Ai Quiz Test PDF

**Spørsmål 11 poeng** Suppose that you have been charging your electric car continuously for 6 hours and the battery charging level increases from 20% to 80%. The battery capacity is 60 kWh. How much is the power that you have used to charge the battery? Gruppe med svaralternativ 10 kW 6 kW 8 k...

**Spørsmål 11 poeng** Suppose that you have been charging your electric car continuously for 6 hours and the battery charging level increases from 20% to 80%. The battery capacity is 60 kWh. How much is the power that you have used to charge the battery? Gruppe med svaralternativ 10 kW 6 kW 8 kW 2 kW   [Merk spørsmål: Spørsmål 2](https://hvl.instructure.com/courses/29025/quizzes/18245/take) **Spørsmål 21 poeng** What is the equivalent of 1 kWh? Gruppe med svaralternativ 21 GJ 3.6 MJ 24 GJ 3.6 GJ   [Merk spørsmål: Spørsmål 3](https://hvl.instructure.com/courses/29025/quizzes/18245/take) **Spørsmål 31 poeng** What is true about renewable energy sources? Gruppe med svaralternativ They have higher energy density compared to fossil fuels They have lower energy density compared to fossil fuels They have similar energy density as fossil fuels None of the above   [Merk spørsmål: Spørsmål 4](https://hvl.instructure.com/courses/29025/quizzes/18245/take) **Spørsmål 41 poeng** What is the equivalent of 2000 MWh? Gruppe med svaralternativ 1 GWh 7.2 TJ 7.2 GJ 72 GJ   [Merk spørsmål: Spørsmål 5](https://hvl.instructure.com/courses/29025/quizzes/18245/take) **Spørsmål 51 poeng** What is true about Efficacy? Gruppe med svaralternativ It shows the amount of light output in lumens per W of electricity consumed It shows the energy output per fuel input The efficacy of fluorescent lamps is usually lower than that of incandescent lamps. None of the above   [Merk spørsmål: Spørsmål 6](https://hvl.instructure.com/courses/29025/quizzes/18245/take) **Spørsmål 61 poeng** Which energy source is a kind of use it or lose it type of energy source? Gruppe med svaralternativ Wind and Solar Natural gas and Oil Coal and Wind All are true   [Merk spørsmål: Spørsmål 7](https://hvl.instructure.com/courses/29025/quizzes/18245/take) **Spørsmål 71 poeng** Suppose you are using electricity for heating your house. If the annual heating demand is 15 MWh and the thermal efficiency of the heating device (direct electric heater) is 98%, how large is your annual electric energy consumption? Gruppe med svaralternativ 15.31 MWh 55.12 GJ 15310 kWh All are true   [Merk spørsmål: Spørsmål 8](https://hvl.instructure.com/courses/29025/quizzes/18245/take) **Spørsmål 81 poeng** Suppose you are using fuel oil for heating your house. The annual heating demand is 15 MWh and the thermal efficiency is 85%. You think that it is both polluting and not efficient to your expectation and decided to switch to electric heating with 98% thermal efficiency. How large is your annual energy saving? Gruppe med svaralternativ 1.86 MWh 1.5 MWh 2.34 MWh 3 MWh   [Merk spørsmål: Spørsmål 9](https://hvl.instructure.com/courses/29025/quizzes/18245/take) **Spørsmål 91 poeng** Suppose you are using direct electric heating in your house. The annual heating demand is 15 MWh and the thermal efficiency is 98%. But recently due to the high electricity prices, you decided to switch to heat pump with a COP of 3. How large is your annual energy saving? Gruppe med svaralternativ 12.65 MWh 10.31 MWh 18 GJ 5000 kWh   [Merk spørsmål: Spørsmål 10](https://hvl.instructure.com/courses/29025/quizzes/18245/take) **Spørsmål 101 poeng** Which of the following is true? Gruppe med svaralternativ Energy can be created and destroyed Energy can neither be created nor destroyed but it transforms from one form to the other None of the above   [Merk spørsmål: Spørsmål 11](https://hvl.instructure.com/courses/29025/quizzes/18245/take) **Spørsmål 111 poeng** If the unit of p is kJ/s and the unit of t is s, what is the unit of E in the equation below?   E=∫pdt Gruppe med svaralternativ kJ kJ/kg kJ/kg-s2 kW   [Merk spørsmål: Spørsmål 12](https://hvl.instructure.com/courses/29025/quizzes/18245/take) **Spørsmål 121 poeng** What is the main heating technology in residential sector in Norway? Gruppe med svaralternativ Wood stove. Heat pump. Direct electric heating. Bioheat boiler.   [Merk spørsmål: Spørsmål 13](https://hvl.instructure.com/courses/29025/quizzes/18245/take) **Spørsmål 131 poeng** Which fossil fuel is highly polluting? Gruppe med svaralternativ Coal Oil Natural gas All are equally polluting   [Merk spørsmål: Spørsmål 14](https://hvl.instructure.com/courses/29025/quizzes/18245/take) **Spørsmål 141 poeng** Which of the following measures are able to reduce GHG emissions? Gruppe med svaralternativ Sustainable energy production and utilization. Improving energy efficiency. Using carbon capture & storage (CCS) and carbon capture & utilization (CCU). All **Spørsmål 11 poeng** What is true about ocean thermal energy? Gruppe med svaralternativ It is energy available in the sea/ocean/fjord. Just 50 to 100m below the surface of the fjord we could find water with 7-9 degree celsius temperature even in winter time. Ocean thermal energy could be used as heat source in water to water heat pump The application of ocean thermal energy for power production is not attractive due to low efficiency. All are true   [[Merk spørsmål: Spørsmål 2]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 21 