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 Angle Slope Solar Altitude Angle Solar Azimuth Angle HintThe solar altitude angle is the zenith angle complement2). Which Meter is used to measure the Beam Radiations ________ Pyrheliometer Sunshine Recorder Anemometer All of the above HintThe meter which is used to measure the beam radiations is a pyrheliometer.3). How many types of solar cells? One Two Three Four HintThey are mono silicon crystalline, polycrystalline silicon & amorphous silicon crystalline4). In which collector the efficiency is maximum ________ Flat Plate Line Focusing Evacuated Tube Paraboloid Dish HintIn paraboloid dish collector, the efficiency is maximum compared with other collectors5). 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 Cells Edison Cells Fuel Cells Cryogenic Cells HintThe source of energy used for satellites is solar cells7). The Pyranometer measures _________ Direct Radiation Diffusion Radiation Both a and b None of the above HintThe pyranometer measures both direct and diffuse radiations8). The single solar cell voltage is about _______ 0.2 V 0.5 V 1.0 V 2.0 V HintThe single solar cell voltage is about 0.5 V9). The solar heater function is to convert the solar energy in to ________ Radiation Electrical Energy Thermal Energy None of the above HintThe function of the solar heater is to convert the solar energy into thermal energy10). The solar heater life span is around _________ 4-5 years 2-6 years 1-2 years 6-7 years HintThe payback period of solar water heater is up to 2-6 years11). The radiation of solar includes ____________ Ultraviolet light and Visible light Radio waves and Infrared waves X rays and Gamma rays All of the above HintThe 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 cell Photoelectric cell Battery None of the above HintThe PV cell is used to convert solar energy directly into an electrical energy13). Which of the following is the most dangerous type of radiation ________ Alpha radiation Beta radiation Gamma radiation None of the above HintAlpha radiation is the most dangerous type of radiation 14). The energy which is stored as latent heat is called as _______ energy Mechanical energy Electrical energy Thermal energy None of the above HintThe energy which is stored as latent heat is called thermal energy15). The solar energy directly used for ______ Drying Water heating Distillation All of the above HintSolar energy directly used for drying, water heating, distillation16). The nuclear radiation unit is ______ Pascal Rankine Reaumur Roentgen HintThe unit of nuclear radiation is roentgen17). The standard form of HHW is __________ High level waste Low level waste High and low level waste None of the above HintThe full form of HHW is High-Level Waste18). _________ radiation is called as a diffuse radiation Scattered solar radiation Beam radiation Infrared radiation None of the above HintThe scattered solar radiation is also called a diffuse radiation19). Which type of radiation reaches the surface without absorption or without scattering? Scattered solar radiation Infrared radiation Beam radiation None of the above HintThe type of radiation that reaches the surface without absorbed or without scattering is beam radiation20). From the sun the solar energy is radiated in the form of ___________ waves Electromagnetic waves Infrared waves Transverse waves None of the above HintSolar energy is radiated in the form of electromagnetic waves 21). The less insolation occurs when the sun is ________ At night Low in the sky High in the sky None of the above HintLow in the sky22). In solar cells _________ material is used Copper Silver Silicon None of the above HintSilicon23). The range of solar cell efficiency is 5-10% 10-15% 15-20% None of the above HintThe range of solar cell efficiency is about 10-15%24). In aircrafts _____________ batteries are used Alkaline battery Aluminium-ion battery Nickel-iron battery None of the above HintThe batteries which are used in aircraft is nickel-iron batterySolar Energy Interview Questions25). The sun emits ______________ radiations Infrared Visible Small amount of ultraviolet All of the above HintAll of the above26). Visible radiations gives ______________ energy Light energy Heat energy Both a and b None of the above HintThe visible radiations give light energy27). Infrared radiations gives ______________ energy Light energy Heat energy Both a and b None of the above HintThe infrared radiations give heat energy28). The Infrared radiations, visible radiations and small amount of ultraviolet radiations are collectively known as ______________ energy Light energy Heat energy Solar energy None of the above HintSolar energy29). In how many ways we can harness solar energy? One-way Two ways Three ways Four ways HintIn two ways we can harness the solar energy they are direct way and indirect way 30). Plants convert solar energy into ____________ energy Chemical energy Light energy Heat energy None of the above HintThe plants convert solar energy into chemical energy31). The solar constant also called as ____________ Solar intensity Solar irradiance Both a and b None of the above HintThe solar constant is also called solar intensity32). The formula of solar constant is ________ S= (R/r).σT2 S = (R/r)2. σT4 S = (R/r2).ΣT2 None of the above HintThe 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 generation Two generations Three generations Four generations HintThe 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/m2 S.I unit= Wm2 S.I unit= W/m2 None of the above HintThe S.I unit of the solar constant is W/m235). What is the solar constant value? S = 1.4*103 W/m2 S = 1.4*102 W/m2 S = 1.4*104 W/m2 None of the above HintThe solar constant is 1.4*103 W/m236). 