Solar Energy Questions and AnswersMarch 1, 2021 By admin This article lists 100 Solar Energy MCQs for engineering students. All the Solar Energy Questions & Answers given below includes solution and where possible link to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on Solar Energy topic which is core in Electronics & Electrical Engineering.In solar energy, the word solar denotes sun whereas energy means the energy of the sun. The sun is the ultimate source of energy for human beings which emits indirectly visible radiation light energy, infrared radiations, heat energy, and a very small amount of ultraviolet radiation. The infrared radiations and the visible radiations are collectively known as solar energy. The earth receives solar energy directly from the sunlight. We are getting solar energy using some scientific techniques. The solar panels or photovoltaic panels convert sunlight directly into electric current. The main disadvantage of solar panels is, at night time it doesn’t work and the cost of installation is very high. The main advantages of solar energy are reliability, predictability, uninterruptible, low maintenance, free of cost, no pollution, and performance is good. We can use solar energy directly to heat the water, lighting, cooking, passive heating, to charge the portable devices, attic ventilation, inverter and cooling. 1). The Zenith Angle complement is ________Surface Azimuth AngleSlopeSolar Altitude AngleSolar Azimuth AngleHintThe solar altitude angle is the zenith angle complement 2). Which Meter is used to measure the Beam Radiations ________PyrheliometerSunshine RecorderAnemometerAll of the aboveHintThe meter which is used to measure the beam radiations is a pyrheliometer. 3). How many types of solar cells?OneTwoThreeFourHintThey are mono silicon crystalline, polycrystalline silicon & amorphous silicon crystalline 4). In which collector the efficiency is maximum ________Flat PlateLine FocusingEvacuated TubeParaboloid DishHintIn paraboloid dish collector, the efficiency is maximum compared with other collectors 5). The solar cell efficiency is about ________25%15%48%63%HintThe efficiency of the solar cell is about 15% 6). The source of energy used for satellites is __________Solar CellsEdison CellsFuel CellsCryogenic CellsHintThe source of energy used for satellites is solar cells 7). The Pyranometer measures _________Direct RadiationDiffusion RadiationBoth a and bNone of the aboveHintThe pyranometer measures both direct and diffuse radiations 8). The single solar cell voltage is about _______0.2 V0.5 V1.0 V2.0 VHintThe single solar cell voltage is about 0.5 V 9). The solar heater function is to convert the solar energy in to ________RadiationElectrical EnergyThermal EnergyNone of the aboveHintThe function of the solar heater is to convert the solar energy into thermal energy 10). The solar heater life span is around _________4-5 years2-6 years1-2 years6-7 yearsHintThe payback period of solar water heater is up to 2-6 years 11). The radiation of solar includes ____________Ultraviolet light and Visible lightRadio waves and Infrared wavesX rays and Gamma raysAll of the aboveHintThe radiation of solar includes radio waves, infrared waves, x and gamma rays, ultraviolet light, and visible light. 12). Which cell is used to converts solar energy directly into electrical energy ________Dry cellPhotoelectric cellBatteryNone of the aboveHintThe PV cell is used to convert solar energy directly into an electrical energy 13). Which of the following is the most dangerous type of radiation ________Alpha radiationBeta radiationGamma radiationNone of the aboveHintAlpha radiation is the most dangerous type of radiation 14). The energy which is stored as latent heat is called as _______ energyMechanical energyElectrical energyThermal energyNone of the aboveHintThe energy which is stored as latent heat is called thermal energy 15). The solar energy directly used for ______DryingWater heatingDistillationAll of the aboveHintSolar energy directly used for drying, water heating, distillation 16). The nuclear radiation unit is ______PascalRankineReaumurRoentgenHintThe unit of nuclear radiation is roentgen 17). The standard form of HHW is __________High level wasteLow level wasteHigh and low level wasteNone of the aboveHintThe full form of HHW is High-Level Waste 18). _________ radiation is called as a diffuse radiationScattered solar radiationBeam radiationInfrared radiationNone of the aboveHintThe scattered solar radiation is also called a diffuse radiation 19). Which type of radiation reaches the surface without absorption or without scattering?Scattered solar radiationInfrared radiationBeam radiationNone of the aboveHintThe