Solar Energy MCQ

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

• Organic vapours are used small plants and low powered solar thermo-mechanical systems.
  ক

  True

  খ

  False
• What is the minimum vapour pressure (in kP
  ক

  of the working fluid to drive a turbine? ] 300

  খ

  700

  গ

  100

  ঘ

  50
• Which of the following affects the installation of a solar thermo-mechanical system?
  ক

  Availability of land

  খ

  Availability of photovoltaics

  গ

  Availability of sunlight and clouds

  ঘ

  Availability of rain
• What is the bare minimum requirement for the construction materials used in solar thermo-mechanical systems?
  ক

  Contaminate the working fluid

  খ

  Withstand heat from the working fluid

  গ

  Withstand pressure from the working fluid

  ঘ

  Withstand both, heat and pressure from working fluid
• The practical heat engine _______ theoretical efficiency.
  ক

  has greater efficiency than

  খ

  has the same efficiency as that of

  গ

  has lesser efficiency as compared to the

  ঘ

  always has minimum efficiency equal to that of
• What is the main problem in a solar thermo-mechanical system as the collection (operating) temperature increases?
  ক

  Efficiency of collection system and engine decreases

  খ

  Efficiency of collection system decreases but engine efficiency increases

  গ

  Efficiency of collection system and engine increases

  ঘ

  Efficiency of collection system increases and engine efficiency decreases
• The choice of working fluid depends on the operating temperatures in the boiler.
  ক

  True

  খ

  False
• Which of the following governs the efficiency of any practical solar thermo-mechanical system?
  ক

  Photovoltaics

  খ

  Rankine Cycle

  গ

  Brayton Cycle

  ঘ

  Properties of working fluid
• Which of the following best describes Brayton Cycle?
  ক

  Exhaust gas → hot compressed gas → expands through turbine by doing work → heat exchanger → rejection of heat → gas goes to compressor

  খ

  Exhaust gas → hot compressed gas → expands through turbine by doing work → heat exchanger → gas goes to compressor → rejection of heat

  গ

  Hot compressed gas →expands through turbine by doing work → exhaust gas → heat exchanger → rejection of heat → gas goes to compressor

  ঘ

  Heat exchanger → exhaust gas → hot compressed gas → expands through turbine by doing work → gas goes to compressor → rejection of heat
• In Stirling cycle, the heat addition and rejection take place at _________
  ক

  constant pressure

  খ

  constant temperature

  গ

  two different temperatures

  ঘ

  multiple pressures
• How does Stirling cycle differ from Carnot cycle?
  ক

  The two adiabatic steps in Carnot cycle are replaced by two constant volume steps

  খ

  The two adiabatic steps in Carnot cycle are replaced by two constant temperature steps

  গ

  The two isothermal steps in Carnot cycle are replaced by two constant volume steps

  ঘ

  The two isobaric steps in Carnot cycle are replaced by two constant volume steps
• How can the efficiency of Rankine cycle be improved?
  ক

  By supplying heat at higher temperatures

  খ

  By supplying heat at lower temperatures

  গ

  By rejecting more heat

  ঘ

  By using a part of rejected heat
• Why is the efficiency of Rankine cycle less than that of Carnot cycle?
  ক

  Because of the working fluid

  খ

  Because of the turbines

  গ

  Because all the heat is not supplied at upper temperatures

  ঘ

  Because all the heat is supplied at upper temperatures
• Which of the following best describes the process of an ideal Rankine cycle?
  ক

  Working fluid is heated in boiler → exhaust vapour is condensed → vapour runs the turbine → liquid residue is pumped back into boiler

  খ

  Working fluid is heated in boiler → vapour runs the turbine → exhaust vapour is condensed → liquid residue is pumped back into boiler

  গ

  Vapour runs the turbine → working fluid is heated in boiler → exhaust vapour is condensed → liquid residue is pumped back into boiler

  ঘ

  Exhaust vapour is condensed → Working fluid is heated in boiler → vapour runs the turbine → liquid residue is pumped back into boiler
• How does an ideal Rankine cycle work?
  ক

