At an industrial sub-station with a 4 MW load, a capacitor of 2 MVAR is installed to maintain the load power factor at 0.97 lagging. If the capacitor goes out of service, the load power factor becomes (A) 0.85 (B) 1.00 (C) 0.80 lag (D) 0.90 lag

1 Answer

Answer :

At an industrial sub-station with a 4 MW load, a capacitor of 2 MVAR is installed to maintain the load power factor at 0.97 lagging. If the capacitor goes out of service, the load power factor becomes  0.80 lag

Related questions

Description : A power station supplies the peak load of 60 Mw, 40 MW and 70 MW to three localities. The annual load factor is 0.50 p.u. and the diversity factor of the load at the station is 1.55. The maximum demand on the station and average load respectively will be 

Last Answer : A power station supplies the peak load of 60 Mw, 40 MW and 70 MW to three localities. The annual load factor is 0.50 p.u. and the diversity factor of the load at the station is 1.55. The maximum demand on the station and average load respectively will be 103.2 MW, 51.61 .

Description : A generating station has a maximum demand of 50 Mw, a load factor of 60%, a plant capacity factor of 45% and if the plant while running as per schedule, were fully loaded. The daily energy produced will be

Last Answer : A generating station has a maximum demand of 50 Mw, a load factor of 60%, a plant capacity factor of 45% and if the plant while running as per schedule, were fully loaded. The daily energy produced will be 720 MW.

Description : Tarapur (INDIA) atomic power station (A) Has two boiling water reactors of American design (B) Has an installed capacity of 400 MW (C) Is the first power reactor in India, which became critical in 1969 (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Description : A 3-phase 11 kV generator feeds power to a constant power unity power factor load of 100 MW through a 3-phase transmission line. The line-to line voltage at the terminals of the machine is maintained constant at 11 kV. The per ... 11 kV is  (A) 100 MVAR (B) 10.1 MVAR (C) -100 MVAR (D) -10.1 MVAR

Last Answer : A 3-phase 11 kV generator feeds power to a constant power unity power factor load of 100 MW through a 3-phase transmission line. The line-to line voltage at the terminals of the machine is maintained ... load to increase the line-to-line voltage at the load terminals to 11 kV is -10.1 MVAR

Description : A generating st ation has a maximum, demand of 20 mW, load factor of 60%, a plant capacity factor of 50% and a plant Use factor of 72%. What is the reserve capacity of the plant, if the plant, while running as per schedule, were fully loaded?

Last Answer : 5 MW is the reserve capacity of the plant, if the plant, while running as per schedule, were fully loaded.

Description : A generating station has a maximum demand of 500 MW. The annual load factor is 50 percent. The energy generated per annum will be: A) 2.19 x 106 MWhr B) 600 MWhr C) 250 MWhr D) 7.50 x 106 MWhr

Last Answer : A generating station has a maximum demand of 500 MW. The annual load factor is 50 percent. The energy generated per annum will be: 2.19 x 106 MWhr 

Description : A generating station has a maximum demand of 30 MW, a load factor of 60% and a plant capacity factor of 50%. The reserve capacity of the plant is   (a) 5 MW (b) 4 MW (c) 6 MW (d) 10 MW 

Last Answer : A generating station has a maximum demand of 30 MW, a load factor of 60% and a plant capacity factor of 50%. The reserve capacity of the plant is 6 MW

Description : A loss less transmission line having Surge Impedance Loading (SIL) of 2280 MW is provided with a uniformly distributed series capacitive compensation of 30%. Then, SIL of the compensated transmission line will be (A) 1835 MW (B) 2280 MW (C) 2725 MW (D) 3257 MW

Last Answer : A loss less transmission line having Surge Impedance Loading (SIL) of 2280 MW is provided with a uniformly distributed series capacitive compensation of 30%. Then, SIL of the compensated transmission line will be 2280 MW

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

Last Answer : Power station having Load factor = 70%, capacity factor = 50%, used factor = 60%, maximum demand = 20MW then annual energy production is 122.8 GWh

Description : An industrial consumer hall a daily load pattern of 2000 KW, 0.8 lag for 12 Hra and 1000 kW UPF for 1J Hr. The load factor i= _____. 

