Energy Conservation In Lighting System Quiz

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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).

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.

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.

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".