Monday, April 7, 2014

Electrical job question: What is Power Factor ?

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Types of Current: There are two types of currents present in the AC circuits. The current required by induction motors, transformers, ...

Methods to avoid low Power Factor

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Some of the methods to improve power factor are: 1.      Induction motors have maximum  power factor  when they are fully loaded and...
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Causes of Low Power Factor ?

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Some of the reasons for low power factor are: Induction motors and Transformers: Where ever the magnetising current is to be produ...

Why Instrument Transformers Used and Advantages

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Voltmeters and Ammeters are used to measure the voltage and current in the circuits. Using instrument transformers ranges of these devices...
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Moving Coil (MC) Instruments Advantages Disadvantages

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The operation of moving coil meters depends on the electromagnetic effect of the current ( a force is excerted on the current carrying con...
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Difference between Current Transformer (CT) and Potential Transformer (PT)

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Current Transformers (CT) and Potential Transformers (PT) are used to measure the current and voltage in a circuit of the order of hundred...
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Indian Engineering Services (IES) Objective Questions and Answers:Machines1

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Indian Engineering Services Objective Questions and Answers 1) Match the Following   ( IES- 2003)         List I                  ...

Indian Engineering Services (IES) Objective Questions and Answers:Machines

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1) A self excited d.c shunt generator, driven by its prime mover at the rated speed fails to build up the voltage across its terminals at ...
Saturday, April 5, 2014

TRAIN LIGHTNING SHOP

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T he shop deals with the periodical over haul of the fans, batteries and the rotary switches used in the train. The basic details of the e...
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POWRE HOUSE

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Power is supplied to the entire workshop with the help of two feeders north and south. If any fault occurs in any one of the two feeders, ...
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