Basic Technology

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

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

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

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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:

1. Which of the following is an under-developed technology?

  1. Tractor

  2. Excavator

  3. Spade

  4. Harvester

 

2. A saw used in metal work is the _______ saw.

  1. Fret

  2. Panel

  3. Hack

  4. Dovetail

 

3. A device used for intercepting signals from radio stations is called _______.

  1. Loudspeaker

  2. Amplifier

  3. Transmitter

  4. Antenna

 

4. 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

 

5. The following devices will convert electrical energy to mechanical energy except _______.

  1. Bread toaster

  2. Pepper grinder

  3. Fruit blender

  4. Electric fan

 

6. A body at rest possesses _______ energy.

  1. Kinetic

  2. Potential

  3. Mechanical

  4. Chemical

 

7. _______ is used for setting sheet on a drawing board.

  1. Sets square

  2. Scale rule

  3. Compass

  4. Tee square

 

8. The main function of a thermostat in an electric fan is to _______.

  1. Control the temperature

  2. Decrease the fan speed

  3. Increase the fan speed

  4. Convert electrical energy to heat energy

 

9. Chemical combination of copper and zinc will form _______.

  1. Brass

  2. Bronze

  3. Duralumin

  4. Steel

 

10. _______ is used for making small holes in wood before using screws.

  1. Brace

  2. Bits

  3. Bradawl

  4. Gimlet

 

11. A type of hammer used to extract nail is the _______.

  1. Mallet

  2. Ball peen

  3. Claw

  4. Blocking head

 

12. An example of a driving tool is the _______.

  1. Hack saw

  2. Chisel

  3. Screw

  4. Screw driver

 

13. The tool used for cutting external screw thread is the _______.

  1. Tap

  2. Pliers

  3. Panel saw

  4. Hack saw

 

14. An electronic device that store electrons is the _______.

  1. Capacitor

  2. Transistor

  3. Transformer

  4. Rectifier

 

15. A maintenance process carried out on damaged engine is known as _______.

  1. Inspective

  2. Preventive

  3. Protective

  4. Corrective

    5. Please read on Maintenance for correct Answer.

You can attempt Len Academy questions on various subjects here.

16. Soldering bit is made of copper because copper _______.

  1. Does not rust

  2. Lasts longer

  3. Is a cheap material

  4. Is a good conduct of heat

 

17. Which of the followings will function in order to lower or raise voltages in a circuit?

  1. Transformers

  2. Busbar

  3. Circuit breaker

  4. Fuse

 

18. Chemical energy in fuel is converted to heat energy through a process called _______.

  1. Condensation

  2. Heating

  3. Boiling<

  4. Burning

 

19. An example of multipurpose saw is the _______ saw.

  1. Coping

  2. Dovetail

  3. Panel

  4. Tenon

 

20. The right tool for smoothening sheet metal is the _______.

  1. Chisel

  2. File

  3. Snips

  4. Pliers

 

21. A drawing with scale 1:5 is said to be _______.

  1. Outlined

  2. Reduced

  3. Enlarged

  4. Sectioned

 

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

  1. Section

  2. Tangent

  3. Diameter

  4. Quadrant

 

23. _______ steel is used to produce various cutting tools.

  1. Stainless

  2. High carbon

  3. Low carbon

  4. Mild

 

24. The heating element in an electric kettle is _______.

  1. Copper

  2. Nichrome

  3. Silicon

  4. Germanium

 

25. Which of the following tools will NOT take precision measurement?

  1. Vee block

  2. Vernier caliper

  3. Micrometer

  4. Depth gauge

 

26. A metal work hand tool used for testing the flatness of surfaces will be a _______ tool.

  1. Measuring

  2. Holding

  3. Marking out

  4. Percussion

 

27. A chisel used for cutting keyways and slots is the _______ chisel.

  1. Round nose

  2. Diamond point

  3. Cross cut

  4. Flat

 

28. A scraper used for removing high spots on curved surfaces is the _______ scraper.

  1. Round

  2. Triangular

  3. Circular

  4. Half round

 

29. A punch is made from _______ type of steel.

  1. Mild

  2. High carbon

  3. Medium carbon

  4. Low carbon

 

30. A hammer with plastic, wooden and rubber head is the _______.

  1. Blocking head

  2. Ball pein

  3. Mallet

  4. Cross pein

Please read the remaining questions here.

You can read on our various basic technology topics here.

You can read on Len Academy basic technology questions for JSS3, 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