type of radiation that reaches the surface without absorbed or without scattering is beam radiation 20). From the sun the solar energy is radiated in the form of ___________ wavesElectromagnetic wavesInfrared wavesTransverse wavesNone of the aboveHintSolar energy is radiated in the form of electromagnetic waves 21). The less insolation occurs when the sun is ________At nightLow in the skyHigh in the skyNone of the aboveHintLow in the sky 22). In solar cells _________ material is usedCopperSilverSiliconNone of the aboveHintSilicon 23). The range of solar cell efficiency is5-10%10-15%15-20%None of the aboveHintThe range of solar cell efficiency is about 10-15% 24). In aircrafts _____________ batteries are usedAlkaline batteryAluminium-ion batteryNickel-iron batteryNone of the aboveHintThe batteries which are used in aircraft is nickel-iron batterySolar Energy Interview Questions 25). The sun emits ______________ radiationsInfraredVisibleSmall amount of ultravioletAll of the aboveHintAll of the above 26). Visible radiations gives ______________ energyLight energyHeat energyBoth a and bNone of the aboveHintThe visible radiations give light energy 27). Infrared radiations gives ______________ energyLight energyHeat energyBoth a and bNone of the aboveHintThe infrared radiations give heat energy 28). The Infrared radiations, visible radiations and small amount of ultraviolet radiations are collectively known as ______________ energyLight energyHeat energySolar energyNone of the aboveHintSolar energy 29). In how many ways we can harness solar energy?One-wayTwo waysThree waysFour waysHintIn two ways we can harness the solar energy they are direct way and indirect way 30). Plants convert solar energy into ____________ energyChemical energyLight energyHeat energyNone of the aboveHintThe plants convert solar energy into chemical energy 31). The solar constant also called as ____________Solar intensitySolar irradianceBoth a and bNone of the aboveHintThe solar constant is also called solar intensity 32). The formula of solar constant is ________S= (R/r).σT2S = (R/r)2. σT4S = (R/r2).ΣT2None of the aboveHintThe formula of solar constant is s=(R/r)2. σT4, where R is the radius of the sun, T is the temperature of the sun, and r is the average distance between the sun and earth. 33). The solar cell has __________One generationTwo generationsThree generationsFour generationsHintThe solar has three generations they are first, second and third generations. 34). What is the S.I unit of the solar constant?S.I unit= W2/m2S.I unit= Wm2S.I unit= W/m2None of the aboveHintThe S.I unit of the solar constant is W/m2 35). What is the solar constant value?S = 1.4*103 W/m2S = 1.4*102 W/m2S = 1.4*104 W/m2None of the aboveHintThe solar constant is 1.4*103 W/m2 36). The formula of the surface temperature of the sun is ________T= (R/r)2 (s/σ)T4= (R/r)2 (s/σ)T2= (R/r)2 (s/σ)None of the aboveHintThe formula of the surface temperature of the sun is T4= (R/r)2 (s/σ). Where T is the temperature of the sun, r is the average distance between the sun and earth, s is the solar constant, σ is the Stefans constant, and R is the radius of the sun. 37). What are the non-renewable energy sources of energy?Energy from wind, sunEnergy from flowing water, ocean wavesFossil fuels such as coal, petroleumBoth a and bHintFossil fuels such as coal and petroleum are the non-renewable sources of energy because these sources cannot be regenerated or we can say that the supply of these sources is limited 38). Solar energy can leads to generate the electricity through ______Heat enginesPhotovoltaicsHeat engines and PhotovoltaicsNone of the aboveHintSolar energy can leads to generate electricity through heat engines and photovoltaics. 39). The solar energy is essentially useful in _________ contextsSolar thermalSolar photovoltaicsSolar thermal and Solar photovoltaicsNone of the aboveHintSolar energy is essentially useful in two contexts they are solar thermal and solar photovoltaics 40). The high temperature in the concentrating solar technologies divided into how many parts?OneTwoThreeFourHintThe high temperature in the concentrating solar technologies divided into two parts they are central tower collectors, and parabolic dish collectors 41). Choose the odd one outCoalPetroleumOilBiomassHintBiomass is the renewable sources of energy and the remaining are the non-renewable sources of energy 42). What are the drawbacks of the solar cooker?Doesn’t work at nightSolar cooker takes more time to cook the foodBoth a and bNone of the aboveHintThe solar cooker is very easy to design but the drawback of the solar cooker is it doesn’t work at night times when there is no sunlight and it takes more time to