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 above HintThe 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, sun Energy from flowing water, ocean waves Fossil fuels such as coal, petroleum Both a and b HintFossil 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 limited38). Solar energy can leads to generate the electricity through ______ Heat engines Photovoltaics Heat engines and Photovoltaics None of the above HintSolar energy can leads to generate electricity through heat engines and photovoltaics. 39). The solar energy is essentially useful in _________ contexts Solar thermal Solar photovoltaics Solar thermal and Solar photovoltaics None of the above HintSolar energy is essentially useful in two contexts they are solar thermal and solar photovoltaics40). The high temperature in the concentrating solar technologies divided into how many parts? One Two Three Four HintThe high temperature in the concentrating solar technologies divided into two parts they are central tower collectors, and parabolic dish collectors41). Choose the odd one out Coal Petroleum Oil Biomass HintBiomass is the renewable sources of energy and the remaining are the non-renewable sources of energy42). What are the drawbacks of the solar cooker? Doesn’t work at night Solar cooker takes more time to cook the food Both a and b None of the above HintThe 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 layer Two layers Three layers Four layers HintThe solar cell is made up of silicon and it consists of two layers they are silicon boron layer and the silicon arsenic layer44). What are the advantages of the solar cells? Maintenance is very low No pollution Maintenance is very high Both a and b HintThere 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 expensive Efficiency is low Wire which is used for connections is made up of silver material All of the above HintSome 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 silver46). What is the importance of solar energy? Environmental friendly Saves your money Low Maintenance and diverse applications All of the above HintSolar energy protects the environment, saves your money, and the maintenance cost of solar energy is very low or we can say that almost negligible47). What are the different methods of solar energy utilizations? Direct method Indirect method Both a and b None of the above HintThere are two methods of solar energy utilizations they are the direct method and indirect method48). The direct method of solar energy utilization can be classified into ______? Solar thermal Solar photovoltaic Solar thermal and solar photovoltaic None of the above HintThe direct method of solar energy utilization can be classified into two they are solar thermal and solar photovoltaicRenewable Energy Questions and Answers49). __________ comes under the indirect method of solar energy utilization Water power, wind, wave energy Marine currents, OTEC Biomass All of the above HintThe 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 above HintIn solar thermal energy, the efficiency range is between 20-45%51). The medium temperature in the concentrating solar technologies divided into how many parts? One Two Three Four HintThe medium temperature in the concentrating solar technologies divided into two parts they are parabolic trough collectors (PTC), and fresnel collectors52). The thin bottom layer of the semiconductor in the solar cell is also called as _______ P - type N - type PNP - type All of the above HintThe thin bottom layer of the semiconductor in the solar cell is also called a positive type or P-type53). The concentrating solar technologies divided into how many parts? One Two Three Four HintThe 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? One Two Three Four HintThe 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 above HintIn 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 efficiency Generator efficiency Both a and b None of the above HintThe 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 tube Anti-reflective layer coated tube Both a and b None of the above HintThe anti-reflective layer coated tube and absorber layer coated tubes improve the efficiency of the receiver59). The coating materials which are used in solar absorber should possess the _________ properties High absorptivity, low emissivity Strong adhesion, high durability High thermal conductivity, corrosion, and wear resistance All of the above HintThe solar absorber should possess the properties like high absorptivity, low emissivity, strong adhesion, high durability, high thermal conductivity, corrosion, and wear resistance60). What is the source of solar energy? Nuclear fusion Nuclear power plant Coal None of the above HintNuclear 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? One Two Three Four HintSolar energy has three major parts62). The semiconductor is the part of the solar cell that has ___________ Top layer Bottom layer Middle layer All of the above HintThe 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 above HintThe 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 above HintThe 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 above HintThe solar radiation range in ultraviolet is about 3-5%66). How many types of solar cells are there based on the crystal structure? One Two Three Four HintThe three types of solar cells are based on the crystal structure.67). What are the parts of solar energy? Visible Infrared Ultraviolet All of the above HintThe 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 current Fill factor Power conversion efficiency All of the above HintThe open-circuit voltage and short circuit current, fill factor, and power conversion efficiency are the characteristics of the solar cells69). What is the most commonly used renewable energy? Solar energy Tidal energy Hydro energy None of the above HintThe most commonly used renewable energy source is solar energy70). What is the basic component of the PV system (Photovoltaic system)? Battery Charge collector Solar cell All of the above HintThe basic component of the photovoltaic system is the solar cell71). How much voltage does a single solar cell produce? 