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

Belt Drives: Types of belt drive Ceramics: Types of Ceramics Advantages and Disadvantages of Chain drives Len Academy Questions for Basic Technology JSS3, 2nd Term, 2020 Len Academy Question for Basic Technology, JSS3, 2nd Term, 2020, Part 2 Belt and Pulley Drives: Types of Belt in Belt Drives Electromechanical Energy: Parts of the Refrigerator and how they operate Chain Drive, Types and Classifications 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 Maintenance, Types of Maintenance Hardwood and Softwood - Characteristics and Examples What are Ceramics? Characteristics of Ceramics

Academic Questions in Basic Technology

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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

A chain drive consists of an endless chain running over two _____.

  • A. Hooks

  • B. Spikes

  • C. Spokes

  • D. Sprockets

  • E. Hinges

  • F. Danes

Which is the most economical of all power transmitting drive mechanisms?

  • A. Pulley drive

  • B. Gear drive

  • C. Chain drive

  • D. Belt drive

  • E. Thread drive

  • F. Fabricated drive

Which of the following is false concerning  drive mechanisms in machines?

  • A. Pulley drives do not require a means of power transmission

  • B. Gear drive is a means of power transmission

  • C. Chain drive is a means of power transmission

  • D. Belt drive is a means of power transmission

  • E. The drive mechanisms of machines accomplishes it's function via a rotational motion

  • F. Drive mechanisms results into a mechanical movements of machines via power transmission

Arrow head lines - Len Academy

The lines above are used at the end of dimension lines?

  • A. True

  • B. False

Which of the following is not a type of maintenance?

  • A. Fixated

  • B. Overhaul

  • C. Predictive

  • D. Reinforcement

  • E. Periodic

  • F. Corrective

Which of the following is incorrect concerning preventive maintenance?

  • A. It is considered to be the best form of maintenance

  • B. Immunization is a form of preventive maintenance

  • C. Worn out parts may be discovered when preventive maintenance is carried out

  • D. Preventive maintenance is defined as the repairs carried out on an equipment or object after a correct prediction of an impending fault

  • E. A person who services his car monthly practices preventive maintenance (even though the car functions properly)

  • F. The main goal of preventive maintenance is to stop a device from breaking down suddenly



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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. When 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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Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 10 years of experience, a Versatile Writer, a Web Developer, a Cisco Certified Network Associate and a Cisco CyberOps Associate.

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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

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

Preventive maintenance is carried out routinely on a device even though no apparent fault may be present on such device.

The goal of preventive maintenance as the name suggest is to prevent a sudden breakdown on a device or equipment.

As an instance, a person who services his or her car monthly even though the car is still able to function correctly is said to be carrying out preventive maintenance on the car.

In the course of a preventive maintenance, worn out parts may be discovered and replaced as soon as possible. Also, there may be a change of oil while other little adjustments may also be carried out.

We can even carry out preventive maintenance on our body to prevent certain diseases. For this reason, some persons have discovered cancerous cells in their body through regular medical checkup; and were able to kill such cells before they become malignant.

As a matter of fact; immunization is a form of preventive maintenance.

Please read more on immunization here.

Please read on maintenance and types of maintenance here

Hardwood - Len Academy

Hardwoods are derived from angiosperms. They show the following characteristics:

  1. They usually have a higher density than softwood. Balsa is an exception.

  2. They are usually more expensive than softwood.

  3. They grow at a slower rate than softwood.

  4. Hardwood trees shed their leaves in certain times of the year.

  5. Hardwood are more fire resistant than softwood.

  6. The leaves of hardwood trees are evergreen.

  7. They are used for making quality furniture (in terms of strength). They are also suitable for decking in buildings.

  8. Hardwood trees always have divided trunks which are sometimes referred to as a dendritic form.

  9. In terms of price, hardwood are usually more expensive than softwood.

Examples of hardwood include iroko, ash, beech, alder, teak, birch, mahogany, maple, oak, balsa and walnut.

Please read more on hardwood vs softwood here

Ceramics are refractory. They also require a very high amount of heat and subsquent cooling to be formed.

Being refractory means that they are capable of withstanding a variety of abuses like high temperatures and chemical attacks.

Ceramics are generally made by taking clay from the ground and mixing it with water. It is then shaped into any form and fired inside an oven (called kiln) at a very high temperature. They may then be decorated with a waterproof, paint-like substances called glazes.

Please read more on ceramics here

Ceramics may have constrasting physical and chemical properties (or characteristics); but in general,

  1. They have high melting points.

  2. They are heat resistant.

  3. They can be very hard with great strength; although a few are brittle or soft; for example, graphite.

  4. They are durable (last for a long time).

  5. Most are electrical insulators (cannot conduct electricity) but; graphite is an electrical conductor.

  6. They are chemically unreactive or inert.

  7. They are not easily oxidized.

  8. Most are non-magnetic.