Last Answer : An industrial consumer hall a daily load pattern of 2000 KW, 0.8 lag for 12 Hra and 1000 kW UPF for 1J Hr. The load factor i= 0.6 . 

Description : Two synchronous generators operating in parallel supply a common load of 2.5 MW. The frequency-power characteristics have a common slope of 1 MW/Hz and the no-load frequencies of the generators are 51.5 Hz and 51.0 Hz, ... system frequency is (A) 50 Hz (B) 51 Hz (C) 51.25 Hz (D) 51.5 Hz

Last Answer : Two synchronous generators operating in parallel supply a common load of 2.5 MW. The frequency-power characteristics have a common slope of 1 MW/Hz and the no-load frequencies of the generators are 51.5 Hz and 51.0 Hz, respectively. Then the system frequency is 50 Hz

Description : A three phase transmission line delivers a load of 5 MW at 0.8 power factor lagging. Resistance of each conductor is 0.5 ohm / km. Receiving end voltage is 33 kV. If the line loss is not to exceed 10%, determine the length of the line.  (A) 7 km (B) 27.9 km (C) 56.8 km (D) 13.9 km

Last Answer : B

Description : List any two Thermal Power Station in Maharashtra with their installed capacity. 

Last Answer :  Thermal Power Station in Maharashtra with their installed capacity :

Last 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.

Description : A DC reactor is connected in series with each pole of a converter station in order to: A) prevent commutation failures in the inverter B) supply reactive power to the converter C) improve system stability D) increase the power transfer capability

Last Answer : A DC reactor is connected in series with each pole of a converter station in order to:  prevent commutation failures in the inverter

Description : If the reference bus is changed in two load flow runs with same system data and power obtained for reference bus taken as specified P and Q in the latter run, the system losses  A) Will be ... C) As well as complex bus voltage will changed D) As well as complex bus voltage will be unchanged

Last Answer : If the reference bus is changed in two load flow runs with same system data and power obtained for reference bus taken as specified P and Q in the latter run, the system losses Will be unchanged but complex bus voltages will change

Description : A transformer has negative voltage regulation when its load power factor is   (1) Zero (2) Unity (3) Leading (4) Lagging

Last Answer : 0

Description : Generally in a power system network, the load is represented as a :  (A) Constant power in both load flow study and in stability study  (B) Constant power in load flow study and constant ... impedance in load flow study  (D) Constant impedance in both load flow study and in stability study

Last Answer : Generally in a power system network, the load is represented as a : Constant power in load flow study and constant impedance in stability study 

Description : Load compensation in power systems is a process to :  (A) Maintain better voltage profile (B) Increase short circuit capacity of the system (C) Generate required harmonics for loads like arc furnaces (D) Compensate for the line reactance

Last Answer : Load compensation in power systems is a process to : Maintain better voltage profile

Description : A 3-phase, 11 kv, 50 Hz, 200 kW load has a power factor of 0.8 lag. A delta connected 3-phase capacitor is used to improve the power factor to unity. The capacitance perphase of the capacitor in micro-farads is?

Last Answer : A 3-phase, 11 kv, 50 Hz, 200 kW load has a power factor of 0.8 lag. A delta connected 3-phase capacitor is used to improve the power factor to unity. The capacitance perphase of the capacitor in micro-farads is 1.316.

Description : The yearly load duration curve of a power plant is a straight line. The maximum load is 750 MW and the minimum load is 600 Mw. The capacity of the plant is 900 MW. What is the capacity factor and utilization factor? 

Last Answer : 0.75, 0.83 is the capacity factor and utilization factor.

Description : Will getting industrial air conditioning installed improve the life of my employees?

Last Answer : Industrial air conditioning will definitely improve the life of your employees. Think about all the less complaining you will deal with and they will have a much easier environment to work in.

