which of the following is NOT true regarding combination pliers?

  1. They can be used for cutting

  2. They are used for holding flat metals

  3. They are used for holding round objects

  4. They can be used to tighten screw


33. Switches are made from _______

  1. Thermoset

  2. Thermoplastics

  3. Natural rubber

  4. Synthetic rubber


34. Which of the following is not an electro-mechanical energy appliance?

  1. Soldering iron

  2. Refrigerator

  3. Fruit blender

  4. Electric fan


35. A charcoal pressing iron is a/an _______ energy based appliance.

  1. Electrical

  2. Mechanical

  3. Chemical

  4. Electro-mechanical


36. Which of the following is NOT a part of an electric motor?

  1. Frame

  2. Rotor

  3. Gear box

  4. Shaft


37. A motor operates on the principle of _______ induction.

  1. Chemomagnetic

  2. Electromagnetic

  3. Mechanomagnetic

  4. Photomagnetic


38. An element used in transmission lines is _______.

  1. Sodium

  2. Aluminium

  3. Calcium

  4. Potassium


39. The control equipment for supplying electricity to a building is composed of the followings EXCEPT _______.

  1. Energy meter

  2. Busbar

  3. Sealing box

  4. Distribution board


40. The following can be used for cutting metal to size except _______.

  1. Chisel

  2. Flame saw

  3. Power saw

  4. Hack saw


41. The form of energy involved in pulling and pushing is _______.

  1. Mechanical

  2. Force

  3. Chemical

  4. Nuclear


42. _______ take out nails in woodwork.

  1. Pliers

  2. Pincers

  3. Chisel

  4. Punch


43. A _______ converts electrical to sound energy.

  1. Microphone

  2. Loudspeaker

  3. Antenna

  4. Radio receiver


44. Electric power is measured with a/an _______.

  1. Wattmeter

  2. Voltmeter

  3. Ohmmeter

  4. Galvanometer

  5. Please read on Derived Unit for a clue to the correct Answer.


45. A fuel will NOT include _______.

  1. Hydrogen gas

  2. Sawdust

  3. Methane

  4. Charcoal

You can read on some Interesting Facts for Students here.

46. Thermionic emission is also known as _______ emission.

  1. Secondary

  2. Primary

  3. Cold cathode

  4. Photoelectric


47. Which of the following will NOT be present in a complete circuit?

  1. Tester

  2. Switch

  3. Conductor

  4. Bulb


48. The following professions are related to Basic Technology except _______.

  1. Accountancy

  2. Wood worker

  3. Civil engineering

  4. Surveying


49. The type of current flowing in our homes to operate home appliances is known as _______.

  1. Direct

  2. Alternative

  3. Alternating

  4. Indirect


50. A/An _______ converts electrical energy to mechanical energy.

  1. Transformer

  2. Inverter

  3. Generator

  4. Motor


51. Which of these should be avoided in the workshop?

  1. Handling hot metal with a tong

  2. Chisel with mushroom head

  3. Use of googles when welding

  4. Helmet during construction work


52. Which of the following processes will NOT produce holes in metals?

  1. Welding

  2. Drilling

  3. Boring

  4. Punching


53. The amplifier used in an analog system is called a _______.

  1. Repeater

  2. Channel

  3. Circuit

  4. Carrier


54. If a force of 30N travels through a distance of 10m, what is the work done?

  1. 3 watts

  2. 3 joules

  3. 300 watts

  4. 300 joules


55. 6cm is equivalent to _______ kilometers.

  1. 600000

  2. 6000

  3. 600

  4. 0.006


56. Calculate the potential energy of a 60kg man standing on a wall 30m tall from the ground. (g = 10ms-2).

  1. 180J

  2. 1800J

  3. 18KJ

  4. 18000KJ


57. A car travels with a speed of 60ms-1 for 25s. What is the distance covered by the car?

  1. 2.4m

  2. 85m

  3. 35m

  4. 1500m


58. Which of the following is FALSE regarding a trapezium?

  1. It has only two parallel sides

  2. The diagonal intersects each other to give equal and opposite angles

  3. The length of its parallel sides are equal

  4. Two diagonals divides it into four triangles


59. Current flows through a path called _______.

  1. Electric route

  2. Electric circuit

  3. Conductor channel

  4. Conductor pipes


60. An ICT equipment machine will NOT include _______.

  1. Calculator

  2. Mobile phone

  3. Electric fan

  4. Fax

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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