Span: Span means the horizontal distance between two adjacent supporting points of an overhead conductor. As per Indian Electricity rule in overhead systems, the recommended span of various support poles is given below. Important Points.
Additional Information. The maximum demand of the station is MW. The ratio of the sum of individual maximum demands to the maximum demand on the power station is known as a diversity factor.
A power station supplies load to various types of consumers whose maximum demands generally do not occur at the same time. Therefore, the maximum demand for the power station is always less than the sum of the individual maximum demands of the consumer.
Hence diversity factor is always greater than 1. The knowledge of the diversity factor is vital in determining the capacity of the plant equipment. The greater the diversity factor , the lesser is the cost of generation of power.
Because greater diversity factor means lesser maximum demand. Now, lower maximum demand means a lower capacity of the plant which reduces the cost of the plant. It may be defined as the voltages that appears across the breaking contact at the instant of arc extinction. The correct answer is the Conversion of gravitational potential energy into electrical energy.
Key Points. The average life span of a hydro power plant is somewhere from 60 to years. They will increase the transmission capacity and the stability of the line. These are also used to share the load between parallel lines. Series reactors are used as current limiting reactors to increase the impedance of a system. They are also used to limit the starting currents of synchronous electric motors and to compensate for reactive power in order to improve the transmission capacity of power lines.
A shunt reactor is an absorber of reactive power, thus increasing the energy efficiency of the system. The power-transfer capability of EHV transmission lines can be increased by maintaining the loaded voltage within specified limits. A synchronous condenser is not a static compensation. A synchronous condenser is a synchronous motor running at no load and taking leading current.
A synchronous condense r is an overexcited synchronous motor, which draws leading currents from the system and hence compensates for lagging vars.
It is used as a reactive power compensator in some systems for power factor correction purposes. Whenever an inductive load is connected to the transmission line, power factor lags because of lagging load current. To compensate this, a shunt capacitor is connected which draws current leading the source voltage. The power factor can be improved. Series capacitors are used to compensate for the inductance of the transmission line.
They are also used to limit the starting currents of synchronous electric motors and to compensate reactive power in order to improve the transmission capacity of power lines. Start Learning. Answer Detailed Solution Below Option 2 : reduce the speed of neutrons. It works on the principle of controlled chain reaction and provides energy at a constant rate.
The material of the moderator should be light and it should not absorb neutrons. Answer : Low head up to 60 meters. Medium head from 60 meters to meters. High head above meters. Answer : It provides power generation, irrigation, fishery and flood control at the same time. How Is Water Turbines Mounted?
Answer : The impulse turbine is mounted horizontally whereas the reaction turbine is mounted vertically. Popular Interview Questions. All Interview Questions. All Practice Tests. IT Skills. Management Skills. Communication Skills. Business Skills. Digital Marketing Skills. Human Resources Skills. Health Care Skills.
Finance Skills. All Courses. A Hydrograph provides the following information: The discharge at any time during the period under consideration. The maximum and minimum runoff during the period. The average run-off during the period. Total volume of the discharge up to any time, given by the area under the curve up to that time.
Power Electronics Tutorial Question 5. Power Electronics Interview Questions Question 6. Answer : Water. Answer : The following factors are to be considered for selecting the site of a hydro-electric power plant:- Since potential energy of water fall or kinetic energy of flowing stream is utilized in the hydro-electric power plant, therefore water must be available in sufficient quantity at a good head or huge quantity of water is flowing across a given point. The site must be convenient for the creation of the dam and must have topographical suitability for the erection of reservoir.
The rivers feeding the reservoir must have a large catchment area. The land must be rocky in order to withstand the heavy weight of large building of the dam. The site should be accessible and habitable.
Email- nageshgowda gmail. Please send all mcq of Electrical Engineering with solution my email bjp gmail. Hi, I want all questions related to electrical engineering so that i can prepare better for my upcoming tests. It will be very helpful for me if you can send me these questions. I want question and answer about thermal and gas power plant.
Your email address will not be published. The commercial sources of energy are a solar, wind and biomass b fossil fuels, hydropower and nuclear energy c wood, animal wastes and agriculture wastes d none of the above Ans: b 2. The proper indication of incomplete combustion is a high CO content in flue gases at exit b high CO2 content in flue gases at exit c high temperature of flue gases d the smoking exhaust from chimney Ans: a 7.
The main source of production of biogas is a human waste b wet cow dung c wet livestock waste d all above Ans: d 8.