  Heat-addition process does not occur at constant temperature

  খ

  Heat-addition process occurs at temperature

  গ

  Heat-addition process does not occur at constant pressure

  ঘ

  Heat-addition process occurs at constant pressure
• Isothermal process is a process conducted at constant temperature.
  ক

  True

  খ

  False
• Heat engine efficiency increases with ________ sink temperature.
  ক

  no change in

  খ

  decrease in

  গ

  increment in rate of increasing

  ঘ

  increase in
• Distributed power system is a type of solar thermo-mechanical system.
  ক

  True

  খ

  False
• Heat engine efficiency increases as the source temperature _______
  ক

  decreases

  খ

  remains the same

  গ

  decrement rate increases

  ঘ

  increases
• What is Carnot efficiency?
  ক

  Rate of the temperature difference divided by rate of initial temperature change

  খ

  Ratio of relative temperature between source and sink and the relative source temperature

  গ

  Ratio of absolute temperature between source and sink and the absolute source temperature

  ঘ

  Ratio of rate of the temperature difference and the absolute source temperature
• The type of heat engine depends on _______
  ক

  material of interconnecting pipes

  খ

  type of collector

  গ

  sunlight

  ঘ

  photovoltaics
• How is energy collected in a distributed power system?
  ক

  Sunlight → line focused collectors → interconnecting pipes → heat engines → turbines → electricity

  খ

  Line focused collectors → sunlight → interconnecting pipes → heat engines → turbines → electricity

  গ

  Sunlight → line focused collectors → turbines → interconnecting pipes → heat engines → electricity

  ঘ

  Interconnecting pipes → sunlight → line focused collectors → heat engines → turbines → electricity
• Which of the following is a line focus collector used in a distributed power system?
  ক

  Parabolic mirrors

  খ

  Convex mirrors

  গ

  Concave lenses

  ঘ

  Linear fresnel reflector
• What is the operating temperature of turbines in a central receiver thermal power system? Note that “C” stands for Celsius.
  ক

  10 – 100 degree C

  খ

  5000 degree C

  গ

  500 – 800 degree C

  ঘ

  200 – 500 degree C
• Which of the following best describes the working of central receiver thermal power system?
  ক

  Sunlight → heliostats absorb solar flux → central receiver → turbine system → electricity

  খ

  Sunlight → heliostats reflect solar flux → central receiver → turbine system → electricity

  গ

  Heliostats reflect solar flux → sunlight → turbine system → central receiver → electricity

  ঘ

  Heliostats reflect solar flux → sunlight → central receiver → turbine system → electricity
• Which of the following is a popular solar thermal power system?
  ক

  Central receiver thermal electric power system

  খ

  Photovoltaics

  গ

  Concentrating mirrors

  ঘ

  Solar reflectors
• Which of the following is/are examples of heat engines?
  ক

  Fuel cell vehicles

  খ

  Fuel cell energy power plants

  গ

  Photovoltaics and concentrating mirrors

  ঘ

  Rankine cycle and Brayton cycle
• How does heat engine convert thermal and chemical energy to mechanical energy?
  ক

  With the help of steam

  খ

  By converting the input energy into electrical energy which is then used to drive mechanical systems

  গ

  By bringing a working substance from a higher state temperature to a lower state temperature

  ঘ

  By converting the input electrical energy to mechanical energy
• What is a heat engine?
  ক

  System that converts thermal energy to mechanical energy

  খ

  System that converts thermal and chemical energy to mechanical energy

  গ

  System that converts mechanical energy to thermal energy

  ঘ

  System that converts mechanical energy to thermal and chemical energy
• Which of the following best describes the flow of energy in a solar thermo-mechanical system?
  ক

  Solar → thermal → mechanical → electricity

  খ

  Electricity → thermal → mechanical → solar

  গ

  Mechanical → solar → electricity → thermal

  ঘ

  Solar → electricity → thermal → mechanical