Description : Where is Tala Hydroelectric project, which is expected to generate 1020 MW power, located? (1) Arunachal Pradesh (2) Bhutan (3) Nepal (4) Himachal Pradesh

Last Answer : (2) Bhutan Explanation: Tala Hydroelectricity project is the biggest hydroelectric joint project between India and Bhutan so far, generating 4865 GWh/yr. Tala is located in Chukha Dzongkhag in western ... planned for June 2005, but because of geological problems this was delayed until March 2007.

Description : In measuring crosstalk using dBx unit the reference power is A. 1 mW B. 1 W C. 1 pW D. 6 mW

Last Answer : C. 1 pW

Description : Part of a microwave link can be approximated by free space conditions. The antenna gain are each 40 dB, the frequency is 10 GHz, and the path length is 80 km. Calculate the receive power for a transmitted power of 10 W? A. 0.871 μW B. 871 μW C. 0.871 mW D. 871 nW

Last Answer : A. 0.871 μW

Description : ECE Board Exam November 1996 What is the applied power if a thermal RF wattmeter is connected to a transmitter through a variable attenuator? The wattmeter reads 84 mW when 15 dB of attenuation is used. A. 4.656 watts B. 2.656 watts C. 3.656 watts D. 2.856 watts

Last Answer : B. 2.656 watts

Description : ECE Board Exam November 1996 What is the applied power if a thermal RF wattmeter is connected to a transmitter through a variable attenuator? The wattmeter reads 84 mW when 15 dB of attenuation is used. A. 4.656 watts B. 2.656 watts C. 3.656 watts D. 2.856 watts

Last Answer : A. PAM

Description : ECE Board Exam March 1996 The power of standard test tone is normally ____________. A. 1 dB B. 0 mW C. 1 mW D. 1 W

Last Answer : C. 1 mW

Description : Nuclear power generation capacity in India is (A) 3000 MW (B) 10000 MW (C) More than hydroelectric power generation capacity (D) More than thermal power generation capacity

Last Answer : (A) 3000 MW

Description : Bhabha Atomic Research Centre (BARC) located at Trombay (near Bombay, INDIA) has (A) Five operating research reactors (namely Apsara, Cirus Zerelina, Purnima and Dhurva) (B) A 420 MW nuclear power plant (C) A very large capacity (100 tons/yr) heavy water plant (D) All (A), (B) and (C)

Last Answer : (A) Five operating research reactors (namely Apsara, Cirus Zerelina, Purnima and Dhurva)

Description : For a single mode optical cable with 0.25 dB/km loss, determine the optical power 100 km from a 0.1-mW light source. ∙ A. -45 dBm ∙ B. -15 dBm ∙ C. -35 dBm

Last Answer : ∙ C. -35 dBm

Description : The electrical power unit Giga Watt (GW) may be written as a) 1,000,000 MW b) 1,000 MW c) 1,000 kW d) 1,000,000 W

Last Answer : b) 1,000 MW

Description : By the year 2022, the Climate Change Action Plan of Government of India aims at installing (A) 20,000 MW of wind power (B) 25,000 MW of wind power (C) 20,000 MW of solar power (D) 10,000 MW of solar power

Last Answer : (C) 20,000 MW of solar power

Description : Where is Tala Hydroelectric project, which is expected to generate 1020 MW power, located ? (1) Arunachal Pradesh (2) Bhutan (3) Nepal (4) Himachal Pradesh

Last Answer : Bhutan

Description : For steam power plant having capacity 600 MW capacity a cooling tower is required to set up with condenser. Suggest the type of condenser and cooling tower with justification. 

Last Answer : For Steam power plant having Capacity 600 MW the requirement of condenser and cooling tower is as follow. 1) Condenser:- Given Capacity is medium to low capacity for this we can use Jet Condenser ... and efficiency of tower is high  -Temperature of water coming out from tower can be controlled.

