Topics in Basic TechnologyDefinitions 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
The _____ functions to remove excess heat from the refrigerator.
D. Expansion Valve
F. Defrost System
A fluid or gas that runs through the compartments of a refrigerator is termed _____.
A. Water vapor
B. Liquid vapor
E. Compressed water
F. Evaporated water
Current flows through a path called _____.
B. Electric Route
E. High Tension
F. Electric Circuit
Googles are safety wears.
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 _____.
B. Hatching lines
C. Long breaks
D. Diagonal line used to state plane surfaces
E. Leader lines
F. Back section lines
With regards to chain drives, the diagram above is a/an _____ chain.
A type of chain drive commonly used in bicycles is the _____ chain.
31. Vices are _______ tools.
32. Which of the following is NOT true regarding combination pliers?
33. Switches are made from _______
34. Which of the following is not an electro-mechanical energy appliance?
35. A charcoal pressing iron is a/an _______ energy based appliance.
36. Which of the following is NOT a part of an electric motor?
37. A motor operates on the principle of _______ induction.
38. An element used in transmission lines is _______.
39. The control equipment for supplying electricity to a building is composed of the followings EXCEPT _______.
40. The following can be used for cutting metal to size except _______.
41. The form of energy involved in pulling and pushing is _______.
42. _______ take out nails in woodwork.
43. A _______ converts electrical to sound energy.
44. Electric power is measured with a/an _______.
45. A fuel will NOT include _______.
46. Thermionic emission is also known as _______ emission.
47. Which of the following will NOT be present in a complete circuit?
48. The following professions are related to Basic Technology except _______.
49. The type of current flowing in our homes to operate home appliances is known as _______.
50. A/An _______ converts electrical energy to mechanical energy.
51. Which of these should be avoided in the workshop?
52. Which of the following processes will NOT produce holes in metals?
53. The amplifier used in an analog system is called a _______.
54. If a force of 30N travels through a distance of 10m, what is the work done?
55. 6cm is equivalent to _______ kilometers.
56. Calculate the potential energy of a 60kg man standing on a wall 30m tall from the ground. (g = 10ms-2).
57. A car travels with a speed of 60ms-1 for 25s. What is the distance covered by the car?
58. Which of the following is FALSE regarding a trapezium?
59. Current flows through a path called _______.
60. An ICT equipment machine will NOT include _______.
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Amazing facts in Basic Technology
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 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.
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:
Short center lines
Diagonal lines used to state plane surfaces
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:
To prevent a breakdown
To repair the breakdown
Below are the types of maintenance:
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.
The diagram below shows the various types of line in technical drawing, their description and general application: