Power Plant Engineering In EE MCQ

Test your knowledge with important Power Plant Engineering In EE MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Power Plant Engineering In EE MCQs on Bissoy. Bissoy App

• Rankine cycle efficiency of a good steam power plant may be in the range of
  ক

  15 to 20 per cent

  খ

  35 to 45 per cent

  গ

  70 to 80 per cent

  ঘ

  90 to 95 per ceut
• The isentropic expansion of steam through nozzle for the steam initially dry saturated at inlet is approximated by equation.
  ক

  pv = C

  খ

  pv1A = C

  গ

  pv1i = C

  ঘ

  pv
• Underfeed stokers work best for __________ coals high in volatile matter and with caking tendency
  ক

  Anthracite

  খ

  Lignite

  গ

  Semi-bituminous and bituminous

  ঘ

  All of the above
• Reheat cycle in steam power plant is used to
  ক

  utilise heat of flue gases

  খ

  increase thermal efficiency

  গ

  improve condenser performance

  ঘ

  reduce loss of heat
• Blowing down of boiler water is the process
  ক

  to reduce the boiler pressure

  খ

  to increase the steam temperature

  গ

  to control the solid concentration in the boiler water by removing some of the concentrated saline water

  ঘ

  none of the above
• In a regenerative surface condenser
  ক

  There is one pump to remove air and condensate

  খ

  There are two pumps to remove air and condensate

  গ

  There are three pumps to remove air, vapor and condensate

  ঘ

  There is no pump; the condensate gets removed by gravity
• The draught produced, for a given height of the chimney and given mean temperature of chimney gases
  ক

  decreases with increase in outside air temperature

  খ

  increases with increase in outside air temperature

  গ

  remains the same irrespective of outside air temperature

  ঘ

  may increase or decrease with increase in outside air temperature
• For the safety of a steam boiler the number of safety valves fitted are
  ক

  four

  খ

  three

  গ

  two

  ঘ

  one
• In a regenerative feed heating cycle, the optimum value of the fraction of steam extracted for feed heating
  ক

  Decreases with increase in Rankine cycle efficiency

  খ

  Increases with increase in Rankine cycle efficiency

  গ

  Is unaffected by increase in Rankine cycle efficiency

  ঘ

  None of the above
• In India largest thermal power station is located at
  ক

  Kota

  খ

  Sarni

  গ

  Chandrapur

  ঘ

  Neyveli
• For the induced draught the fan is located
  ক

  near bottom of chimney

  খ

  near bottom of furnace

  গ

  at the top of the chimney

  ঘ

  anywhere permissible
• Carnot cycle comprises of
  ক

  two isentropic processes and two constant volume processes

  খ

  two isentropic processes and two constant pressure processes

  গ

  two isothermal processes and three constant pressure processes

  ঘ

  none of the above
• The effect of considering friction in steam nozzles for the same pressure ratio leads to
  ক

  increase in dryness fraction of exit steam

  খ

  decrease in dryness fraction of exit steam

  গ

  no change in the quality of exit steam

  ঘ

  decrease or increase of dryness fraction of exit steam depending upon inlet quality
• The effect of considering friction losses in steam nozzle for the same pressure ratio leads to
  ক

  increase in exit velocity from the nozzle

  খ

  decrease in exit velocity from the nozzle

  গ

  no change in exit velocity from the nozzle

  ঘ

  increase or decrease depending upon the exit quality of steam
• Method which is commonly applied for unloading the coal for small power plant is
  ক

  lift trucks

  খ

  coal accelerators

  গ

  tower cranes

  ঘ

  belt conveyor
• The pressure at the furnace is minimum in case of
  ক

  forced draught system

  খ

  induced draught system

  গ

  balanced draught system

  ঘ

  natural draught system
• Steam pressure in a steam power station, which is usually kept now-a-days is of the order of
  ক

  20 kgf/cm²

  খ

  50 kgf/cm²

  গ

  80 kgf/cm²

  ঘ

  100 kgf/cm²
• In coal preparation plant, magnetic separators are used to remove
  ক

  Dust

  খ

  Clinkers

  গ

  Iron particles

  ঘ

  Sand
• Example of overfeed type stoker is
  ক

  chain grate

  খ

  spreader

  গ

  travelling grate

  ঘ

  all of the above
• The draught produced by steel chimney as compared to that produced by brick chimney for the same height is
  ক

  Less

  খ

  More

  গ

  Same

  ঘ

  May be more or less
• Secondary air is the air used to
  ক

  reduce the flame length

  খ

  increase the flame length

  গ

  transport and dry the coal

  ঘ

  provide air round the burners for getting optimum combustion
• The value of the reheat factor is of the order of
  ক

  0.8 to 1.0

  খ

  1.0 to 1.05

  গ

  1.1 to 1.5

  ঘ

  above 1.5
• Binary vapor cycles are used to
  ক

  Increase the performance of the condenser

  খ

  Increase the efficiency of the plant

  গ

  Increase efficiency of the turbine

  ঘ

  None of the above
• Parson's turbine is
  ক

  pressure compounded steam turbine

  খ

  simple single wheel, impulse steam turbine

  গ

  simple single wheel reaction steam turbine

  ঘ

  multi wheel reaction steam turbine
• The isentropic expansion of steam through nozzle for the steam initially superheated at inlet is approximated by equation
  ক

  pvls=C

  খ

  pv1126 = C

  গ

  pv1A = C

  ঘ

  pv = C
• The commercial sources of energy are
  ক

  solar, wind and biomass

  খ

  fossil fuels, hydropower and nuclear energy

  গ

  wood, animal wastes and agriculture wastes

  ঘ

  none of the above
• For the same draught produced the power of induced draught fan as compared to forced draught fan is
  ক

  less

  খ

  more

  গ

  same

  ঘ

  not predictable
• In a steam power plant, the function of a condenser is
  ক

  to maintain pressure below atmospheric to increase work output from the primemover

  খ

  to receive large volumes of steam exhausted from steam prime mover

  গ

  to condense large volumes of steam to water which may be used again in boiler

  ঘ

  all of the above
• For forced draught system, the function of chimney is mainly
  ক

  to produce draught to accelerate the combustion of fuel

  খ

  to discharge gases high up in the atmosphere to avoid hazard

  গ

  to reduce the temperature of the hot gases discharged

  ঘ

  none of the above
• In fuel cell, the ______ energy is converted into electrical energy.
  ক

  mechanical

  খ

  chemical

  গ

  heat

  ঘ

  sound