Description : For a 210 MW, turbo-alternator in a thermal power plant, the possible specifications of rotor diameter, stator core length, and number of poles, respectively, are (A) 4.4 m, 1.2 m, 12 (B) 1.2 m, 4.4 m, 2 (C) 4.4 m, 1.2 m, 24 (D) 1.2 m, 4.4 m, 8

Last Answer : For a 210 MW, turbo-alternator in a thermal power plant, the possible specifications of rotor diameter, stator core length, and number of poles, respectively, are 1.2 m, 4.4 m, 2

Description : The output power of a filter is 100 mW, when the signal frequency is 6 kHz. When the frequency is increased to 25 kHz, the output power falls to 50 mW. What is the dB change in power ? (a) -3 dB (b) -5 dB (c) -7 dB (d) -2 dB

Last Answer : The output power of a filter is 100 mW, when the signal frequency is 6 kHz. When the frequency is increased to 25 kHz, the output power falls to 50 mW. What is the dB change in power ?  -3 dB 

Description : Calculate the power loss, if power generated by two plants are P1=50 MW and P2 =40 MW and the loss coefficients are B11=0.001, B22=0.0025 and B12=-0.0005.  (A) 4.5 MW (B) 5.5 MW (C) 6.5 MW (D) 8.5 MW

Last Answer : A

Description : The most inefficient method of voltage reduction, from the standpoint of power loss, even when placed in series with the load, is the use of a/an ____________. A. capacitor B. inductor C. resistor D. transistor

Last Answer : Answer: C

Description : The most inefficient method of voltage reduction from the stand point of power loss, is a/an _____________. A. capacitor in series with the load B. inductor in series with the load C. capacitor and inductor in series with the load D. resistor in series with the load

Last Answer : Answer: D

Description : Mark the correct option a) The Inspector should maintain a register of lines and stages in respect of his sub division in form M-40 b) Entries should be made in the register in alphabetical ... in accordance with correction memos issued by the Superinendent from time to time. d) All the above

Last Answer : d) All the above

Description : If a voltage-controlled bus is treated as load bus, then which one of the following limits would be violated?   (a) Active power (b) Reactive power (c) Voltage (d) Phase angle 

Last Answer : If a voltage-controlled bus is treated as load bus, then which one of the following limits would be violated?   (a) Active power (b) Reactive power (c) Voltage (d) Phase angle 

Description : In load flow Study, a PV bus is treated as a PQ bus when

Last Answer : Voltage at the bus becomes high 

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).

Last Answer : Load factor is the Ratio of average demand to maximum demand. 

Description : The load duration curve for unity load factor will be of  (1) Rectangular shape (2) Triangular shape (3) L -shape (4) I -shape

Last Answer : The load duration curve for unity load factor will be of Rectangular shape

Description : The sequence components of current of a single-phase load connected to a 3-phase system are (A) equal positive and negative sequence components (B) equal positive, negative and zero sequence components (C) vector sum of sequence currents is zero (D) algebraic sum of sequence currents is zero

Last Answer : The sequence components of current of a single-phase load connected to a 3-phase system are equal positive, negative and zero sequence components

Description : In load flow analysis, the load connected at a bus is represented as?

Last Answer : constant real and reactive powers drawn from bus

Description : A 60 Hz, 320 km lossless line has Bending end voltage 1.0 p.u, The receiving end voltage on no load is?

Last Answer : A 60 Hz, 320 km lossless line has Bending end voltage 1.0 p.u, The receiving end voltage on no load is 1.088 p.u.

Description : A consumer consumes. 600 kWh per day at a load factor of 0.40. If the consumer increases the load factor of 0.70 without increasing the maximum demand, what is the consumption of energy in kWh?

Last Answer : A consumer consume. 600 kWh per day at a load factor of 0.40. If the coneumer increases the load factor of 0.70 without increasing the maximum demand, 1050 kWh is the consumption of energy in kWh.

Description : What is the maximum value of a load which consume 500 KWh per day at a load factor of 0.40, if the consumer increases the load factor of 0.50 without increasing the maximum demand?

Last Answer : 52.08 kW is the maximum value of a load which consume 500 KWh per day at a load factor of 0.40, if the consumer increases the load factor of 0.50 without increasing the maximum demand.