Energy Conservation In Lighting SySTEM Quiz

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| By Swapnil Surana
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Swapnil Surana
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Energy Conservation In Lighting System Quiz - Quiz

How much do you know about saving energy? Find out today with the assistance of our energy conservation in lighting systems quiz! The conservation of energy is of paramount importance, especially in today's day and age when we consume more and more energy by the second. The role we play is critical, and we should be careful when, for example, designing a lighting system. Stay safe and have fun while you are taking the quiz. Let's go!


Questions and Answers
  • 1. 

    If the combined loss of electricity in the transmission and distribution network is 30%, then how much MW of generation is required when the total power requirement of a city is 3000MW?

    • A.

      2250 MW

    • B.

      3000 MW

    • C.

      4000 MW

    • D.

      4286 MW

    Correct Answer
    D. 4286 MW
    Explanation
    The combined loss of electricity in the transmission and distribution network is 30%. This means that only 70% of the generated power reaches the city. To find out how much generation is required, we need to divide the total power requirement of the city (3000 MW) by 70% (0.7). This calculation gives us 4286 MW, which is the amount of generation required to meet the city's power demand after accounting for the 30% loss in the transmission and distribution network.

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  • 2. 

    Occupancy sensors are used to switch off lights when there are no occupants.  These are electronic devices and consume very little energy for their operation. Modern days occupancy sensors.

    • A.

      Uses infrared technology

    • B.

      Uses ultrasonic technology

    • C.

      Uses ultraviolet technology

    • D.

      Both a and b

    Correct Answer
    A. Uses infrared technology
    Explanation
    Occupancy sensors use infrared technology to detect the presence of occupants in a room. Infrared sensors can detect heat signatures emitted by humans or animals, allowing the sensor to determine if there are occupants present. This technology is commonly used in buildings to automatically switch off lights when there are no occupants, helping to save energy and reduce electricity consumption. Ultrasonic and ultraviolet technologies are not mentioned in the given explanation, so the correct answer is "Uses infrared technology".

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  • 3. 

    Approximately how much money would you save each year if you replace five incandescent bulbs of 60 Watt each with five LED bulbs of 10 Watt each? Assume that the lights are used for four hours a day for 365 days and the cost of energy per unit is Rs 5. 

    • A.

      Rs‐1625

    • B.

      Rs‐725

    • C.

      Rs‐1825

    • D.

      Rs‐1025

    Correct Answer
    C. Rs‐1825
    Explanation
    By replacing five incandescent bulbs of 60 Watt each with five LED bulbs of 10 Watt each, we can calculate the total energy savings. The energy savings per bulb is 60 - 10 = 50 Watts.

    For each bulb, the daily energy savings would be 50 Watts x 4 hours = 200 Watt-hours.

    For all five bulbs, the total daily energy savings would be 200 Watt-hours x 5 = 1000 Watt-hours or 1 kWh.

    In a year, the total energy savings would be 1 kWh x 365 days = 365 kWh.

    The cost of energy per unit is Rs 5, so the total cost savings would be 365 kWh x Rs 5 = Rs 1825.

    Therefore, the correct answer is Rs‐1825.

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  • 4. 

    What is the best method for reducing your personal computer's energy use?  

    • A.

      Keep just one program running when you leave your desk

    • B.

      Put the computer in sleep mode or deactivate the screen saver

    • C.

      Close all open programs

    • D.

      Leave the computer on at all times

    Correct Answer
    B. Put the computer in sleep mode or deactivate the screen saver
    Explanation
    Putting the computer in sleep mode or deactivating the screen saver is the best method for reducing a personal computer's energy use. When the computer is in sleep mode, it consumes less power as it temporarily shuts down most of its operations. Deactivating the screen saver also helps to conserve energy by preventing unnecessary power usage when the computer is idle. Keeping just one program running or closing all open programs may not significantly reduce energy consumption, and leaving the computer on at all times would consume the most energy.

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  • 5. 

    To find out the efficiency of a drinking water pump, we have to measure the volume of water discharged from the pump. A modern electronic device that measures the velocity and indicates the discharge through pipes is known as: 

    • A.

      Lux meter

    • B.

      Infrared thermometer

    • C.

      Ultrasonic flow meter

    • D.

      Color doppler

    Correct Answer
    C. Ultrasonic flow meter
    Explanation
    An ultrasonic flow meter is a modern electronic device that measures the velocity and indicates the discharge of water through pipes. It is specifically designed for measuring the volume of water discharged from a pump, making it the most suitable option for determining the efficiency of a drinking water pump. A lux meter measures the intensity of light, an infrared thermometer measures temperature, and a color doppler is used for medical imaging.

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  • 6. 

    We can replace our electrical geysers (water heaters) with some alternate energy-efficient equipment.  

    • A.

      Induction heater

    • B.

      Solar heater

    • C.

      Electrical coil heater

    • D.

      Microwave heater

    Correct Answer
    B. Solar heater
    Explanation
    An explanation for the correct answer, "Solar heater," is that solar heaters utilize energy from the sun to heat water, making them an energy-efficient alternative to electrical geysers. By harnessing renewable energy, solar heaters can reduce electricity consumption and lower carbon emissions. This makes them a sustainable and environmentally friendly option for heating water.

