Basic Technology

Len Academy Questions for Basic Technology JSS3, 2nd Term, 2020

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

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, 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.

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

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Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 7 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 actual 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

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 more 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.