cook the food. 43). How many layers do solar cells consist of?One layerTwo layersThree layersFour layersHintThe solar cell is made up of silicon and it consists of two layers they are silicon boron layer and the silicon arsenic layer 44). What are the advantages of the solar cells?Maintenance is very lowNo pollutionMaintenance is very highBoth a and bHintThere are many advantages of using solar cells over other sources of energy first is that they don’t cause any pollution and the maintenance is very low. 45). What are the drawbacks of using solar cells?Very expensiveEfficiency is lowWire which is used for connections is made up of silver materialAll of the aboveHintSome of the drawbacks of using solar cells are the efficiency is low, manufacturing is very expensive, and the wires which are used for connection is made up of silver 46). What is the importance of solar energy?Environmental friendlySaves your moneyLow Maintenance and diverse applicationsAll of the aboveHintSolar energy protects the environment, saves your money, and the maintenance cost of solar energy is very low or we can say that almost negligible 47). What are the different methods of solar energy utilizations?Direct methodIndirect methodBoth a and bNone of the aboveHintThere are two methods of solar energy utilizations they are the direct method and indirect method 48). The direct method of solar energy utilization can be classified into ______?Solar thermalSolar photovoltaicSolar thermal and solar photovoltaicNone of the aboveHintThe direct method of solar energy utilization can be classified into two they are solar thermal and solar photovoltaicRenewable Energy Questions and Answers 49). __________ comes under the indirect method of solar energy utilizationWater power, wind, wave energyMarine currents, OTECBiomassAll of the aboveHintThe water power, wind, wave energy, marine currents, OTEC, and biomass comes under the indirect method of solar energy utilization 50). The efficiency achieved from solar thermal energy is almost __________20-45%10-40%15-30%None of the aboveHintIn solar thermal energy, the efficiency range is between 20-45% 51). The medium temperature in the concentrating solar technologies divided into how many parts?OneTwoThreeFourHintThe medium temperature in the concentrating solar technologies divided into two parts they are parabolic trough collectors (PTC), and fresnel collectors 52). The thin bottom layer of the semiconductor in the solar cell is also called as _______P - typeN - typePNP - typeAll of the aboveHintThe thin bottom layer of the semiconductor in the solar cell is also called a positive type or P-type 53). The concentrating solar technologies divided into how many parts?OneTwoThreeFourHintThe concentrating solar technologies are divided into three parts they are low temperature, medium temperature, and high temperature. 54). The low temperature in the concentrating solar technologies divided into how many parts?OneTwoThreeFourHintThe low temperature in the concentrating solar technologies is divided into three parts they are flat plate collectors, solar chimney, and solar pond. 55). The efficiency achieved from photovoltaic is almost __________20-45%20-40%19-24%None of the aboveHintIn photovoltaic technology, the efficiency range is between 19-24% that is also for the single junction silicon (si). 56). The solar photovoltaics efficiency varies between ___________20-40%9-70%45-60%8-40%HintThe efficiency of solar photovoltaics varies between 8-40% 57). The total efficiency of the solar thermal power plant is divided into ________Receiver efficiencyGenerator efficiencyBoth a and bNone of the aboveHintThe total efficiency of the solar thermal power plant is divided into two parts they are sunlight to heat conversion process or maybe the receiver efficiency and the other one is heat to electricity conversion process or maybe the generator efficiency. 58). What are the layers which improve the receiver efficiency of solar thermal energy?Absorber layer coated tubeAnti-reflective layer coated tubeBoth a and bNone of the aboveHintThe anti-reflective layer coated tube and absorber layer coated tubes improve the efficiency of the receiver 59). The coating materials which are used in solar absorber should possess the _________ propertiesHigh absorptivity, low emissivityStrong adhesion, high durabilityHigh thermal conductivity, corrosion, and wear resistanceAll of the aboveHintThe solar absorber should possess the properties like high absorptivity, low emissivity, strong adhesion, high durability, high thermal conductivity, corrosion, and wear resistance 60). What is the source of solar energy?Nuclear fusionNuclear power plantCoalNone of the aboveHintNuclear fusion is the source of energy. Nuclear fusion means the two small hydrogen atoms used together to form helium. 