What is meant by a voltage surge?

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asked Mar 10, 2018 by anonymous

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What can you do to prevent a power surge?

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What would cause a power surge in a house?

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The function of a surge tank is to

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

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

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asked May 1, 2018 by anonymous

The surge impedance for over head line is taken as

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

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

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asked Sep 8, 2018 by anonymous

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

Last 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.

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asked Sep 8, 2018 by anonymous

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

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asked Apr 26, 2018 by anonymous

Surge absorbers are used for protection against

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

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asked Mar 10, 2018 by anonymous

What can cause a voltage spike?

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What is the cause of voltage fluctuation?

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What is voltage interruption?

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What is voltage sags and swells?

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What is meant by power dip?

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asked May 1, 2018 by anonymous

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque (1) Decreases (2) Increases (3) Remains constant (4) None of the above

Last answer: The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque Increases

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asked Mar 21, 2018 by anonymous

If the current in a capacitor leads the voltage by 80°, the loss angle of the capacitor is?

Last answer: If the current in a capacitor leads the voltage by 80°, the loss angle of the capacitor is 10°.

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The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is?

Last answer: The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is 0.5.

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An SSB transmitter produces a peak-to-peak voltage of 200 V across a 100 Ω antenna load. What is the Peak

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Last answer: An SSB transmitter produces a peak-to-peak voltage of 200 V across a 100 Ω antenna load. What is the Peak Envelope Power? A) 49.98 W B) 79.98 W C) 99.96 W D) 199.93 W

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asked Apr 29, 2018 by anonymous

What is a capacitor voltage transformer?

What is a capacitor voltage transformer? A) It is a transformer used in power systems to step up low voltage signals and provide extra high voltage B) It is a transformer used in power systems to step up high voltage signals and provide extra high voltage C) It is a transformer used in power systems to step down extra high voltage signals and provide low voltage D) None of these

Last answer: What is a capacitor voltage transformer? A) It is a transformer used in power systems to step up low voltage signals and provide extra high voltage B) It is a transformer used in power systems ... power systems to step down extra high voltage signals and provide low voltage D) None of these

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asked Apr 29, 2018 by anonymous

What is the RMS voltage in a series RL circuit, if the voltage across R and L is 256 V and 192 V respectively?

What is the RMS voltage in a series RL circuit, if the voltage across R and L is 256 V and 192 V respectively? A) 320 V B) 448 V C) 64 V D) None of these

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asked Apr 28, 2018 by anonymous

In voltage source converter based HVDC transmission system the active power is controlled by changing

In voltage source converter based HVDC transmission system the active power is controlled by changing (A) phase angle of the converter ac input voltage (B) supply frequency of the converter ac input voltage (C) magnitude of the converter ac input voltage (D) DC voltage at the inverter terminals

Last answer: In voltage source converter based HVDC transmission system the active power is controlled by changing phase angle of the converter ac input voltage

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asked Mar 20, 2018 by anonymous

The voltage regulation in magnetic amplifier type voltage regulator is effected by?

Last answer: The voltage regulation in magnetic amplifier type voltage regulator is effected by varying the reactance.

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asked Apr 29, 2018 by anonymous

Consider a circuit with four resistors in series connected to a voltage source. What happens to the voltage

Consider a circuit with four resistors in series connected to a voltage source. What happens to the voltage across each resistor, if the value of each of the resistors is doubled? A) It will double B) It will remain the same C) It will be halved D) It will become zero

Last answer: Consider a circuit with four resistors in series connected to a voltage source. What happens to the voltage across each resistor, if the value of each of the resistors is doubled? A) It will double B) It will remain the same C) It will be halved D) It will become zero

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Find power delivered by voltage source

Last answer: Find power delivered by voltage source

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asked Jun 18, 2018 by anonymous

The SCR would be turned OFF by voltage reversal of applied anode-cathode ac supply frequency of

The SCR would be turned OFF by voltage reversal of applied anode-cathode ac supply frequency of A) 10 kHz B) 10 Hz C) 5 kHz D) 5 Hz

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asked May 8, 2018 by anonymous

The voltage of transmission can be regulated by

The voltage of transmission can be regulated by (A) Use of tap changing transformers (B) Switching in shunt capacitors at the receiving end during heavy loads (C) Use of capacitors to neutralize the effect of series reactance (D) Any of the above methods

Last answer: The voltage of transmission can be regulated by (A) Use of tap changing transformers (B) Switching in shunt capacitors at the receiving end during heavy loads (C) Use of capacitors to neutralize the effect of series reactance (D) Any of the above methods

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asked Jan 24, 2020 by anonymous

What is terminal voltage ?

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asked Sep 4, 2018 by anonymous

What is internal voltage drop and terminal voltage?

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asked Aug 11, 2018 by anonymous

What is line voltage and phase voltage?

What is line voltage and phase voltage? Draw balanced three phase star connected system. Show all the voltages and currents.

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asked Apr 29, 2018 by anonymous

What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased?

What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known

Last answer: What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known

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asked Mar 10, 2018 by anonymous

What is the unit of measure for voltage?

Last answer: Voltage measured in volts.

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asked Mar 10, 2018 by anonymous

What equipment is used to measure voltage?

Last answer: Voltmeter is used to measure voltage.

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What is an analog voltage?

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What is dielectric withstand voltage?

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asked Mar 10, 2018 by anonymous

What is the definition of extra low voltage?

Last answer: Extra-low voltage (ELV) is an electricity supply voltage in a range which carries a low risk of dangerous electrical shock.

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asked Mar 10, 2018 by anonymous

What is the difference between line and phase voltage?

Last answer: Line voltage is voltage between two phases R &Y (415 v) while phase voltage is the voltage between one phase and a neutral B & N (240 v).

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asked Mar 10, 2018 by anonymous

What is impulse voltage of transformer?

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asked Mar 10, 2018 by anonymous

What is Extra High Voltage?

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asked Mar 10, 2018 by anonymous

What is considered low voltage and high voltage?

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asked Dec 22, 2017 by anonymous

What is the voltage in 3 phase line?

Last answer: between 430 to 440 v

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What is the threshold voltage?

Last answer: 440

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What is meant by a voltage surge?

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