Economics of Power Generation MCQ

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• public sector undertaking is associated with erection and sometimes running of thermal power plants
  ক

  NTPC

  খ

  SAIL

  গ

  BEL

  ঘ

  BHEL
• Generating capacity connected to the bus bars and ready to take load when switched on is known as
  ক

  firm power

  খ

  cold reserve

  গ

  hot reserve

  ঘ

  spinning reserve
• Load factor of a power station is defined as
  ক

  $$\frac{{{\text{Maximum demand}}}}{{{\text{Average load}}}}$$

  খ

  $${\text{Average load}} \times {\text{Maximum demand}}$$

  গ

  $$\frac{{{\text{Average load}}}}{{{\text{Maximum demand}}}}$$

  ঘ

  $${\left( {{\text{Average load}} \times {\text{Maximum demand}}} \right)^{\frac{1}{2}}}$$
• The load factor of domestic load is usually
  ক

  10 to 15%

  খ

  30 to 40%

  গ

  50 to 60%

  ঘ

  60 to 70%
• Load factor of a power station is generally
  ক

  equal to unity

  খ

  less than unity

  গ

  more than unity

  ঘ

  equal to zero Diversity factor is always
• In which?of the following power plants the maintenance cost is usually high?
  ক

  Nuclear power plant

  খ

  Hydro-electric power plants

  গ

  Thermal power plants

  ঘ

  Diesel engine power plants
• A consumer has to pay lesser fixed charges in
  ক

  flat rate tariff

  খ

  two part tariff

  গ

  maximum demand tariff

  ঘ

  any of the above
• Low power factor is usually not due to
  ক

  Arc lamps

  খ

  Induction motors

  গ

  Fluorescent tubes

  ঘ

  Incandescent lamp
• Incase of ______ fuel transportation is the major problem.
  ক

  diesel power plants

  খ

  nuclear power plants

  গ

  hydro-electric power plants

  ঘ

  thermal power plants
• With reference to a power station which of the following is not a fixed cost?
  ক

  Fuel cost

  খ

  Interest on capital

  গ

  Insurance charges

  ঘ

  Depreciation
• Which of the following, in a thermal power plant, is not a fixed cost?
  ক

  Fuel cost

  খ

  Interest on capital

  গ

  Depreciation

  ঘ

  Insurance charges
• For which of the following power plants highly skilled engineers are required for running the plants?
  ক

  Nuclear power plants

  খ

  Gas turbine power plants

  গ

  Solar power plants

  ঘ

  Hydro-electric power plants
• For the same cylinder dimensions and speed, which of the following engine will produce least power?
  ক

  Supercharged engine

  খ

  Diesel engine

  গ

  Petrol engine

  ঘ

  All of the above engines will equal power
• Static capacitors are rated in terms of
  ক

  kW

  খ

  kWh

  গ

  kVAR

  ঘ

  none of the above
• The connected load of a IVMIM uir consumer is around
  ক

  5 kW

  খ

  40 kV

  গ

  80 kW

  ঘ

  120 kW
• The area under a load curve gives
  ক

  average demand

  খ

  energy consumed

  গ

  maximum demand

  ঘ

  none of the above
• Which of the following is not a method for estimating depreciation charges?
  ক

  Sinking fund method

  খ

  Straight line method

  গ

  Diminishing value method

  ঘ

  Halsey
• A low utilization factor for a plant indicates that
  ক

  plant is used for stand by purpose only

  খ

  plant is under maintenance

  গ

  plant is used for base load only

  ঘ

  plant is used for peak load as well as base load
• In a power plant if the maximum demand on the plant is equal to the plant capacity, then
  ক

  Plant reserve capacity will be zero

  খ

  Diversity factor will be unity

  গ

  Load factor will be unity

  ঘ

  Load factor will be nearly 60%
• Which of the following is not necessarily an advantage of interconnecting various power stations?
  ক

  Improved frequency of power supplied

  খ

  Reduction in total installed capacity

  গ

  Increased reliability

  ঘ

  Economy in operation of plants
• Annual depreciation cost is calculated by
  ক

  sinkingfund method

  খ

  straight line method

  গ

  both (A) and (B)

  ঘ

  none of the above
• In Hopknison demand rate or two parttariff the demand rate or fixed charges are
  ক

  dependent upon the energy consumed

  খ

  dependent upon the maximum demand of the consumer

  গ

  both (A) and (B)

  ঘ

  neither (A) nor (B)
• By the use of which of the following power factor can be improved ?
  ক

  Phase advancers

  খ

  Synchronous compensators

  গ

  Static capacitors

  ঘ

  Any of the above
• Annual depreciation as per straight line method, is calculated by
  ক

  the capital cost divided by number of year of life

  খ

  the capital cost minus the salvage value, is divided by the number of years of life

  গ

  increasing a uniform sum of money per annum at stipulated rate of interest

  ঘ

  none of the above
• High load factor indicates
  ক

  cost of generation per unit power is increased

  খ

  total plant capacity is utilised for most of the time

  গ

  total plant capacity is not properly utilised for most of the time

  ঘ

  none of the above
• Which of the following is the disadvantage due to low power factor ?
  ক

  Poor voltage regulation

  খ

  Increased transmission losses

  গ

  High cost of equipment for a given load

  ঘ

  All of the above
• Which of the following devices may be used to provide protection against lightening over voltages ?
  ক

  Horn gaps

  খ

  Rod gaps

  গ

  Surge absorbers

  ঘ

  All of the above
• power plant cannot have single unit of 100 MW.
  ক

  Hydroelectric

  খ

  Nuclear

  গ

  Steam

  ঘ

  Diesel

  ঙ

  Any of the above
• In India production and distribution of electrical energy is confined to
  ক

  private sector

  খ

  public sector

  গ

  government sectors

  ঘ

  joint sector

  ঙ

  none of the above
• An over excited synchronous motor on noload is known as
  ক

  synchronous condenser

  খ

  generator

  গ

  induction motor

  ঘ

  alternator