Voltage Telemetry System
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 wire line. The sliding contact is positioned by a pressure sensitive, Bourdon tube. The telemetric…
Telemetry Systems
In modern measurement systems, the various components comprising the system are usually located at the distance from each other. It is, therefore, becomes necessary to transmit the data and information between them through some form of communication channel. Telemetry may be defined as measurement at a distance. Telemetry is indicating,…
Difference between Amplification & Companding
Amplification It is an operation of an amplifier intended to make a signal stronger by increasing the power of a signal. The amplifier output matches the input signal shape but with a larger amplitude. It may be Linear or nonlinear. Companding It is a technique for compressing and then expanding…
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…
Steam Power Plants
Q. Why the thermal efficiency of a steam power plant is quite low? Ans. In a steam power station, more than 50% of the total heat of combustion is lost as heat rejected to the condenser and this loss is unavoidable as heat energy cannot be converted into mechanical energy…
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…
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…
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?…
Power Factor Improvement
Q. What is the necessity of power factor improvement? Ans. Low power factor causes the ratings of generators and transformers, the cross-sectional area of the bus-bars and the contact surface of the switchgear, the size of the feeders and distributors, energy losses, voltage drops in generators, transformers, transmission lines and…
Diesel Electric Power Plants
Q. What is the basic difference between a diesel engine and a steam turbine? Ans. The main difference between a diesel engine and a steam turbine is that in the diesel engine the chemical energy of combustion is released inside the cylinder whereas in case of steam turbine the energy…