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  • 7. 

    It is essential to measure the cooling effect of an Air Conditioner (AC) to find out the present cooling capacity which is the tonnage of the AC. Which instrument we should use to measure the tonnage of AC. 

    • A.

      Digital thermometer

    • B.

      Digital anemometer

    • C.

      Digital voltmeter

    • D.

      Both a and b

    Correct Answer
    D. Both a and b
    Explanation
    To measure the tonnage of an AC, we need to measure both the temperature and the airflow. A digital thermometer is used to measure the temperature, while a digital anemometer is used to measure the airflow. By measuring both of these factors, we can determine the cooling effect and thus the tonnage of the AC. Therefore, both a digital thermometer and a digital anemometer should be used to measure the tonnage of an AC.

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  • 8. 

    In Industries, exhaust gases are released into the atmosphere through chimneys. The exhaust gas temperature can be very high and an efficient way of utilizing this waste heat can be: 

    • A.

      For drying the cold area

    • B.

      For air conditioning

    • C.

      For heating water

    • D.

      Both of b & c

    Correct Answer
    C. For heating water
    Explanation
    The exhaust gas temperature in industries can be very high, making it a valuable source of waste heat. One efficient way of utilizing this waste heat is by using it to heat water. This can be done by passing the exhaust gases through a heat exchanger, transferring the heat to the water. Heating water using waste heat is a cost-effective and environmentally friendly solution, as it reduces the need for additional energy sources to heat water. Therefore, using exhaust gases to heat water is a practical and efficient way to utilize waste heat in industries.

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  • 9. 

    Unnecessary use of light in day time can be avoided using different methods. Which one is economical mostly for warehouses:

    • A.

      Use of CFL light

    • B.

      Use of T5 light

    • C.

      Use of transparent sheet in the roof

    • D.

      None of these

    Correct Answer
    C. Use of transparent sheet in the roof
    Explanation
    Using a transparent sheet in the roof of a warehouse allows natural daylight to enter the space, reducing the need for artificial lighting during the day. This method is economical as it eliminates the need for additional lighting fixtures and reduces electricity consumption, resulting in cost savings. Additionally, natural light has been shown to improve productivity and create a more comfortable working environment for employees.

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  • 10. 

    In factories and industries, we use an exhaust fan to remove hot gases and other pollutants. These exhaust fans consume a lot of energy for their operation. Which of these can replace exhaust fans and save electrical energy: 

    • A.

      Pedestal fan

    • B.

      Ceiling fans

    • C.

      Turbo ventilator

    • D.

      Wall mounted fans

    Correct Answer
    C. Turbo ventilator
    Explanation
    Turbo ventilators can replace exhaust fans and save electrical energy in factories and industries. Turbo ventilators are designed to harness the natural wind power and create a pressure difference to remove hot gases and pollutants from the premises. Unlike exhaust fans, turbo ventilators do not require electricity to operate, making them more energy-efficient. They utilize the wind energy, which is freely available, to provide ventilation and reduce the energy consumption of the facility.

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  • 11. 

    A car owner uses six liters of petrol each month. If he drives his vehicle at an economical speed, he can save 1-liter petrol each month. Then how much CO2 emission can be reduced in one year? 

    • A.

      26.6 Kg

    • B.

      37.6 Kg

    • C.

      30.0 Kg

    • D.

      33.0 Kg

    Correct Answer
    A. 26.6 Kg
    Explanation
    The car owner uses 6 liters of petrol each month. If he drives at an economical speed, he can save 1 liter of petrol each month. In one year, there are 12 months, so the total amount of petrol saved in one year would be 12 liters (1 liter per month x 12 months = 12 liters). The emission of CO2 from burning one liter of petrol is approximately 2.2 kg. Therefore, the reduction in CO2 emissions in one year would be 12 liters x 2.2 kg/liter = 26.4 kg.

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  • 12. 

    Which is the most economical way of increasing the light output from a lamp? 

    • A.

      Replace the light with a new one

    • B.

      Replace with a more powerful light

    • C.

      Clean the light surface

    • D.

      None of these

    Correct Answer
    C. Clean the light surface
    Explanation
    Cleaning the light surface is the most economical way of increasing the light output from a lamp. Dust and dirt can accumulate on the surface of the light, reducing its effectiveness and blocking the light from shining through. By cleaning the light surface, the accumulated dust and dirt can be removed, allowing more light to pass through and increasing the overall light output. This is a cost-effective solution as it does not require purchasing a new light or a more powerful one.

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  • 13. 

    Energy can neither be created nor destroyed implies 1) Energy is converted from one form to another form 2) Energy is only available in form of heat. 3) Energy is created only by burning fuel 4) Energy cannot be converted from one form to another   Which of the above statement is correct?

    • A.

      1

    • B.

      2

    • C.

      3

    • D.

