Global Warming | Effects of Global Warming

Global Warming The term ‘Global Warming’ was given by Wally Broecker. Global warming is a phenomenon which refers increase in average temperature of the atmosphere of the earth over a long period of time. Before the pre-industrial revolution, the average atmospheric temperature of the earth was 15°C. Currently it is 16.6°C. In last 100 years … Read more

Captive Power Plants

Due to the frequent increase in electricity tariff charged by the electric utility, poor reliability of electric supply, forced outages, long power cuts, etc., a large number of industries have switched over to their own generating station (plant) within their own campus. This method of generation is called Captive Power Generation and such plants are … Read more

Pollution | Classifications of Pollution

Definition of Pollution Pollution can be defined as an undesirable change in the chemical, physical or biological characteristics of air, soil, water and other physical domains that may harmfully affect the life or create a potential health hazard of any living organism. It can occur naturally, for example through volcanic eruptions, or as the result of … Read more

Underground Distribution Lines

Q. For what purpose metallic sheath is provided in underground cables? Ans. The metallic sheath is provided around the insulation to protect it against ingress of moisture, gas or other damaging liquids (acid or alkalies) from the soil and atmosphere. Q. Why is a layer of bedding provided over the metallic sheath in underground cables? … Read more

Voltage Telemetry System – Advantages & Applications

A voltage telemetry system transmits the measured variable as a function of AC or DC voltage. A slide wire potentiometer is connected in series with the battery. The signal transmitting medium is essentially a copper wireline. A voltage telemetry system is shown in Fig. 1.   The sliding contact is positioned by a pressure sensitive, … Read more

Hydroelectric Power Plants

Q. On what factors does the power output of a hydropower plant depend? Ans. The power developed by a hydro plant depends upon the discharge and head and is directly proportional to their (discharge and head) product. Q. What is meant by catchment area? Ans. The catchment area is the area, bounded by water sheds, … Read more

Nuclear Power Plants

Q. Name three important factors in choosing a site for an atomic power plant.   Ans. Three important factors in choosing a site for atomic power plants are: (i) availability of water supply (ii) distance from a populated area (iii) transportation facilities. Q. Name three different types of fuels used in nuclear reactors.   Ans. … Read more

Tariff for Electrical Energy

Q. What type of tariff is employed for domestic consumers? Ans. Block rate tariff Q. What is two-part tariff? Ans. In the two-part tariff, the total charge to be made to the consumer is divided into two components namely fixed charge (proportional to connected load or maximum demand) and the running or operating charges (proportional … Read more

Gas Turbine Power Plants

Q. How does a gas turbine differ from a diesel engine?   Ans. The gas turbine is different from the diesel engine in the respect that the combustion region is external to the prime mover. Q. Why are the majority of gas turbine power plants employed as peak load plants?   Ans. The majority of … Read more

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