Description : In order to have a lower cost of electrical energy generation the load factor (1) and the diversity factor should be low (2) should be low but the diversity factor should be high (3) should be high but the diversity factor should be low (4) and the diversity factor both should be high
Answer :
In order to have a lower cost of electrical energy generation the load factor and the diversity factor both should be high
asked
Apr 29, 2018
by
anonymous
Answer :
Peak load plant can never have 100 percent load factor.
asked
Mar 20, 2018
by
anonymous
Answer :
In two part tariff, variation in load factor will affect operating or running charges.
asked
Mar 20, 2018
by
anonymous
Answer :
High load factor indicates total plant capacity is utilised for most of the time.
asked
Mar 20, 2018
by
anonymous
Answer :
Load factor of a power station is generally less than unity.
asked
Mar 20, 2018
by
anonymous
Answer :
Load factor of a power station is defined as average load/maximum demand.
asked
Mar 20, 2018
by
anonymous
Description : Load factor is the (1) Ratio of maximum load on the station to sum of consumer's maximum load. (2) Ratio of average demand to maximum demand. (3) Factor used for increasing load. (4) Reciprocal of (1).
Answer :
Load factor is the Ratio of average demand to maximum demand.
asked
Apr 30, 2018
by
anonymous
Description : A transformer has negative voltage regulation when its load power factor is (1) Zero (2) Unity (3) Leading (4) Lagging
Answer :
Leading
asked
Apr 30, 2018
by
anonymous
Description : The load duration curve for unity load factor will be of (1) Rectangular shape (2) Triangular shape (3) L -shape (4) I -shape
Answer :
The load duration curve for unity load factor will be of Rectangular shape
asked
Apr 30, 2018
by
anonymous
Description : Power station having Load factor = 70%, capacity factor = 50%, used factor = 60%, maximum demand = 20MW then annual energy production is (1) 122.8 GWh (2) 198.55 GWh (3) 128.2 GWh (4) 188.82 GWh
Answer :
Power station having Load factor = 70%, capacity factor = 50%, used factor = 60%, maximum demand = 20MW then annual energy production is 122.8 GWh
asked
Apr 29, 2018
by
anonymous
Description : In a synchronous generator delivering lagging power factor load (1) the excitation emf leads terminal voltage by the power angle (2) the excitation emf lags terminal voltage by the power angle (3) excitation emf leads the terminal voltage by the power factor angle (4) excitation emf lags the terminal voltage by the power factor angle
Answer :
In a synchronous generator delivering lagging power factor load the excitation emf leads terminal voltage by the power angle
asked
Apr 29, 2018
by
anonymous
Answer :
The power factor of a single phase load can be calculated if the instruments available are three ammeters or three voltmeters.
asked
Mar 21, 2018
by
anonymous
Description : Minimum voltage regulation occurs when the power factor of the load is?
Answer :
Minimum voltage regulation occurs when the power factor of the load is leading.
asked
Mar 19, 2018
by
anonymous
Description : If the load of the normally excited synchronous motor is increased the power factor will?
Answer :
If the load of the normally excited synchronous motor is increased the power factor will become lagging.
asked
Mar 18, 2018
by
anonymous
Description : The synchronous motor which works on leading power factor and does not drive any mechanical load is called?
Answer :
The synchronous motor which works on leading power factor and does not drive any mechanical load is called synchronous condenser.
asked
Mar 18, 2018
by
anonymous
Answer :
Most common form of A.C. meters met with in every day domestic and industrial installations are induction type single phase energy meters.
asked
Mar 21, 2018
by
anonymous
Answer :
The wattage of motor for driving domestic sewing machine will be around 100 to 150 W.
asked
Mar 20, 2018
by
anonymous
Answer :
Generators for peak load plants are usually designed for maximum efficiency at 50 to 75 percent full load.
asked
Mar 20, 2018
by
anonymous
Description : The following formula is correct: (A) Load factor=Average load for a period/ Peak load for the same period (B) Load factor=Average load for a period x Peak load for the same period (C) Load factor=Average load for a period + Peak load for the same period (D) All of the above
Answer :
The following formula is correct: (A) Load factor=Average load for a period/ Peak load for the same period (B) Load factor=Average load for a period x Peak load for the same period (C) Load factor=Average load for a period + Peak load for the same period (D) All of the above
asked
May 8, 2018
by
anonymous
Description : Power factor of an inductive circuit is usually improved by connecting capacitor to it in?
