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What causes random power outages?
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Description :

What are the main causes of harmonics?

Answer :

Harmonic is a non linear load because linear load voltage deviated due to connection of some electrinie device such as converter,inverter

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Description :

What causes transients?

Answer :

Transient is a peak voltage take small period. It will occur due to lightning

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Description :

What causes lights to dim in house?

Answer :

While taking a more load from other Equipment

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Description :

What causes diodes to fail in alternator?

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Answer :

Transformer noise is generated due to vibration of core and winding this is because of magnetostriction and magnetomotive force.

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Description :

State the external causes of failure of electrical equipment.

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What is the use of power factor correction?

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What is the best power factor?

Answer :

It is unity power factor but difficult to achieve in dynamic loads

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Description :

What is power factor angle?

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What is a digital power meter?

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What is an RF Power Meter?

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Description :

What is the advantage of high power factor?

Answer :

Reduced copper losses Smaller conductor size Improve voltage regulation Increase system capability Less energy bill

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Description :

What is power logger?

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What are the power quality disturbance?

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Description :

What is harmonic in power quality?

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What is a power quality analyzer?

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Description :

What is power quality meter?

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What are the different power quality issues?

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What is good power quality?

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What is power quality monitoring?

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What can you do to prevent a power surge?

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Description :

What would cause a power surge in a house?

Answer :

If your neibour / other flat owners / your maintainer staff switch on any type of inductive load that can cause power surge / dip  

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Description :

What is meant by power dip?

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Description :

Can you have a power factor greater than 1?

Answer :

We cannot have power factor greater than 1. As it is a measure of cosine of angle between voltage and current. 

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Description :

Why do we need to correct power factor?

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Description :

How do you measure power factor?

Answer :

P= 1.83*V*I*[email protected] where P is power           V is voltage            I is current           COS @ is P.F [email protected]= P/(1.83*V*I)  in other way cos @ = true power/apparent power

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Can a power surge erase a hard drive?

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Can power surge damage your computer?

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Description :

How often do power surges occur?

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Answer :

Power quality is important because the electrical appliances will works better and will be safer and less loss in energy. Low energy waste and improves stability of power system .

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Answer :

By applying various power quality monitoring devices and using telecommunication technique .

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Description :

What is the value of capacitance required to improve power factor from 0.7 to 0.9. Given that: Real power = 50 W Vrms of the source = 120 Frequency = 50 Hz   #powerfactor

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Description :

What are the basic requirements of locating wind power plant ?

Answer :

The basic requirements of locating wind power plant:  1) The site should be selected where winds are strong i.e. where pressure of wind is high and there is continuity. 2) Wind pressure ... the turbine which can affect the system's overall performance. 10)Possibility to connect to power grid. 

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Description :

What are the criteria for selection of site for hydroelectric power plant?

Answer :

Following Factors to be kept while site selecting for Hydro power plant:  1. It should be located where high rain fall occurs. 2. A large catchments area must be available to store water. 3. It ... 12. Cost of land should be less. 13. Skilled and unskilled man power should be available nearby.

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Description :

Options: A) WATT B) AMPERE C) VOLTS D) OHM

Answer :

Correct Answer: A) WATT

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Description :

What is the choice of size and number of generator units in interconnected power system?

Answer :

Choice of Size and Number of Generating Units: 1. The size/rating and number of generating units in such way that they approximately match with the load curve as closely as possible. 2. In ... , if power plant is connected to grid system then generating unit of higher capacity can be installed.

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Description :

What is need of regulated power supply?

Answer :

A regulated power supply is used to ensure that the output remains constant even if the input changes. But sometimes main supply voltage, load, and surrounding temperature keep changing and altering the ... power supply is needed that will accept an AC input and give a constant DC output.

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Description :

What is the Power Supply specification for 8085AH microprocessor? A) Single +5V supply with 10% voltage margins B) Dual +5V supply with 10% voltage margins C) Single +10V supply with 5% voltage margins D) Dual +5V supply with 5% voltage margins 

Answer :

What is the Power Supply specification for 8085AH microprocessor? A) Single +5V supply with 10% voltage margins B) Dual +5V supply with 10% voltage margins C) Single +10V supply with 5% voltage margins D) Dual +5V supply with 5% voltage margins 

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Description :

What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage:  (A) Eddy Current and Hysteresis losses will be excessive  (B) Current will be too much high  (C) Transformer may start to smoke and burn  (D) No effect

Answer :

What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage:  (A) Eddy Current and Hysteresis losses will be ... will be too much high  (C) Transformer may start to smoke and burn  (D) No effect

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Description :

What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these

Answer :

What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these

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Description :

To protect the power transformer (Y-Y with neutral grounded) against fault, what type of connection do the CTs have ?

Answer :

To protect the power transformer (Y-Y with neutral grounded) against fault, what type of connection do the CTs have ? Δ-Δ connection

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Description :

What is the maximum value of power factor?

Answer :

1 is the maximum value of power factor.

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Description :

What is the power factor of purely resistive circuit.

Answer :

Unity that is 1

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Description :

What is the relationship between power and resistance?

Answer :

P = I2R Where P = power I = Current R = Resistance

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Description :

What is the relationship between power and current?

Answer :

P = I2R Where P = power I = Current R = Resistance This the relationship between current and power.

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Description :

What is the symbol for AC power?

Answer :

If you need to measure alternating current in a circuit, different multimeters have different symbols to measure it (and the corresponding voltage), usually "ACA" and "ACV," or "A" and "V" with a squiggly line (~) next to or above them.

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Description :

What is base load and peak load power plants?

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Description :

What is a high tension power line?

Answer :

High tension power line is a high voltage of 115 kv and power line is underground transimissio used by urbun areas

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Description :

What is the purpose of the turbines in coal fired power plants?

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