61). How many parts does solar energy have?OneTwoThreeFourHintSolar energy has three major parts 62). The semiconductor is the part of the solar cell that has ___________Top layerBottom layerMiddle layerAll of the aboveHintThe semiconductor is the part of the solar cell that has three layers they are top, bottom, and middle layers. 63). The solar radiation range in the visible rays is about _______40-41%33-35%42-43%None of the aboveHintThe solar radiation range invisible rays is about 42-43% 64). The solar radiation range in infrared is about _______52-55%33-35%40-43%None of the aboveHintThe solar radiation range in infrared is about 52-53% 65). The solar radiation range in ultraviolet is about _______4-5%3-5%0-3%None of the aboveHintThe solar radiation range in ultraviolet is about 3-5% 66). How many types of solar cells are there based on the crystal structure?OneTwoThreeFourHintThe three types of solar cells are based on the crystal structure. 67). What are the parts of solar energy?VisibleInfraredUltravioletAll of the aboveHintThe three major parts of solar radiation or solar energy are the visible part, infrared part, and ultraviolet part. 68). What are the characteristics of the solar cells?Open-circuit voltage and short circuit currentFill factorPower conversion efficiencyAll of the aboveHintThe open-circuit voltage and short circuit current, fill factor, and power conversion efficiency are the characteristics of the solar cells 69). What is the most commonly used renewable energy?Solar energyTidal energyHydro energyNone of the aboveHintThe most commonly used renewable energy source is solar energy 70). What is the basic component of the PV system (Photovoltaic system)?BatteryCharge collectorSolar cellAll of the aboveHintThe basic component of the photovoltaic system is the solar cell 71). How much voltage does a single solar cell produce?1v0.5v0.01vNone of the aboveHintThe single solar cell has a capacity to produce 0.5 volts of electricity 72). The efficiency of the poly crystalline silicon solar cell is about __________14-17%12-17%13-15%None of the aboveHintThe efficiency of the polycrystalline silicon solar cell is about 13-15% which is less than the monocrystalline silicon solar cell 73). The semiconductor is the part of the solar cell that has ___________One layerTwo layersThree layersNone of the aboveHintThe semiconductor is the part of the solar cell that has three layers they are top, bottom, and middle layers. 74). The types of solar cells based on the crystal structure are _________Single crystalPolycrystallineAmorphousAll of the aboveRenewable Energy Quiz Questions and Answers 75). The top layer of the semiconductor in the solar cell is also called as _______P - typeN - typePNP - typeAll of the aboveHintThe top layer in the solar cell is also called a negative type or N-type 76). The top layer of the semiconductor in the solar cell consists of _______SiliconPhosporousSilicon and phosphorousAll of the aboveHintThe thin top layer of the semiconductor in the solar cell consists of silicon and a very tiny amount of an element such as phosphorous that has more electrons than silicon. 77). The thin bottom layer of the semiconductor in the solar cell consists of _______SiliconBoronSilicon and boronAll of the aboveHintThe thin bottom layer of the semiconductor in the solar cell consists of silicon and an element such as boron Read More about Semiconductors 78). The solar cookers utilizes the ___________ energy to cook foodInfrared raysUltraviolet raysGamma raysNone of the aboveHintThe solar cookers utilize the infrared energy of the sun and by using the solar cooker we can easily cook the food 79). A combination of solar panels connected together is known as ______Solar cellsSolar arrayArrayNone of the aboveHintThe combination of solar panels connected together is known as a solar array and can be used to achieve the required current and voltage 80). What are the renewable energy sources of energy?Energy from wind, sunEnergy from flowing water, ocean wavesFossil fuels such as coal, petroleumBoth a and bHintThe energy from the sun, flowing water, wind, ocean waves are the renewable sources of energy because these sources can be regenerated or we can say that the supply of these sources is unlimited 81). How many components does solar energy have?OneTwoThreeFourHintSolar energy has two major components they are heat and light. 