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What can you do to prevent a power surge?

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Description : Can a power surge erase a hard drive?

Description : Can power surge damage your computer?

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  

Description : State the purpose of surge tank and spill way in hydroelectric power station.

Answer : Surge tank :- A surge tank is the small reservoir or tank. It is open at the top. It is installed near Vale house of turbine. It avoids water hammer effect when load on turbine reduces. (It ... ; during floods etc. In this way spill way avoids damage of dam due to excess pressure of water.

Description : What is meant by a voltage surge?

Description : State the function of following with respect to hydro power plant : I) Storage reservoir II) Surge tank II) Spillways IV) Trash rack

Answer : I) Storage reservoir: It is the basic requirement of hydroelectric plant. Its purpose is to store water which may be utilized to run the prime mover to produce electrical power. A reservoir stores during ... of nozzles of impulse turbines. It is made of steel bars and is placed across the intake.

Description : The function of a surge tank is to  (1) produce surge in the pipeline (2) relieve water hammer pressure in the penstock (3) supply water at constant pressure (4) none of above

Answer : The function of a surge tank is to relieve water hammer pressure in the penstock

Description : The surge impedance for over head line is taken as  (1) 10-20 ohms (2) 50-60 ohms (3) 100-200 ohms (4) 1000-2000 ohms

Answer : The surge impedance for over head line is taken as 100-200 ohms

Description : Surge absorbers are used for protection against

Answer : Surge absorbers are used for protection against low voltage high frequency oscillations

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

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. 

Description : Why do we need to correct power factor?

Description : How often do power surges occur?

Description : What is a surge point and how do you prevent surging, in centrifugal compressors?

Answer : Surge point is the point on the performance curve where a further decrease inflow (typically in the region of 50-70 % of rated capacity) causes instability, resulting in a pulsating flow, ... to thrust reversals, or excessive vibration. Bypass valves advents are commonly used to prevent surging. 

Description : What is the use of power factor correction?

Description : What is the best power factor?

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

Description : What is power factor angle?

Description : What is a digital power meter?

Description : What is an RF Power Meter?

Description : What causes random power outages?

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

Description : What is power logger?

Description : What are the power quality disturbance?

Description : What is harmonic in power quality?

Description : What is a power quality analyzer?

Description : What is power quality meter?

Description : What are the different power quality issues?

Description : What is good power quality?

Description : What is power quality monitoring?

Description : What is meant by power dip?

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

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 .

Description : How do you calculate power loss?

Description : How do you power an Arduino?

Description : How do you find power in a circuit?

Answer : Power can be find in a circuit by the means of meters .if an individual want to check for a power in a circuit he/she Calabria the meters on a high voltage range and put the meters Lee in parallel with the circuit he /she will know the amount of power within that circuit .

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

Description : Briefly explain how the power factor of an inductive circuit can be improved.

Answer : As we know that power factor should be corrected to ensure that the current supplied is cost friendly. Meaning the power factor should be around one but not greater than one(0.8-0.9) in a ... an inductive circuit due to the inductive reactance which oppose the change of current in the ac circuit. 

Description : The resolving power of a spectrometer consisting of collimator, a grating and a telescope can be increased by (A) increasing the angular magnification of the telescope (B) increasing the period of the ... (C) decreasing the period of the grating (D) decreasing the slit-width of the collimator

Answer : The resolving power of a spectrometer consisting of collimator, a grating and a telescope can be increased by decreasing the period of the grating

Description : In a circuit containing R, L and C, power loss can take place in?

Answer : In a circuit containing R, L and C, power loss can take place in R only.

Answer : The power factor of a single phase load can be calculated if the instruments available are three ammeters or three voltmeters.

Answer : Approximate estimation of power demand can be made by load survey method, statistical methods, mathematical method, economic parameters.

Answer : The inductive interference between power and communication line can be minimized by transposition of the power line, transposition of the communication line.

Answer : The steady state stability of the power system can be increased by connecting lines in parallel.

Description : The maximum load that a power transformer can carry is limited by its?

Answer : The maximum load that a power transformer can carry is limited by its voltage ratio.

Description : Can a synchronous condenser improve power factor?

Answer : Yes, synchronous condenser can improve power factor.

Description : How can we improve power factor using synchronous motor?

Description : How can power loss be reduced?

Description : Why high voltage can reduce power loss?

Answer : when voltage has increased due to reduced current flow, thus power loss given by ( I^2R) will be low due to reduced current(I^2) provided that resistance (R) is constant.

Answer : Yes, we can make the power factor of synchronous motor leading by adjusting its excitation.

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