poeng** Which one of the following is true? Gruppe med svaralternativ Renewable energy sources are also alternative energy sources All clean energy sources are also renewable energy sources All renewable energy sources are also sustainable energy sources Green energy is a name often given to renewable energy sources while brown is for fossil fuels 1 and 4 are correct answers   [[Merk spørsmål: Spørsmål 3]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 31 poeng** In the event of high electricity prices what can we do to save energy? Gruppe med svaralternativ Replace heat pump with direct electric heating. Increase the thermostat setting temperature by 1 to 2 degree celsius Stop using hot water You may open your refrigerator frequently None of the above   [[Merk spørsmål: Spørsmål 4]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 41 poeng** What is true about energy resource and energy source? Gruppe med svaralternativ Energy resource referes to the the physical stock of the matter Energy source refers to the origin of the energy Both are the same 1 and 2 are correct answers   [[Merk spørsmål: Spørsmål 5]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 51 poeng** What are the key differences between renewable energy sources and non renewable energy sources? Gruppe med svaralternativ Renewables are finite in supply but non renewables are infinite Renewables are location independent and are available all over the place Non renewables have high energy density than renewables The environmental impact of renewables is zero   [[Merk spørsmål: Spørsmål 6]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 61 poeng** Assume that the total energy consumption of Norway is increasing annually by 1.2%. How can we meet the growing demand? Gruppe med svaralternativ By producing 1.2% more energy Increasing the energy efficiency by 1.2% By doing 1 and 2 simultaneously All are correct answers   [[Merk spørsmål: Spørsmål 7]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 71 poeng** Assume you have installed a 100 kW wind turbine in your backyard. You are not connected to the grid. Your electricity demand varies between 10 kW and 100 kW over the whole year. How can you balance your demand and supply? Gruppe med svaralternativ It is impossible to balance demand and supply without installing storage or diesel generator By adjusting the wind power production By adjusting the demand with the wind power production   [[Merk spørsmål: Spørsmål 8]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 81 poeng** For proper functioning, the demand and supply in the grid need to be balanced always. This is controlled by the grid frequency, which is set at 50 Hz with a 0.2% up and down deviation. You know that you have wind turbine, reserviour hydro, coal power plant, and nuclear power plant connected to the power grid. If the frequency of the grid suddenly increased to 50.5 Hz what will you do to balance the demand and supply in the system? Gruppe med svaralternativ I will increase the wind power production I will reduce the wind power production I will either reduce the hydropower production or start on low priority loads I will reduce the coal power plant production   [[Merk spørsmål: Spørsmål 9]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 91 poeng** For proper functioning, the demand and supply in the grid need to be balanced always. This is controlled by the grid frequency, which is set at 50 Hz with a 0.2% up and down deviation. You know that you have wind turbine, reserviour hydro, coal power plant, and nuclear power plant connected to the power grid. If the frequency of the grid suddenly reduced to 49.5 Hz what will you do to balance the demand and supply in the system? Gruppe med svaralternativ I will increase the wind power production I will reduce the coal power plant production I will increase the hydropower production I will either shut down low priority loads or increase the hydropower production   [[Merk spørsmål: Spørsmål 10]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 101 poeng** Assume you have installed 7.5 MW wind turbine with storage. You are not connected with the grid. The turbine can produce 7.5 MW at 15 m/s. On a particular day and time, your demand is 6 MW and the wind is blowing at 15 m/s. You noticed that the storage is fully charged. What will you do to balance your demand and supply? Gruppe med svaralternativ I will reduce the wind power production I will curtail the wind power production 1 and 2 are correct answers   [[Merk spørsmål: Spørsmål 11]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 111 poeng** What is true about availability factor of a wind turbine? Gruppe med svaralternativ It is always higher than or equal to the capacity factor It is always less than or equal to the capacity factor It is always equal to the capacity factor   [[Merk spørsmål: Spørsmål 12]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 121 poeng** Why is the capacity factor solar PV is lower than wind turbines? Gruppe med svaralternativ Wind is blowing all day but solar radiation is available only daytime. The capacity of solar PV is usually lower than that of wind power It is just a coincidence that this happen   [[Merk spørsmål: Spørsmål 13]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 131 poeng** Which power plant has a desirable characteristics for the