Environmental Studies · General Awareness
Energy Efficiency and Green Buildings
2,475 Questions
Energy efficiency and green buildings focus on sustainable architecture, energy conservation, and green rating systems. Questions explore energy management systems, building emissions, and efficient appliances. This topic is highly relevant for environmental science papers and general awareness sections.
Green building certificationsEnergy conservation measuresSustainable architectureEnergy management systemsEnergy efficient appliancesCarbon emission policies
Energy Efficiency and Green Buildings Questions
The best way to conserve energy is
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Install exhaust fan at a high elevation
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Use of fluorescent bulbs
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Turn off light when not in use
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All of the above
D
Correct answer
Explanation
Conservation of energy is of great concern nowadays. Light is also a form of energy which should not be wasted. The best way to conserve the light energy are as follows.
(i) Turn off the lights when not in use.
(ii) De-dust lighting fixtures to maintain illumination.
(iii) LED Lamps should be used instead of conventional incandescent bulbs. For example, a 16w LED bulb can be as
bright as 150w halogen lamp. LED lamp consumes 1/3rd of CFL energy and 1/30th energy
of incandescent bulbs.
(iv) Conventional regulators should be replaced with electronic regulators for ceiling fans.
(v) Install exhaust fans at a higher elevation than ceiling fans. In diary/poultry industry usage of multi fan axial fans leads to low
energy consumption with low noise levels etc.
Thus, the correct option is D.
Identify the energy saving light bulb.
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Incandescent bulb
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Compact fluorescent light bulb
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Light emitting diode bulb
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Both B and C
D
Correct answer
Explanation
CFL (Compact fluorescent light bulbs) and LED (Light emitting diode bulb) are used in place of incandescent bulb because they use about 1/7$^{th}$ of the power used by the incandescent bulb. Hence, they are highly efficient in saving electricity.
Thus, the correct answer is option D.
Which of the following is a major advantage of rooftop gardening?
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It reduces the energy consumption
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It is good for the ambience
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It is an economical process
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None of the above
A
Correct answer
Explanation
Roof gardening is a type of garden which is started on the roof of the building. It is an ideal way of urban gardening. The advantage of this gardening is it helps in runoff stormwater, these are energy efficient, improves air quality, etc.
So, the correct option is 'It reduces the energy consumption'.
Which of these is not related to energy efficiency?
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Useful energy
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$kW$
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Heat
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Energy transformation
B
Correct answer
Explanation
Energy efficiency measures how much of energy is put into device to do intended job. So, it is related to useful energy, heat and energy transformation.
$kW$ or kilowatts are unit used to measure amount of electric power.
Which of the following is/are energy efficient products?
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Tube lights
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Bulbs
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LEDs
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CFLs
C,D
Correct answer
Explanation
he electricity used over the lifetime of a single incandescent bulb costs 5 to 10 times the original purchase price of the bulb itself. Light Emitting Diode (LED) and Compact Fluorescent Lights (CFL) bulbs have revolutionized energy-efficient lighting. CFLs are simply miniature versions of full-sized fluorescents.
Measure of the operational efficiency of a thermal plant:
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Power load factor.
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Power leakage factor.
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Plant load factor.
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Plant leakage factor.
C
Correct answer
Explanation
Plant load factor measures the power generating capacity of a thermal plant by calculating the energy load which the plant produces at a given point of time.
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They can use LED light bulbs.
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They can wash their clothes in hot water.
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They can increase their use of natural gas.
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They can install coal-powered heaters.
A
Correct answer
Explanation
Using LED light bulbs is an effective way to conserve energy because they use up to 80% less energy than traditional incandescent bulbs. Washing clothes in hot water and using fossil-fuel-based heaters actually increase energy consumption and carbon emissions.
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Cavity wall & loft insulation
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Double glazing
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Timed window opening
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Solar panels on rooftops
C
Correct answer
Explanation
Opening windows on a timer can lead to heat loss in winter or heat gain in summer, which increases the energy needed for climate control. Insulation, double glazing, and solar panels are standard sustainable practices for improving home energy efficiency or generating clean energy.
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increased forms of energy
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increased efficiency
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increased carpooling
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increased recycing
B
Correct answer
Explanation
Energy efficiency involves using less energy to perform the same task, such as using LED bulbs or better insulation. This directly reduces the total energy demand.
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Chrome matching appliances
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72 inch television
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more bedrooms and a larger kitchen
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extra insulation in the attic/energy efficient appliances
D
Correct answer
Explanation
Proper insulation prevents heat transfer, reducing the need for heating and cooling, while energy-efficient appliances consume less electricity, both of which directly lower energy costs.
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turn off AC when not in use
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provide blinds to cover windows
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add insulation in the ceiling
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all of the above
D
Correct answer
Explanation
Turning off AC units, using blinds to block solar heat gain, and adding insulation to prevent heat transfer are all effective methods to reduce electricity consumption in a building.
LEDs are extensively used to replace . bulbs because:
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it consumes less electricity
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have longer life
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has more power
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all of the above
D
Correct answer
Explanation
A light-emitting diode (LED) is a two-lead semiconductor light source. it is a p-n junction diode, which emits light when activated. LEDs have more power, more life time and consume less electricity than a bulb, thus these are extensively used to replace bulbs.
Which of the following is an example of a technology that can improve energy efficiency?
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Incandescent light bulbs
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Compact fluorescent lamps (CFLs)
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Light-emitting diodes (LEDs)
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Halogen lamps
C
Correct answer
Explanation
LEDs are more energy-efficient than incandescent light bulbs, CFLs, and halogen lamps.
What are some of the benefits of green roofs for building owners?
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Reduced energy costs
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Improved air quality
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Extended roof life
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All of the above
D
Correct answer
Explanation
Green roofs can provide a number of benefits for building owners, including reduced energy costs, improved air quality, and extended roof life. Green roofs can help to reduce energy costs by insulating the building and reducing the amount of heat that is absorbed by the roof. Green roofs can also help to improve air quality by absorbing pollutants and releasing oxygen. Additionally, green roofs can help to extend the life of the roof by protecting it from the elements.
How can technology contribute to the sustainability of vacation rentals?
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Energy-efficient appliances
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Smart thermostats
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Water conservation systems
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Recycling programs
A
Correct answer
Explanation
Technology can contribute to the sustainability of vacation rentals by incorporating energy-efficient appliances, smart thermostats, and water conservation systems, reducing the environmental impact of these properties.