Answer :
Power factor of an inductive circuit is usually improved by connecting capacitor to it in parallel.
asked
Mar 25, 2018
by
anonymous
Answer :
The power factor of a single-phase induction motor is usually lagging.
asked
Mar 20, 2018
by
anonymous
Answer :
An induction motor has relatively high power factor at near full load.
asked
Mar 20, 2018
by
anonymous
Answer :
In a distribution system, in order to improve power factor, the synchronous capacitors are installed at the receiving end.
asked
Mar 20, 2018
by
anonymous
Answer :
For a consumer the most economical power factor is generally 0.95 lagging .
asked
Mar 20, 2018
by
anonymous
Answer :
In an interconnected system, the diversity factor of the whole system increases.
asked
Mar 20, 2018
by
anonymous
Answer :
The primary reason for low power factor is supply system is due to installation of induction motors.
asked
Mar 20, 2018
by
anonymous
Answer :
A low utilization factor for a plant indicates that plant is used for stand by purpose.
asked
Mar 20, 2018
by
anonymous
Answer :
For high value of diversity factor, a power station of given installed capacity will be in a position to supply more number of consumers.
asked
Mar 20, 2018
by
anonymous
Answer :
Power plant having maximum demand more than the installed rated capacity will have utilisation factor more than unity.
asked
Mar 20, 2018
by
anonymous
Answer :
Diversity factor has direct effect on the fixed cost of unit generated.
asked
Mar 20, 2018
by
anonymous
Answer :
Demand factor is defined as maximum demand/connected load.
asked
Mar 20, 2018
by
anonymous
Description : Can a synchronous condenser improve power factor?
Answer :
Yes, synchronous condenser can improve power factor.
asked
Mar 19, 2018
by
anonymous
Description : What is the maximum value of power factor?
Answer :
1 is the maximum value of power factor.
asked
Mar 19, 2018
by
anonymous
Description : Compare base load plant with peak load plant.
Answer :
Sr.No. Points Base load plant Peak load plant 1 Definition The power plant which supplies base load of load curve is known as base load plant The power ... power station Small capacity storage hydro, pumped storage hydro, gas, diesel power station.
asked
Jul 24, 2019
by
anonymous
Answer :
1. Connected Load: It is the sum of load of all equipment's connected to supply system which are in use or not in use of each consumer. OR The sum of connected load of all consumers ... is the maximum load which a consumer uses at a particular time period out of his total connected load.
asked
Jul 24, 2019
by
anonymous
Answer :
Nuclear power plant is invariably used as base load plant.
asked
Mar 20, 2018
by
anonymous
Answer :
In a load curve the highest point represents peak demand.
asked
Mar 20, 2018
by
anonymous
Answer :
Generating capacity connected to the bus bars and ready to take load when switched on is known as spinning reserve.
asked
Mar 20, 2018
by
anonymous
Answer :
The increased load during summer months is due to increased use of fans and air conditioners.
asked
Mar 20, 2018
by
anonymous
Answer :
Load curve is useful in deciding the operating schedule of generating units, sizes of generating units, total installed capacity of the plant.
asked
Mar 20, 2018
by
anonymous
Answer :
The area under a load curve gives energy consumed.
asked
Mar 20, 2018
by
anonymous
Answer :
A load curve indicates average kWh (kW) energy consumption during the period.
asked
Mar 20, 2018
by
anonymous
Answer :
The standard full-load power factor ratings for synchronous motors are unity or 0.8 leading.
asked
Mar 20, 2018
by
anonymous
Description : State the effects of low power factor on efficiency and voltage regulation of short transmission lines.
Answer :
i) Effect of Low power factor on efficiency:- When power factor of load reduces current drawn by transmission line increases so copper losses in transmission line increases, hence transmission ... increases, so voltage drop in transmission line increases so regulation increases. (Become Poor)
asked
May 22, 2020
by
anonymous
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.
asked
May 17, 2020
by
anonymous
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
asked
May 17, 2020
by
anonymous
Description : Define leakage factor.
Answer :
It is the ratio of total flux to leakage flux.
asked
May 5, 2020
by
anonymous
Description : Define PIV, TUF, ripple factor, efficiency of rectifier.
Answer :
Peak Inverse Voltage (PIV): The maximum value of reverse voltage (for the diode in a rectifier) occurring at the peak of the negative cycle of the input cycle is called Peak Inverse Voltage. ... dc power delivered to the load to the ac input power from the secondary winding of the transformer.
asked
May 2, 2020
by
anonymous
Description : working of distortion factor meter with block diagram
Answer :
Working : Initially the switch S is kept at position 1.The attenuator gets excluded and the bridge T network is adjusted for full suppression of fundamental frequency and hence we get ... is obtained on the meter.Thus the total rms distortion is indicated by the reading of attenuator.
asked
Aug 21, 2019
by
anonymous
Description : Why capacitors are used to improve power factor?
Answer :
Capacitors generate reactive power instead of that drawn from source which is required by inductive loads.so it reduce the reactive current which is drawn from source to be drawn from capacitor.This control in Electric bills cost.
asked
Aug 18, 2019
by
anonymous