82). What are the renewable sources of energy?Solar energy, wind energy, hydroelectric powerGeothermal, oceanHydrogen, biomassAll of the aboveHintThere are a total of seven renewable sources of energy they are the ocean, wind, hydrogen, biomass, geothermal, hydroelectric, and solar energy 83). Choose an odd one outWind energyFossil fuelsHydrogenBiomassHintFossil fuels are the non-renewable sources of energy and the remaining are the renewable sources of energy 84). Which materials are required to make the solar cooker?Aluminum sheet, wooden box, ReflectorGlass slab, Black paintBoth a and bNone of the aboveHintThe materials which we need to make the solar cooker is the aluminum sheet, wooden box, reflector, glass slab, and black paint 85). The formula of energy emitted or energy radiated (p) by the sun is __________p=4πR2 σT4p=4πR2 σT2p=4πR σT4None of the above 86). The first generation of solar cell consists of __________Large areaHigh qualitySingle junction devicesAll of the aboveHintThe first generation of the solar cell consists of a large area, high quality, and single junction devices. It involves high energy and labor inputs to prevent any significant progress in reducing production costs. 87). The efficiency of the first generation of solar cell is about _______15-20%16-20%10-20%None of the aboveHintThe first generation of solar cell efficiency is about 15-20% 88). The solar constant value is ________1327 W/m21366 W/m21357 W/m21377 W/m2HintThe constant value of the solar for the earth is 1366 W/m2, which means on the earth surface when the earth is at a mean distance from the sun 89). The efficiency of monocrystalline silicon solar cell is about __________14-17%15-19%16-18%None of the aboveHintThe monocrystalline silicon solar cell is pure and defends free and the monocrystalline silicon solar cell efficiency is high that is from 14-17% 90). In polycrystalline silicon solar cell which material is used as a raw material?SilverCopperLiquid siliconNone of the aboveHintThe liquid silicon is used as a raw material in polycrystalline silicon solar cell and this polycrystalline silicon is obtained and followed by the solidification process 91). The deficiency of polycrystalline silicon solar cell is ________Less than monocrystalline silicon solar cellHigher than monocrystalline silicon solar cellEqual to monocrystalline Si solar cellNone of the aboveHintThe deficiency of polycrystalline silicon solar cell is less than monocrystalline silicon solar cell 92). What are the materials required for the construction of solar cells?P-type materialN-type materialBoth a and bNone of the aboveHintThe materials required for the construction of solar cells are P-type and N-type materials, where P-type material is doped with a trivalent impurity, and N-type material is doped with a pentavalent impurity 93). The efficiency of amorphous silicon solar cell is about __________5-7%15-19%16-18%None of the aboveHintThe amorphous silicon solar cell efficiency is between 5-7%, the efficiency of this solar cell is less than other solar cells and it is used for low power equipment. 94). Who observed the materials which turn light into energy?August MouchoutEdmund BecquerelMiyasakaNone of the aboveHintEdmund Becquerel observed the materials which turn light into energy in the year 1839 95). Who has seen the direct conversion of solar radiation into mechanical power?August MouchoutEdmund BecquerelMiyasakaNone of the aboveHintAugust Mouchout who has seen the direct conversion of solar radiation into mechanical power in the year 1860 96). Who developed perovskite materials into the solar cells?August MouchoutEdmund BecquerelMiyasakaNone of the aboveHintIn 2009, Miyasaka developed perovskite materials into the solar cells 97). The solar energy divided in to _________ActivePassiveBoth a and bNone of the aboveHintBasically the solar energy divided into two parts one is active and another one is passive 98). The photovoltaics divided in to _________CrystallineThin filmsBoth a and bNone of the aboveHintPhotovoltaics is the active solar energy which is divided into two parts one is called the crystalline and another one is called the thin films. 99). The main components of the solar thermal power systems are ___________ReflectorsReceiverBoth a and bNone of the aboveHintThe reflectors and receiver are the main components in the solar thermal power systems because the mirrors capture and focus sunlight onto a receiver. Read More about Electrical and Electronic Components 100). Which meter is used to measure the solar radiation flux ________PyranometerSunshine RecorderAnemometerAll of the aboveHintThe meter which is used to measure the solar radiation flux is pyranometer 101). The solar water heater payback period is up to _______2-4 years2-6 years1-2 years6-7 yearsHintThe payback period of solar water heater is up to 2-6 years Time is Up!
