Power System MCQ

Test your knowledge with important Power System MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Power System MCQs at Bissoy

• Which of the following pollutants emitted by thermal power plant causes irritation in Eyes?
  ক

  Oxides of sulphur

  খ

  Oxides of Nitrogen

  গ

  Oxides of Mercury

  ঘ

  Oxides of carbon
• Which of the following is an essential requirement for a peak load plant?
  ক

  Economical and speedy repair

  খ

  Capability of working continuously

  গ

  Low operating cost

  ঘ

  Capability of quick start
• Which of the following power plants can be profitably employed for supplying base loads as well as peak loads?
  ক

  Diesel power plant

  খ

  Hydroelectric power plant

  গ

  Thermal power plant

  ঘ

  Nuclear power plant
• Which component of gas turbine power plant is main cause of its low efficiency?
  ক

  Compressor

  খ

  Starting motor

  গ

  Gas turbine

  ঘ

  Combustion chamber
• When the ozone gas is produced as a by product of corona, that causes _______
  ক

  increase of power factor

  খ

  corrosion of wires

  গ

  improvement of regulation

  ঘ

  reduction of power factor
• What of the below mentioned statements are incorrect as compared to the HVDC system?
  ক

  Distance limitation

  খ

  Back to back connection is possible

  গ

  Extra reactive power compensation

  ঘ

  More corona losses
• Which of the following pollutant causes acid rain?
  ক

  NO2

  খ

  SO2

  গ

  CO2

  ঘ

  NO
• Which of the following method is used in large modern thermal power plants to heat feed water?
  ক

  Open type heatre is used

  খ

  Surface type heater is used

  গ

  Close type heater is used

  ঘ

  Steam is directly taken from main turbine and used to heat it feed water
• Which of the following is most advantageous and most widely method of solid fuel firing?
  ক

  Spreader stoker firing

  খ

  Pulverised fuel firing

  গ

  Underfeed firing

  ঘ

  Stoker firing
• Which of the following is most suitable fuel for thermal power plant?
  ক

  Bituminous coal

  খ

  Lignite coal

  গ

  Anthracite coal

  ঘ

  Peat coal
• Which of the following are the most widely used condensers in modern thermal power plants?
  ক

  Low level counter flow type jet condenser

  খ

  Parallel flow type jet condenser

  গ

  High level counter flow type jet condenser

  ঘ

  Surface condensers
• Which of the following part of thermal power plant causes maximum energy losses?
  ক

  Alternator

  খ

  Ash and unburnt carbon

  গ

  Boiler

  ঘ

  Condenser
• Which of the following element of hydroelectric power plant prevents the penstock from water hammer phenomenon?
  ক

  Surge Tank

  খ

  Draft tubes

  গ

  Spillway

  ঘ

  Valves and Gates
• Which of the following is not an advantage of hydroelectric power plant?
  ক

  no fuel requirement

  খ

  continuous power source

  গ

  low running cost

  ঘ

  no standby losses
• Which of the following is not a requirement for site selection of hydroelectric power plant?
  ক

  Large catchment area

  খ

  Rocky land

  গ

  Sedimentation

  ঘ

  Availability of water
• Which of the following is not neglected during formation of reactance diagram from impedance diagram?
  ক

  Shunt component of Transformers

  খ

  Static loads

  গ

  Resistance of various power system components

  ঘ

  Reactance of alternators
• Voltage regulation in the power system is __________
  ক

  dip in voltage at sending end

  খ

  rise in voltage at sending end

  গ

  rise in voltage at receiving end

  ঘ

  dip in voltage at receiving end
• If the power system network is at Vs∠δ and receiving end voltage is Vr∠0 consisting of the impedance of TL as (R+j5)Ω. For maximum power transfer to the load, the most appropriate value of resistance R should be __________
  ক

  1.732

  খ

  3.45

  গ

  5.2

  ঘ

  0.33
• If all the sequence voltages at the fault point in a power system are equal, then fault is __________
  ক

  LLG fault

  খ

  Line to Line fault

  গ

  Three phase to ground fault

  ঘ

  LG fault
• The area under the load curve represents ____________
  ক

  maximum demand

  খ

  load factor

  গ

  the average load on power system

  ঘ

  number of units generated
• A power system has a maximum load of 15 MW. Annual load factor is 50%. The reserve capacity of plant is _____ if the plant capacity factor is 40%.
  ক

  3.75 MW

  খ

  7.75 MW

  গ

  46.75 MW

  ঘ

  8.75 MW
• A protection system engineer is planning to provide the complete protection, he can achieve this by ___________
  ক

  a two phase fault relays and three earth fault relays

  খ

  a two phase fault relays and two earth fault relays

  গ

  two phase fault relays and three earth fault relays

  ঘ

  three phase fault relays and two earth fault relays
• The given graph is the depiction of ________ on a large power system network.
  ক

  Three phase motor getting short

  খ

  L-G fault

  গ

  Ratings of machines

  ঘ

  Any of the mentioned
• A 50 bus power system Ybus has 80% sparsity. The total number of transmission lines will be ___________
  ক

  225

  খ

  563

  গ

  345

  ঘ

  456
• A 200 bus power system has 160 PQ bus. For achieving a load flow solution by N-R in polar coordinates, the minimum number of simultaneous equation to be solved is ___________
  ক

  359

  খ

  334

  গ

  357

  ঘ

  345
• For a given power system, its zero and maximum regulation will occur at the impedance angle of
  ক

  45

  খ

  60

  গ

  35

  ঘ

  50
• In combined operation of several power plants the reserve capacity requirement is reduced.
  ক

  False

  খ

  True
• In impedance diagram different power system elements are represented by symbols.
  ক

  False

  খ

  True
• Single line diagram does not represents:
  ক

  Ratings of machines

  খ

  Neutral wire of transmission lines

  গ

  Delta connection of transformer winding

  ঘ

  Star connection of transformer winding
• A power system will have greater flexibility of operation if they have __________
  ক

  Only Base load plants operating in combination

  খ

  Various types of power plants operating in combination

  গ

  Only Peak load plants operating in combination

  ঘ

  Only thermal power plants operating in combination