      4

    Correct Answer
    A. 1
    Explanation
    The correct answer is 1) Energy is converted from one form to another form. This statement is correct because the law of conservation of energy states that energy cannot be created or destroyed, but it can be converted from one form to another. This means that energy can change from potential energy to kinetic energy, electrical energy to thermal energy, and so on.

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  • 14. 

    Initiatives such as the use of energy-efficient electrical appliances, reducing electricity consumption through awareness to bring down the energy requirement can be termed as: 

    • A.

      Disaster Management

    • B.

      Demand Response

    • C.

      Demand Side Management

    • D.

      Energy Management

    Correct Answer
    D. Energy Management
    Explanation
    Initiatives such as the use of energy-efficient electrical appliances and reducing electricity consumption through awareness are aimed at managing and optimizing energy usage. This term can be referred to as energy management, as it involves actively monitoring, controlling, and conserving energy resources to meet the desired energy requirements efficiently. It focuses on implementing strategies and practices to reduce energy waste, increase energy efficiency, and promote sustainable energy consumption.

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  • 15. 

    The program implemented by the Bureau of Energy Efficiency to supply CFL lights at reduced costs to replace incandescent bulbs is known as 

    • A.

      Light Emitting Diode (LED)

    • B.

      Grameen Vidut Yojana (GVY)

    • C.

      Bachat Lamp Yojana (BLY)

    • D.

      State Designated Agency (SDA)

    Correct Answer
    C. Bachat Lamp Yojana (BLY)
    Explanation
    The correct answer is Bachat Lamp Yojana (BLY). The program implemented by the Bureau of Energy Efficiency to supply CFL lights at reduced costs to replace incandescent bulbs is known as Bachat Lamp Yojana (BLY).

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  • 16. 

    The house heats up during summer due to heating up of the walls and roof. We can reduce this heating process economically?

    • A.

      Using light coloured walls and painting the roof with reflecting paints

    • B.

      Covering the roof with insulating materials and planting trees to provide shades

    • C.

      Using more electricity energy to cool the house

    • D.

      Spraying cool water

    Correct Answer
    A. Using light coloured walls and painting the roof with reflecting paints
    Explanation
    Using light coloured walls and painting the roof with reflecting paints can help reduce the heating process economically. Light colours and reflective paints have higher solar reflectance, meaning they reflect more sunlight and absorb less heat compared to dark colours. This can help keep the walls and roof cooler, reducing the amount of heat transferred into the house. By implementing this method, less energy will be required for cooling the house, resulting in cost savings.

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  • 17. 

    Do the so-called zero watt incandescent bulbs approximately consume the following power?  

    • A.

      0

    • B.

      15

    • C.

      50

    • D.

      100

    Correct Answer
    B. 15
    Explanation
    The so-called zero watt incandescent bulbs do not actually consume zero power, but they consume a very small amount of power. The correct answer is 15, as these bulbs consume approximately 15 watts of power. This is significantly lower than traditional incandescent bulbs, which typically consume much higher wattages. The term "zero watt" is used to indicate that these bulbs have a very low power consumption, but they still consume some amount of power.

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  • 18. 

    Which of the following can be adopted for saving cooking gas?   

    • A.

      Using a pressure cooker instead of an open vessel

    • B.

      Keeping rice, dal etc. in water soaked condition for some time before cooking

    • C.

      Using a small burner in place of a large burner

    • D.

      All of the above

    Correct Answer
    D. All of the above
    Explanation
    Using a pressure cooker instead of an open vessel can save cooking gas because the pressure cooker retains heat and steam, allowing food to cook faster and using less gas. Keeping rice, dal, etc. in water soaked condition before cooking can also save cooking gas as the grains become softer and cook faster, reducing the cooking time and gas usage. Using a small burner in place of a large burner can save cooking gas by reducing the amount of gas used for cooking. Therefore, all of the above options can be adopted to save cooking gas.

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  • 19. 

    Most of the energy used for lighting in a LED is converted to:   

    • A.

      Light energy

    • B.

      Heat energy

    • C.

      Sound energy

    • D.

      Electrical energy

    Correct Answer
    A. Light energy
    Explanation
    LEDs (Light Emitting Diodes) are designed to convert electrical energy into light energy. Unlike traditional incandescent bulbs, LEDs do not produce a significant amount of heat or sound energy. Instead, they efficiently convert electrical energy into visible light, making them a more energy-efficient lighting option. Therefore, the correct answer is light energy.

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  • 20. 

    If machine ‘A’ delivers output equivalent to 700 watts and takes input power of 1000 watts,  machine  ‘B’ delivers an output of 1555 watts and takes input power of 2000 watts, then which machine is more efficient?  

    • A.

      Machine A

    • B.

      Machine B

    • C.

      Both A and B

    • D.

      Cannot be determined

    Correct Answer
    B. Machine B
    Explanation
    Machine B is more efficient because it delivers a higher output (1555 watts) compared to Machine A (700 watts) while consuming a lower input power (2000 watts) compared to Machine A (1000 watts). Efficiency is measured by the ratio of output power to input power, and in this case, Machine B has a higher output-to-input power ratio, indicating greater efficiency.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 22, 2017
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    Swapnil Surana
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