1v 0.5v 0.01v None of the above HintThe single solar cell has a capacity to produce 0.5 volts of electricity72). The efficiency of the poly crystalline silicon solar cell is about __________ 14-17% 12-17% 13-15% None of the above HintThe efficiency of the polycrystalline silicon solar cell is about 13-15% which is less than the monocrystalline silicon solar cell73). The semiconductor is the part of the solar cell that has ___________ One layer Two layers Three layers None of the above HintThe 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 crystal Polycrystalline Amorphous All of the above Renewable Energy Quiz Questions and Answers75). The top layer of the semiconductor in the solar cell is also called as _______ P - type N - type PNP - type All of the above HintThe top layer in the solar cell is also called a negative type or N-type76). The top layer of the semiconductor in the solar cell consists of _______ Silicon Phosporous Silicon and phosphorous All of the above HintThe 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 _______ Silicon Boron Silicon and boron All of the above HintThe thin bottom layer of the semiconductor in the solar cell consists of silicon and an element such as boron Read More about Semiconductors78). The solar cookers utilizes the ___________ energy to cook food Infrared rays Ultraviolet rays Gamma rays None of the above HintThe solar cookers utilize the infrared energy of the sun and by using the solar cooker we can easily cook the food79). A combination of solar panels connected together is known as ______ Solar cells Solar array Array None of the above HintThe combination of solar panels connected together is known as a solar array and can be used to achieve the required current and voltage80). What are the renewable energy sources of energy? Energy from wind, sun Energy from flowing water, ocean waves Fossil fuels such as coal, petroleum Both a and b HintThe 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 unlimited81). How many components does solar energy have? One Two Three Four HintSolar energy has two major components they are heat and light.82). What are the renewable sources of energy? Solar energy, wind energy, hydroelectric power Geothermal, ocean Hydrogen, biomass All of the above HintThere are a total of seven renewable sources of energy they are the ocean, wind, hydrogen, biomass, geothermal, hydroelectric, and solar energy83). Choose an odd one out Wind energy Fossil fuels Hydrogen Biomass HintFossil fuels are the non-renewable sources of energy and the remaining are the renewable sources of energy84). Which materials are required to make the solar cooker? Aluminum sheet, wooden box, Reflector Glass slab, Black paint Both a and b None of the above HintThe materials which we need to make the solar cooker is the aluminum sheet, wooden box, reflector, glass slab, and black paint85). The formula of energy emitted or energy radiated (p) by the sun is __________ p=4πR2 σT4 p=4πR2 σT2 p=4πR σT4 None of the above 86). The first generation of solar cell consists of __________ Large area High quality Single junction devices All of the above HintThe 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 above HintThe first generation of solar cell efficiency is about 15-20%88). The solar constant value is ________ 1327 W/m2 1366 W/m2 1357 W/m2 1377 W/m2 HintThe 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 sun89). The efficiency of monocrystalline silicon solar cell is about __________ 14-17% 15-19% 16-18% None of the above HintThe 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? Silver Copper Liquid silicon None of the above HintThe liquid silicon is used as a raw material in polycrystalline silicon solar cell and this polycrystalline silicon is obtained and followed by the solidification process91). The deficiency of polycrystalline silicon solar cell is ________ Less than monocrystalline silicon solar cell Higher than monocrystalline silicon solar cell Equal to monocrystalline Si solar cell None of the above HintThe deficiency of polycrystalline silicon solar cell is less than monocrystalline silicon solar cell92). What are the materials required for the construction of solar cells? P-type material N-type material Both a and b None of the above HintThe 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 impurity93). The efficiency of amorphous silicon solar cell is about __________ 5-7% 15-19% 16-18% None of the above HintThe 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 Mouchout Edmund Becquerel Miyasaka None of the above HintEdmund Becquerel observed the materials which turn light into energy in the year 183995). Who has seen the direct conversion of solar radiation into mechanical power? August Mouchout Edmund Becquerel Miyasaka None of the above HintAugust Mouchout who has seen the direct conversion of solar radiation into mechanical power in the year 186096). Who developed perovskite materials into the solar cells? August Mouchout Edmund Becquerel Miyasaka None of the above HintIn 2009, Miyasaka developed perovskite materials into the solar cells97). The solar energy divided in to _________ Active Passive Both a and b None of the above HintBasically the solar energy divided into two parts one is active and another one is passive98). The photovoltaics divided in to _________ Crystalline Thin films Both a and b None of the above HintPhotovoltaics 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 ___________ Reflectors Receiver Both a and b None of the above HintThe 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 Components100). Which meter is used to measure the solar radiation flux ________ Pyranometer Sunshine Recorder Anemometer All of the above HintThe meter which is used to measure the solar radiation flux is pyranometer101). The solar water heater payback period is up to _______ 2-4 years 2-6 years 1-2 years 6-7 years HintThe payback period of solar water heater is up to 2-6 years Time is Up! Time's up
