Basic Technology

Types of chain drive

len Alfred Ajibola - 13th July, 2022 @ 01:24 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

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

Types of chain drive

A chain drive is defined as a system comprising an endless chain running over two sprockets, bringing about mechanical movements in the process.

Please read an introduction to chain drives here.

Below are explanations of the various types of chain drive:

  • Roller Chains

The roller chains are very common since they are used in bicycles, motorcycles and vehicle engines.

They are made up of a series of small cylindrical rollers attached together at both sides of its entire length.

Roller Chains - Len Academy

The roller chain requires the sprockets in order to transmit mechanical power. Meanwhile, recall that the sprockets refer to toothed wheels over which an endless rotational chain is fitted. Please see the image of the roller chain in the above diagram.

Roller chains can be single-stranded or multiple-stranded.

  1. The single-stranded roller chain is very common and its power rating capacity can cover a variety of drive load requirements.
  2. Multiple-roller chain provides and increased power capacity without any need for an increase in the chain's rotational speed.

Please read on belt and pulley drives here.


  • Silent Chains

Also called the inverted tooth chains, the silent chains are series of toothed link plates that are attached to one another in a pin-like manner. This manner of attachment allows for free flexing of the chains.

Silent Chains - Len Academy

Silent chains operate with reduced noise levels and can move more loads at higher speed than a roller chain of the same width.

Functionally, silent chains are preferably used in industrial equipment where quietness, silence and smoothness are required.

Meanwhile, always understand that it is quite difficult to connect together the silent chains from different manufacturers.

Please read on the advantages and disadvantages of chain drives here.


  • Leaf Chains

They are preferable used for lifting processes rather than power transmission. They don’t need meshing with sprocket sockets because they are made to run over sheaves.

Leaf Chains - Len Academy

Leaf chains are commonly utilized in trucks that lift large and heavy loads.

Please read on the types of drive here.


  • Flat-Top Chains

The flat-top chains are manufactured for the purpose of conveying materials. For this reason, they are widely used in conveyors.

They consist of plates made up of steel with hinge-like barrels curled on each side with pins inserted into the barrels to create joints acting as both beams and bearings.

Flat-Top Chains - Len Academy

The connecting pins in a flat-top chain are usually enlarged or knurled at one end, giving rise to its continuous length.

You can attempt basic technology questions for JSS3 here.


  • Detachable Chains

Detachable chains are made up of similar links that can be easily detached from one another. Each of the link comprise of a hook-shaped end in which adjacent articulation occur.

Detachable Chains will usually transmit power at lower speed.

Detachable Chains - Len Academy

Detachable chains can be easily assembled and disassembled by pulling up the slack and flexing the links, then sliding a link sideways.

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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