Solar thermal power generation can be achieved by a using focusing collector or heliostates b using flat plate collectors c using a solar pond d any of the above system Ans: d Thorium Breeder Reactors are most suitable for India because a these develop more power b its technology is simple c abundance of thorium deposits are available in India d these can be easily designed Ans: c The overall efficiency of thermal power plant is equal to a Rankine cycle efficiency b Carnot cycle efficiency c Regenerative cycle efficiency d Boiler efficiency x turbine efficiency x generator efficiency Ans: c Rankine cycle efficiency of a good steam power plant may be in the range of a 15 to 20 per cent 6 35 to 45 per cent c 70 to 80 per cent d 90 to 95 per ceut Ans: b Rankine efficiency of a steam power plant a improves in summer as compared to that in winter 6 improves in winter as compared to that in summer c is unaffected by climatic conditions d none of the above Ans: b Carnot cycle comprises of a two isentropic processes and two constant volume processes b two isentropic processes and two constant pressure processes e two isothermal processes and three constant pressure processes d none of the above Ans: b In Rankine cycle the work output from the turbine is given by a change of internal energy between inlet and outlet b change of enthaply between inlet and outlet c change of entropy between inlet and outlet d change of temperature between inlet and outlet Ans: b Regenerative cycle thermal efficiency a is always greater than simple Rankine thermal efficiency b is greater than simple Rankine cycle thermal efficiency only when steam is bled at particular pressure c is same as simple Rankine cycle thermal efficiency d is always less than simple Rankine cycle thermal efficiency Ans: a In a regenerative feed heating cycle, the optimum value of the fraction of steam extracted for feed heating a decreases with increase in Rankine cycle efficiency b increases with increase in Rankine cycle efficiency c is unaffected by increase in Rankine cycle efficiency d none of the above Ans: b In a regenerative feed heating cycle, the greatest economy is affected a when steam is extracted from only one suitable point of steam turbine b when steam is extracted from several places in different stages of steam turbine c when steam is extracted only from the last stage of steam turbine d when steam is extracted only from the first stage of steam turbine Ans: b The maximum percentage gain in Regenerative feed heating cycle thermal efficiency a increases with number of feed heaters increasing b decreases with number of feed heaters increasing c remains same unaffected by number of feed heaters d none of the above Ans: a In regenerative cycle feed water is heated by a exhaust gases b heaters c draining steam from the turbine d all above Ans: c Reheat cycle in steam power plant is used to a utilise heat of flue gases b increase thermal efficiency c improve condenser performance d reduce loss of heat Ans: b Mercury is a choice with steam in binary vapour cycle because it has a higher critical temperature and pressure b higher saturation temperature than other fluids c relatively low vapourisation pressure d all above Ans: d A steam power station requires space a equal to diesel power station b more than diesel power station c less than diesel power station Ans: b Economiser is used to heat a air b feed water c flue gases d all above Ans: b The modern steam turbines are a impulse turbines b reaction turbines c impulse-reaction turbines d none of the above Ans: c The draught which a chimney produces is called a induced draught b natural draught c forced draught d balanced draught Ans: b The draught produced by steel chimney as compared to that produced by brick chimney for the same height is a less b more c same d may be more or less Ans: b In a boiler installation the natural draught is produced a due to the fact that furnace gases being light go through the chimney giving place to cold air from outside to rush in b due to the fact that pressure at the grate due to cold column is higher than the pressure at the chimney base due to hot column c due to the fact that at the chimney top the pressure is more than its environmental pressure d all of the above Ans: b The draught produced, for a given height of the chimney and given mean temperature of chimney gases a decreases with increase in outside air temperature b increases with increase in outside air temperature c remains the same irrespective of outside air temperature d may increase or decrease with increase in outside air temperature Ans: a The draught produced by chimney of given height at given outside temperature a decreases if the chimney gas temperature increases b increases if the chimney gas temperature increases c remains same irrespective of chimney gas temperature d may increase or decrease Ans: b For forced draught system, the function of chimney is mainly a to produce draught to accelerate the combustion of fuel b to discharge gases high up in the atmosphere to avoid hazard c to reduce the temperature of the hot gases discharged d none of the above Ans: b Artificial draught is produced by a induced fan b forced fan c induced and forced fan d all of the above Ans: d The draught in locomotive boilers is produced by a forced fan b chimney c steam jet d only motion of locomotive Ans: c For the same draught produced the power of induced draught fan as compared to forced draught fan is a less b more c same d not predictable Ans: b Artificial draught is produced by a air fans b steam jet c fan or steam jet d all of the above Ans: d The artificial draught normally is designed to produce a less smoke b more draught c less chimney gas temperature d all of the above Ans: d For the induced draught the fan is located a near bottom of chimney b near bottom of furnace c at the top of the chimney D anywhere permissible Ans: a The pressure at the furnace is minimum in case of a forced draught system b induced draught system c balanced draught system d natural draught system Ans: c Please enter your name here.
You have entered an incorrect email address! Government Scheme. General Awareness. Government Adda - January 26, 0. Padma Awards Complete list of Padma awardees. One of the highest Civilian Awards of the country, Padma Awards were recently conferred in three different August 24, December 10, Banking Awareness.
December 14, November 26, All Right Reserved. Government Adda - May 14, 0. Capacity MW. Vindhyachal Thermal Power Station Singrauli, Madhya Pradesh. Mundra Thermal Power Station May Mundra, Kutch district, Gujarat. Adani Power. Sasan, Singrauli, Madhya Pradesh. Sasan Power, a subsidiary of Reliance Power. Tamnar, Raigarh district, Chhattisgarh.
Urjanagar, Chandrapur district, Maharashtra. Tiroda Thermal Power Station Sept Tirora, Gondia district, Maharashtra. Angul district, Odisha. Sipat, Bilaspur district, Chhattisgarh. Ramagundam Peddapalli district, Telangana. Jamnipali, Korba district, Chhattisgarh. Rihand Thermal Power Station. Renukut, Sonbhadra district, Uttar Pradesh. Sterlite Jharsuguda Power Station Aug Jharsuguda, Jharsuguda district, Odisha.
Sterlite Energy, a subsidiary of Vedanta Resources. Kahalgaon, Bhagalpur district, Bihar. Mouda, Nagpur district, Maharashtra. Nabarun Murshidabad district, West Bengal.
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