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Articles on Trending Technologies
Technical articles with clear explanations and examples
Top Keyboard Shortcuts for Google Chrome
Google Chrome is probably the fastest browser that fetches results at lightning speed. When Google was launched in September 2008, Netscape Navigator and Internet Explorer were the go-to browsers. However, it was only a matter of time when Chrome started making its strong presence and now, it is the most preferred and the most popular web browser. It has more than 1 billion active users and its ever-growing list of admirers is a testimony.The best feature is the beauty of keyboard shortcuts. Believe me, you can save a lot of time and the following shortcuts can be mastered in less ...
Read MoreTop 10 Toughest Entrance Exams in India
Life of students is a wholesome mix of intense hardship and occasional leisure. Talk about ‘exams’ and it is not hard to visualize the tormenting state that students of this generation are experiencing. The reason for such an experience is not unfound. To put in simple terms, the reason is ‘toughness.’ To get into top notch educational institutions and reputed universities, students need to crack the entrance exams.This article will throw some light on some of the toughest entrance exams in India.UPSC – Union Public Service CommissionUPSC is the administering body that conducts this examination in various tiers. The fact ...
Read MoreWhy does a wicketkeeper change his position after every over in cricket?
The wicketkeeper changes his position after every over because the bowling and the batting ends are switched after every six balls. The act of switching the ends is done to keep the game fair. In addition, it also aims to minimize any advantage that players might get due to the following extraneous factors:Ground Dimensions-Certain boundaries of ground may be shorter or longer than the rest.Wind Direction-Wind blowing even in a slightly intense pace can help both; the batsman as well as the bowler.The Condition of the Pitch − Usually an innings of an ODI match consists of 50 overs, T20-20 ...
Read MoreGeneral Features of Traction Motors: Mechanical Features & Electrical Features
An electric motor which is used to provide the primary rotational torque to a machine such as electric locomotives, elevators, conveyors, trolley buses and other electric vehicles etc. is described as a traction motor.General Features of Traction MotorsThe general features of the electric motors used for traction purpose are classified into two classes as −Mechanical FeaturesElectrical FeaturesMechanical Features of Traction MotorsThe mechanical features of electric motors used for traction applications are listed below −Robustness - A traction motor must be mechanically strong and robust so that it can be capable of withstanding severe mechanical vibrations.Small Size - The overall dimensions ...
Read MoreSystems of Track Electrification: Composite System of Track Electrification
There is no system of track electrification which is good in all aspects, i.e. it suffers from some disadvantage.The composite system (as the name implies) combines together any two of the systems of track electrification so as to incorporate good points of both the systems. The composite systems presently being used are as −Single-Phase AC to Three-Phase AC SystemSingle-Phase AC to DC SystemSingle-Phase AC to Three-Phase AC SystemThe single-phase to three-phase system of track electrification is also known as Kando System. As the three phase AC traction system has some disadvantages such as tapping of power supply through two overhead conductors ...
Read MoreWhat is Third Rail Traction System? – Advantages and Disadvantages
What is Third Rail Traction System?A third rail is a method of providing electric power to an electric train through a semi-continuous rigid conductor placed along-side or between the running rails of a railway track.The third rail system uses an additional rail, called as conductor rail for supplying electrical power to the train. On most of the traction system, the conductor rail is placed on the sleeper ends outside the running rails, but in some cases a central conductor rail is used. The conductor rail is supported on ceramic insulators or insulated brackets, typically at intervals of 3 meters.The third ...
Read MoreWhat is Non-Electric Traction System? – Types, Advantages and Disadvantages
A non-electric traction system is a type of traction system that does not use electrical energy for the movement of a vehicle at any stage.Types of Non-Electric Traction SystemThe most popular non-electric traction systems are −Steam Engine DriveInternal Combustion (IC) Engine Drive or Diesel Engine DriveIn this article, we will highlight the advantages and disadvantages of using these two types of non-electric traction system.Steam Engine DriveIn the steam engine drives, the reciprocating steam engine is used for getting the required motive power. The steam engine drive is not used in these days due to various reasons. However, it is still ...
Read MoreWhat is Electro-Extraction? – Definition, Process and Applications
What is Electro-Extraction?Electro-extraction, also known as electro-winning can be defined in several ways as −Electro-extraction is an electrochemical process that is used for production of metals with commercially acceptable purity.Electro-extraction is the electro-deposition of metals from their ores that have been in electrolytic solution.Electro-extraction is the electrolytic process by which metals can be extracted or separated from their ores.Based upon the physical status of the metal ore, the metal can be extracted in following two ways −When the ore is in solid state - The ore is treated with strong acid to obtain its salt, again this salt is to ...
Read MoreAdvantages of 25 kV AC System of Track Electrification over DC System
DC Track Electrification SystemThe DC track electrification system is the one which uses 600 V DC to 750 V DC for urban railway services and 1500 V DC to 3000 V DC for main line services. In this DC system, the current collection system may be of the third rail type or overhead conductor type. In this system, the substation consists of a transformer and a mercury arc rectifier.25 kV AC SystemThis system of track electrification uses 25 kV industrial frequency AC supply collected from the overhead conductor and stepped down by a transformer in the locomotive. This reduced voltage ...
Read MoreSystems of Track Electrification: DC Electrification System
In the direct current (DC) system, DC series motors are used for running the electric trains. The DC series motors are used in electric trains due to their following advantages −They have very high starting torque.DC series motor has smaller weight to power ratio.DC series motor has self-speed regulating property.They have low maintenance cost.The DC series motor has high acceleration and retardation.DC Electrification SystemIn the DC system of track electrification, the DC power to be fed to the DC series motor is obtained from substations which are located at a distance of 3 to 5 km for urban and suburban ...
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