integration of wind power? Gruppe med svaralternativ Nuclear power plant Coal power plant Gas turbine power plant Reserviour hydropower plant 3 and 4 are correct answers   [[Merk spørsmål: Spørsmål 14]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 141 poeng** Assume there are n number of components connected in series in a system. If the efficiency (η) of each components are the same, what would be the system efficiency? Gruppe med svaralternativ n\*η η^n^ n^η^   [[Merk spørsmål: Spørsmål 15]](https://hvl.instructure.com/courses/29025/quizzes/18252/take) **Spørsmål 151 poeng** Assume that you have the following power demand during a particular day in winter and summer. Which power plant will you turn on for which type of load? Et bilde som inneholder tekst, diagram, line, Plottdiagram Automatisk generert beskrivelse Gruppe med svaralternativ I will turn on the hydropower for the base, intermidate, and peak loads I will turn on the coal and nuclear power plant only for the base load I will turn on gas turbine power plant for the peak load I will turn on the hydro power plant for the intermidate load 2, 3 and 4 are correct answers **Spørsmål 11 poeng** What is true about hydropower plant? Gruppe med svaralternativ It is less matured technology than wind turbines It is flexible in its operation all the time Hydropower may have environmental impacts 2 and 3 are correct answers   [Merk spørsmål: Spørsmål 2](https://hvl.instructure.com/courses/29025/quizzes/18258/take) **Spørsmål 21 poeng** What is the source of methane emissions from hydropower reservoirs? Gruppe med svaralternativ Decomposition of organic matters by microorganisms in the absense of oxygen. Aquatic life inside the reservoirs. Methane leakage from the ground in reserviours. All are true   [Merk spørsmål: Spørsmål 3](https://hvl.instructure.com/courses/29025/quizzes/18258/take) **Spørsmål 31 poeng** What is the major environmental concern of hydropower development? Gruppe med svaralternativ Large scale development often involve displacement of people Fish and other organisms can be injured or killed by turbine blades There is large amount of water lose through evaporation from reservoirs Variable water level in the reservoir due to variable power production often distress the aquatic animals The low and higher water level control of the reserviour in Norway is mainly for enviromental reason. All are true   [Merk spørsmål: Spørsmål 4](https://hvl.instructure.com/courses/29025/quizzes/18258/take) **Spørsmål 41 poeng** Which one of the following chronological order is true about a typical hydropower plant in Norway? Gruppe med svaralternativ Reserviour-Headrace tunnel-surge shaft/tank-pressure shaft-turbine& power house-tailrace tunnel-river Reservior-pressure tunnel-air cushion surge chamber-turbine&power house-tailrace tunnel-river Reservior-headrace tunnel-surge tank/shaft-penstoc-turbine&power house-river All are true   [Merk spørsmål: Spørsmål 5](https://hvl.instructure.com/courses/29025/quizzes/18258/take) **Spørsmål 51 poeng** What is the most common type of hydropower tunnel construction in Norway? Gruppe med svaralternativ Concrete or steel lined tunnel Steel lined tunnel Unlined (shotcrete or concrete spary) tunnel   [Merk spørsmål: Spørsmål 6](https://hvl.instructure.com/courses/29025/quizzes/18258/take) **Spørsmål 61 poeng** Which component in a hydropower plant do the job of controlling unwanted material entering into the turbine? Gruppe med svaralternativ Penstock Trash rack Control gate Headrace tunnel   [Merk spørsmål: Spørsmål 7](https://hvl.instructure.com/courses/29025/quizzes/18258/take) **Spørsmål 71 poeng** What is net head in hydropower plant? Gruppe med svaralternativ It is the gross head plus the head loss It is the gross head minus the head loss It is equal to the gross head   [Merk spørsmål: Spørsmål 8](https://hvl.instructure.com/courses/29025/quizzes/18258/take) **Spørsmål 81 poeng** Why we call the tunnel \"pressure tunnel\" in hydropower plant? Gruppe med svaralternativ It creates pressure It transports high pressure water Both are true   [Merk spørsmål: Spørsmål 9](https://hvl.instructure.com/courses/29025/quizzes/18258/take) **Spørsmål 91 poeng** What is the benefit of large reserviour of hydropower plant other than power production? Gruppe med svaralternativ For water supply storage For fishing For recreation For transport All are true   [Merk spørsmål: Spørsmål 10](https://hvl.instructure.com/courses/29025/quizzes/18258/take) **Spørsmål 101 poeng** How large is the flexible hydropower plant capacity in Norway? Gruppe med svaralternativ 50% of the total hydropower capacity 75% of the total hydropower capacity 95% of the total hydropower capacity 100% of the total hydropower capacity   [Merk spørsmål: Spørsmål 11](https://hvl.instructure.com/courses/29025/quizzes/18258/take) **Spørsmål 111 poeng** Which of the following is true? Gruppe med svaralternativ The hydropower industry in Norway is generally an underground industry The topography (steep mountains) and geological condition (hard rock) makes it favourable for the use of underground tunnel for hydropower in Norway Surface mounted penstocks are difficult to install in steep mountains and are subjected to rock fall, slides, avalanch. The reason for going underground were lack of steel supply and high steel prices after world war II. All are true